This manual is designed to help you get the most out of the S4 by providing clear and structured information on every aspect of its functionality. Whether you’re just getting started or diving deep into advanced features, this guide offers both high-level overviews and detailed explanations.

The manual is organized into chapters based on major components of the S4 workflow, including navigation, project management, modulation, devices, performance tools, and system settings. Each section walks through concepts, parameters, and interactions in a practical and accessible format.

Use this guide as a reference to learn, explore, and troubleshoot as you work with the S4. Search through the user guide, navigate through the menu or use the Quick Links below.

Quick Links

The S4 is a sculpting sampler designed to capture and transform sounds. Merging tape-era workflows with cutting-edge technology, the S4 redefines sound mangling by providing a futuristic platform for crafting unique soundscapes and compositions using samples and real-time audio processing.

A tool made for sonic explorers, the S4 has four parallel stereo tracks, each with an audio engine featuring a chain of audio devices including samplers, live granular processing, morphing resonators, and a range of audio effects. A novel modulation system allows anything and everything to be modulated with four modulators per track. Capture sounds on the fly with the onboard microphone and stereo line input, or load samples from the four gigabyte internal flash storage.

FCC Compliance Statement

This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

Canada

This Class B digital apparatus complies with Canadian ICES-003. Cet appareil numérique de la classe B est conforme à la norme NMB-003.

Notice: The product complies with Part 15 of the FCC rules and with ICES-003 of ISED Canada license exempt standard(s). Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation.

Déclarations: Le présent appareil est conforme aux CNR Innovation, Sciences et Développement économique (ISDE) Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivant (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

European Union Regulation Compliance Statement

This product has been tested to comply with the Low Voltage Directive 2014/35/EU and the Electromagnetic Compatibility Directive 2014/30/EU. The product meets the requirements of RoHS 3 Directive 2015/863/EU.

Safety and Maintenance Instructions

Please read these instructions carefully and adhere to the operating advice.

1. Do not use this unit near water or in high humidity surrounding.

2. Never use aggressive cleaners on the casing or on the screen. Remove dust, dirt and fingerprints with a soft, dry and non-abrasive cloth. More persistent dirt can be removed with a slightly damp cloth using only water. Disconnect all cables while doing this. Only reconnect them when the product is safely dry.

3. Connect the unit to an easily accessible electrical outlet close to the unit.

4. When transporting the unit, use accessories recommended by the manufacturer or the original box and padding.

Legal Disclaimer

The information in this document is believed to be accurate at the time of printing but is subject to change without notice. Torso Electronics assumes no responsibility for any errors and may make improvements or modifications to the products described at any time. In no event shall Torso Electronics be liable for any special, indirect, or consequential damages arising from the use or performance of this information.

Track Architecture

The S4 features four stereo tracks, each with its own chain of five devices. Also, each track provides four modulators, which can be assigned to modulate any device parameter within the same track.

All four tracks are routed in parallel to the internal mixer for further processing.

Track View

The Track View provides an overview of the four tracks on the S4. In this view, tracks can be selected and routed into other tracks using sends. The diagram in the Track View indicates whether devices on the selected track are active or bypassed.

Opening the Track View

• Tap the [TRACK] button to open the Track View

Creating a new project

1. Tap [PROJECT] to open the Project View

This chapter provides a detailed breakdown of every Modulator available on the S4. Each Modulator has its own dedicated section, covering its core functionality, available parameters, actions and any unique behaviours or modes.

Modulators

S4 is powered using the dedicated 12V AC to DC power supply. The S4 will automatically boot when plugged via the power supply.

In general, it is impossible to give details for each connected device but there are some specifications to consider.

• S4 standalone power and general consumption: 1A, 12V (12 Watt)

• S4 powering a connected Torso Electronics T-1: 1.2A, 12V (14.4 Watt)

The Global Tempo sets the tempo in beats per minute across all tracks and scenes. This can be adjusted between from 24 BPM up to 284 BPM. The Global Tempo is displayed in the top right of the header.

Setting the Global Tempo

1. Navigate to any device

2. Turn the SELECT encoder to change the Global Tempo

The SYNC IN and SYNC OUT in and outputs on the rear panel of the S4, can be used to connect to and from analog gear. The S4 can send or receive an analog clock at 24 PPQN.

To completely reset the S4 a factory reset can be made directly on the machine. Factory resetting the S4 will remove all user samples and projects.

1. Tap the [CONFIG] button to open the config menu.

2. Use the SELECT knob or the action buttons to navigate SYSTEM.

3. Tap [OPEN] or press the SELECT knob to enter the SYSTEM submenu.

4. Navigate to the Factory Reset option.

5. Tap [OPEN] or the SELECT knob to initiate the Factory Reset process.

6. Confirm the reset when prompted.

This chapter provides a detailed breakdown of every Device available on the S4. Each Device has its own dedicated section, covering its core functionality, available parameters, actions and any unique behaviours or modes.

Material

Granular

Filter

Color

Space

The S4's four individual tracks have a number of different configuration settings, including options for inputs and MIDI.

Track Input Configuration

1. Tap [CONFIG] to open the Config menu

2. Navigate to the AUDIO menu and open it

3. Highlight one of the TRACK 1-4 INPUT options

4. While highlighted, tap [SELECT] to toggle through the configurations

There are four different input options that can be configured per track.

• STEREO: Track receives audio from IN1 and IN2 as left and right channels

• IN1: Track receives audio from IN1 as a mono input

• IN2: Track receives audio from IN2 as a mono input

• SENDS ONLY: This option will ignore the other input options and only receive audio from sends

MIDI Channel Configuration

Each Track on the S4 can be configured to receive MIDI from any of the 16 MIDI Channels.

Configuring External Audio Source

Different options are available to choose from when it comes to which external audio source is active. These options are found in the Config menu. The input option is configured globally and works across the entire project.

1. Tap [CONFIG] to open the Config menu

2. Navigate to the AUDIO menu and open it

3. Highlight the INPUT option

4. While highlighted, tap [SELECT] to toggle through the configurations

There are four different input options are available to be set globally.

• IN1/IN2: Receive audio from line in jacks

• MIC: Receive audio from internal microphone

• IN1/MIC: Use one channel (IN1) of the line in jacks, as well as the internal microphone

• HEADSET: Uses the headphone mini jack (TRRS)

Internal Microphone Gain

The gain of the internal microphone can be adjusted in the Config menu.

1. Tap [CONFIG] to open the Config menu

2. Navigate to the AUDIO menu and open it

3. Highlight the INPUT option

4. While highlighted, tap [SELECT] or use one of the eight Parameter Encoders to toggle through the configurations

The biggest update for the S4 is out now!

We’re excited to finally share OS 2.0 for the S4 Sculpting Sampler. The biggest update to the S4 since its launch – fulfilling our original vision for the instrument. The update features a full rewrite of the core engine and unlocks new features such as macro controls, scenes, varispeed recording, unlimited sample playback, and new dynamic modulation options.

2.0 Highlights

Create global macros to control multiple parameters at once. Map any parameter to eight performance knobs and four punch-in effect buttons for expressive changes with a single gesture.

Save and instantly launch parameter and sample snapshots. Capture full machine states, build variations, and swap samples on the fly — with up to 128 scenes per project, controllable on-device or via MIDI Program Change.

Temp brings performance functionality with temporary control of all parameters. When temp is enabled, S4 saves the initial state and snaps back instantly when released.

A new playback device that streams audio directly from internal storage. Perfect for long loops, stems, and field recordings, limited only by storage capacity.

A new modulation source: an envelope follower that uses track output or input signals to modulate parameters in real time.

Workflow Enhancements New features include device/track/scene , enhanced device with varispeed recording. The interface has received a comprehensive overhaul, and many existing devices have been improved with new features.

Get the Update

S4 OS 2.0 is available now as a free download for all S4 owners. Head to our to download the latest firmware.

Join the Conversation

We value your feedback — join our Discord to share ideas, get early updates, and help shape future developments.

Thanks for your continued support. We can’t wait to hear what you create. Torso Electronics

The S4 audio engine provides five sequentially arranged device slots per track. Each slot can be configured by selecting a specific device and adjusting its parameters either manually or through automatic modulation.

The device structure of the S4 is the heart of the S4's audio engine, with each of the five device slots providing different options for both audio playback and live mangling capabilities.

Device Chain

The five device slots are arranged from left to right, as seen on the S4 . Each device continuously receives audio input from the preceding device and passes its output to the next device in the chain.

Whether it’s live input, recorded audio, or loaded samples, the MATERIAL device slot serves as the sound source on the S4. The preceding devices are effect devices.

Modulator

The ADSR modulator brings familiar envelope control to any parameter on the S4. Triggered by MIDI or via the integrated action button, it allows you to sculpt modulation over time with classic attack, decay, sustain, and release stages.

Parameters

Actions

Triggering The Envelope

There are two ways to trigger the envelope:

1. Using [TRIG] action button.

• Press [TRIG] to initiate Attack stage and keep holding to continue Decay stage

• Release button to initiate Release stage

1. From an incoming MIDI Note on the tracks MIDI Channel.

The S4 features seamless recording of the main output. This feature can be used to capture live performances or for intuitive resampling on the fly. By default the Main Recording feature is quantized to the Global Tempo, but this setting can be adjusted.

Start recording:

• Hold [CTRL] + tap [PLAY]

Stop recording:

• Hold [CTRL] + tap [PLAY] again

Selecting a track

1. Tap [TRACK] to open the Track View

Space Device

VAST is a spacious, delay and reverb processor designed for lush textures and expansive depth. It combines delay with reverb, each with dedicated dry/wet controls. Shape the filtering of incoming audio within the feedback path, and switch between flexible delay modes. VAST can range from clean rhythmic echoes to dense, immersive soundscapes with capabilities for infinite feedback.

Modulation is the process of affecting the value of a parameter using a control source. These control sources are called modulators. Different modulators are available to choose from on the S4, allowing for many different creative use cases and combinations of mappings.

Modulation Basics

Modulation can be applied to any parameter on the S4, enabling dynamic and expressive control. A modulator has no limit on mapping destinations. Modulators always exist in groups of four slots, and several areas of the S4 architecture include dedicated modulators:

Modulator

Unpredictable and organic, the RANDOM modulator introduces evolving, non-repeating variations to your sound. From subtle drift to chaotic fluctuations, this modulator is ideal for adding life, texture, and movement with or without strict repetition.

CHANCE and RULE settings can be applied to automate Scene launching. Only Scenes that are in a CHAIN is affected by CHANCE and RULE. The following is a walkthrough on how to use this functionality, and how these parameter work together.

Chain

The first step of automating Scene launching is to create a Chain. Chains can easily be created in the Scene View.

Applying Modulation to a Device Parameter

1. Open Mapping Mode by holding [MOD] and navigate to the desired modulator using one of the four [ACTION] buttons

Several functions in the S4 will require text editing. This is done through the Naming Editor.

Changing Character

• Rotate the SELECT encoder

How do I repport a bug?

Send us an email at

• Describe the bug

The S4 can be connected to a computer using USB Mass Storage Mode. In this mode, the S4 appears as a standard drive on the computer, allowing for easy transfer of samples and entire projects. It also enables backing up data or extracting recordings made on the S4.

1. Connect a compatible USB cable between the PC / Mac and the S4 USB-C connector.

2. Tap [CONFIG] to open the configuration page of the S4.

Projects can be conveniently saved and recalled, allowing for the creation of live sets and audio processing configurations. When the S4 starts up, it loads an empty project. All operations regarding projects are accessed in the Project View.

Opening the Project View

• Tap the [PROJECT] button to open the Project View

and features a setting for how the monitor behaves when recording. The setting is called MONITOR ON RECORD and is global for all instances of TAPE and DISC in a project.

• ON: Automatically enables MONITOR when recording

• OFF: Does not automatically enable MONITOR when recording

Adjusting the monitor setting is done through the Config menu.

By default adjustments made in a Scene will always be saved. However, Scene parameters and samples can be locked. This means that changes applied to the scene after locking it, will revert once the scene is retrigged or automatically launched.

1. Tap [SCENE] to open the Scene View

2. Use the SELECT encoder or the UP and DOWN [ACTION] buttons to highlight a scene

The S4 supports MIDI communication through both its dedicated MIDI In/Out ports and the USB-C connection. Each of the four tracks can be independently controlled via dedicated MIDI channels. The MIDI In and Out ports use TRS Type A 3.5mm jacks and require a compatible adapter to connect to standard MIDI DIN cables.

5 Pin DIN MIDI In / Out

The rear panel of the S4 includes two dedicated MIDI ports designed for use with 3.5mm to 5-pin DIN Type A adapters. These allow standard 5-pin DIN MIDI cables to be connected seamlessly. To control the S4 using external gear—such as a MIDI keyboard or sequencer—simply connect the device to the MIDI Input port.

USB MIDI In / Out

The USB-C Connection also allows interfacing to other gear, DAWs and controllers. S4 is supported as a USB MIDI device on Windows, macOS, and Linux.

Set the S4 and the external device to the same MIDI Channel i.e. Channel 1.

USB Host/Device mode

The S4 USB-C port can operate as either USB host or USB device. Each mode supports different ways of operation.

Host mode

• The S4 is a host for other USB devices. In this mode you can connect a USB MIDI device to the S4. For connecting multiple MIDI devices you can use a USB (2.0 or 3.0) Hub.

Device mode

• The S4 is connected to another USB host, eg. a computer. In this mode, the S4 operates both as a USB Audio and MIDI device.

Devices, modulators, and tracks can be copied and pasted within a project using the [COPY] button.

Copying:

• Navigate to a Device and tap [COPY] to copy the selected Device

• Navigate to a Modulator and tap [COPY] to copy the selected Modulator

• Open the Track View and tap [COPY] to copy the selected Track

• Open the Scene View and tap [COPY] to copy the highlighted Scene

Pasting:

• Copy a Device, Modulator, Track or Scene

• Navigate to the desired destination (depending on what was copied)

• Hold [CTRL] and tap [COPY] to paste

The TEMP function lets you create temporary parameter changes that revert when TEMP is deactivated.

Momentary Mode

• Hold [TEMP], make changes, then release to revert

Latching Mode

• Double-tap [TEMP] to make changes, then tap again to revert

Different functionality on the S4 benefit from the option to choose quantization options.

• TRACK PLAY: Adjust the quantization for launching individual tracks

• TRACK RECORD: Adjust the quantization for recording in devices

• MAIN RECORD: Adjust the quantization for main record

Adjusting quantization settings is done through the Config menu.

1. Tap [CONFIG] to open the Config menu

2. Navigate to the METER menu and open it

3. Configure quantization settings by tapping [SELECT] or adjusting any of the eight Parameter Encoders

Modulator

The FOLLOW modulator reacts directly to internal or external audio, shaping modulation based on amplitude. Create dynamic, responsive effects like ducking, pumping, or reactive filtering, all perfectly synced.

Parameters

Actions

Material Device

POLY is an 8-voice polyphonic sample playback engine designed for expressive, multi-voice hands-on play. Load a sample and shape it with precise control over pitch, start point, length, amplitude, and looping behavior. Loop regions can be crossfaded for seamless repetition. POLY features a flexible envelope section and velocity sensitivity for dynamic response when triggered externally via MIDI. Filter modulation is integrated allowing dynamic filtering per voice.

Parameters

Actions

Modulator

Classic LFOs, looping envelopes, total chaos, or anything in between, the WAVE modulator lets you create a wide range of dynamic modulations by shaping and bending an oscillating wave for creative parameter control. Discover new rhythms when keeping the modulator in time, or free the modulator from the constraints of a synced tempo.

Parameters

Actions

PERFORM is the S4’s global macro control, offering a central hub for managing parameters from a single interface. Creating custom macros is simple, giving you the flexibility to tailor the S4 to your unique creative needs. PERFORM features 8 slider macros and 4 action macros for custom mappings.

Perform View

All PERFORM functionality is accessed through the Perform View, which is opened using the dedicated button on the S4’s front panel.

Opening the Perform View

• Tap the [PERFORM] button to open the Perform View

PERFORM Macro Behaviour

To understand how PERFORM macros interact with the S4’s architecture, there are a few key points to consider:

• Relative Control: PERFORM macros act relatively to existing parameter values and modulation. This means they add to, rather than replace, current settings. This allows for expressive, layered control.

• Project-Wide Mapping: PERFORM macros are project-dependent and apply across all scenes within a project. For example, a macro mapped to a parameter on Track 1 in Scene 001 will also affect Track 1 in Scene 002, Scene 003, and so on.

• Unique Modulators: Like the Mix View and the individual Tracks, PERFORM features its

Launch a Scene

1. Tap [SCENE] to open the Scene View

2. Navigate to a SCENE using the SELECT encoder or the [ACTION] buttons

3. Tap [LAUNCH]

Launch Next or Previous Scene

1. Hold [SCENE]

2. Tap UP or DOWN [ACTION] buttons to cue the next or previous Scene

3. While the Scene is cueing, keep tapping the UP or DOWN [ACTION] buttons to cycle through Scenes

Retriggering a Scene

1. Hold [SCENE]

2. Tap [RETRIG] to trigger the active Scene

Launching a Random Scene

1. Hold [SCENE]

2. Tap [RANDOM] to launch a random scene

Scene Launch Quantization

Any Scene that is launched on the S4 is quantized by default. The quantization is adjusted via the QUANTIZE parameter in the Scene View. The QUANTIZE parameter has different parameter modes to set the desired quantization. Modes like STRAIGHT, TRIPLET, DOTTED and FREE is available here, like on other similar time-based parameters.

However, the QUANTIZE parameter in the Scene View also features two other modes:

• SAMPLE END: This mode will quantize the launching of Scenes to the end of the sample loaded in one of the four tracks, which can be set after choosing this Parameter Mode for QUANTIZE.

• OFF: Off will bypass quantization entirely, and will also bypass the ability to launch chained Scenes.

Program Change

Scenes can be launched externally using MIDI Program Change .

S4 System

The S4 has 4GB of internal storage. All projects stored on the S-4 can access any sample. The S-4 also stores a handful of config settings independently of projects, such as MIDI settings, MISC settings and the MAIN LEVEL.

External Drive

The S4 can store samples internally, but its storage capacity can be expanded by connecting an external flash drive to store additional samples.

Projects

A project is the primary container for stored data on the S4, encompassing all 128 available scenes. It also retains all mappings and parameter values from the PERFORM and MIX views, along with their respective sets of four modulators.

Scenes

Scenes are located directly below projects in the hierarchy. Each scene stores all track related data on the S4.

Tracks

Tracks store device settings, track-specific modulators, and buffers used in MATERIAL devices such as TAPE and POLY. The S4 provides four tracks in total.

Product Design & Development

Mathias Bredholt

Mathias Kirkegaard

Lars Buchholtz

Jonas Kenton

Daniel Mouritzen

Jacob Hvid Amstrup

Factory Samples Contributions

Petra Skibsted / peachlyfe

Nikolaj Manuel Vonsild

When Saints Go Machine

Christian Balvig

Patrick Alexander Bech-Madsen / Sekuoia

Troels B-Knudsen / Ctrls

Jacob Hvid Amstrup / OEDELAND

Jacob Løhde

Bogdan Raczynski

Support

[email protected]

Terms & Conditions

SCENE allows for the creation of up to 128 unique scenes, each with full parameter and sample recall. Scenes can be launched seamlessly, making them ideal for everything from subtle variations to entirely distinct sections within a live set. Parameters and sample changes can be included or excluded per track, offering flexible control. Tools like CHANCE and RULE enable automated scene launching, while CHAIN and LOCK support dynamic, performance-driven applications.

Scene View

All SCENE functionality is accessed through the Scene View, which is opened using the dedicated button on the S4’s front panel.

Opening the Scene View

• Tap the [SCENE] button to open the Scene View

Creating a new Scene

When opening a new project on the S4, 128 blank Scenes are automatically created. To start creating Scenes on the S4, simply open up any Scene, load samples and adjust parameters. Blank Scenes are greyed in the Scene View list and non-blank Scenes will be highlighted in white. Scenes are automatically saved when saving the project.

Scenes and Project Sample Pool

Each project includes a sample pool of 36 buffers (used by TAPE and POLY). Loading a sample or recording in TAPE will automatically start to populate the sample pool, indicated by the visualisation in the Scene View. Audio loaded in DISC does not count toward this limit.

Keep Params and Sample

While the Scene functionality on the S4 is designed to create complete states across all four tracks, there is also the option to keep certain settings on specific tracks for more tailored use cases. These settings are available per track.

• KEEP PARAMS: When toggled, this option will keep all parameter settings intact on the specified Track.

• KEEP SAMPLE: When toggled, this option will keep the loaded sample the Material device intact on the specified Track.

Adjusting these settings is done through the Config menu.

1. Tap [CONFIG] to open the Config menu

2. Open the SCENE menu

3. Open either TRACK 1, TRACK 2, TRACK 3 or TRACK 4

4. Adjust KEEP SAMPLE and

Copying and Clearing Scenes

and is done through the dedicated [COPY] and [CLEAR] buttons on the interface.

The [CLEAR] button allows to reset parameters to default, clear applied modulation, buffers, or entire tracks and scenes.

Clear Parameter

You can quickly reset any parameter on the S4 to its default value using the [CLEAR] button. This is especially helpful when you want to undo changes and return to a clean starting point.

1. Hold [CLEAR] and then turn (or tap) the corresponding PARAMETER encoder

2. The parameter will instantly return to its default value

Clear Buffer, Mods, Params, Device

• Navigate to any of the five devices in the Device Chain

• Hold [CLEAR] to open available options

Clear Track

1. Open the Track View by tapping [TRACK]

2. Hold [CLEAR] and tap one of the four [ACTION] buttons

3. The corresponding Track is cleared

Clear Scene

1. Open the Scene View by tapping [SCENE]

2. Use the SELECT encoder or the [ACTION] buttons to highlight a Scene

3. Hold [CLEAR] and tap [CLEAR] to clear the Scene

The Sample Browser is an overview of the samples both located on the internal storage as well as external storage if connected. The Sample Browser can be accessed when loading samples from Material Devices. Other than getting an overview of available samples, the Sample Browser also has an integrated Sample Preview feature, that allows seamless monitoring of any sample.

Sample Preview

Samples can be previewed directly in the Sample Browser, for both Factory and User Samples.

1. Navigate to the Sample Browser (Open an instance of , or and tap [LOAD])

2. Navigate to a sample

3. Hold [CTRL] to open the Sample Preview Interface

4. While holding [CTRL], press and hold

Delete Sample or Folder

1. Highlight sample or folder

2. Tap [CLEAR]

3. A prompt will be presented to confirm

Handling user samples

To copy, back up, and transfer samples in and out of the S4, connect to a PC or Mac using the .

Recovery Mode will boot the S4 directly into USB Mass Storage Mode.

1. Turn off the S4 by plugging out the power cable

2. Connect a compatible USB cable between the PC / Mac and the S4 USB-C connector

3. Hold [CTRL]

4. Turn on the S4 by plugging in the power cable

5. The S4 will display Recovery Mode and wait for a USB connection before entering

Track MIDI Channel

To communicate between the two connected devices the MIDI channel must be set to the same channel on each. Check with the manufacturers documentation for any external device MIDI configuration. Each track of the S4 can be configured to receive MIDI on its own individual channel.

Selecting a Device Slot on a Track

• Select a Device Slot by tapping one of the [DEVICE] buttons

Granular Device

MOSAIC lets you reshape audio in real time, with up to 64 grains per track in a 4-second buffer. Sculpt and twist your sound with a mix of precise control and unexpected textures. Build evolving, intricate soundscapes by controlling grain shape and size, embrace per-grain randomness to keep things unpredictable or use the device as a live audio arpeggiator.

• Processor: Quad-core 1.5 GHz

• Internal Memory: 4 GB (expandable via USB)

Using samples on an external USB drive

When inserting a USB flash drive into the S4, a folder in the Sample Browser becomes available called USB DRIVE. The samples on the drive can be accessed from this folder.

The USB flash drive needs to be formatted to FAT32 in order for it to be used with the S4. You can not copy the samples from the USB flash drive onto the S4.

The S4 can be connected with an external USB Drive to access samples. The drive will be visible in the sample browser and will allow samples to be loaded to the relevant device. Samples cannot be copied from the flash drive to the S4.

1. Connect a USB Drive directly to the USB-C Connection.

2. Tap [LOAD] in DISC, TAPE or POLY to access the .

The display brightness of the S4 can be adjusted within the [CONFIG] menu.

1. Tap [CONFIG]

2. Open MISC menu

3. Navigate to highlight the DISPLAY BRIGHTNESS

All Perform Macros can be renamed for easier identification and organization. By default, they are labeled “Macro 1”, “Macro 2”, “Macro 3”, and so on in a new project. Macros can be renamed via the Config menu.

Renaming macros

1. Tap [CONFIG] and go to PERFORM

Selecting a Perform Macro

1. From any view, hold [PERFORM] and [CTRL]

2. An overlay will fill the screen, indicating that a Perform Macro can be selected

3. While holding, tap one of the eight Parameter encoders or one of the four [ACTION] buttons to select a Perform Macro

4. Let go of [PERFORM] and [CTRL] to return to the previous view

Mapping Device Parameters to a Perform Macro

1. Navigate to the Device Parameter you want to map to the selected Perform Macro

2. Hold [PERFORM] to enter Mapping Mode

3. While holding [PERFORM] adjust the parameter to set the mapping amount

Visual Indication of Perform Macro Mappings

Both the graphical user interface and the device button LEDs provide clear visual feedback on how Perform Macros are applied to specific parameters. This helps identify which parameters are being modulated at a glance:

• A small indicator bar appears on the slider of any mapped parameter, reflecting its current value, if the parameter is modulated by a macro.

• When in Mapping Mode, the [DEVICE] button LEDs light up in pink, if a parameter in the device has been mapped to a Perform Macro.

Mapping Modulator Parameters to a Perform Macro

1. Navigate to a Track or tap [MIX] to open the Mix View

2. Tap [MOD] or hold [MOD] and double tap an [ACTION] button to open the Modulation Source View of the desired modulator

3. Hold [PERFORM] to enter Mapping Mode

Switching Between UNIPOLAR and BIPOLAR Modes

Perform Macros on the S4 features two modes: UNIPOLAR and BIPOLAR. You can toggle between these modes to define how a Perform Macro behaves. This is done seamlessly and non-destructively, meaning that mappings made for a Perform Macro prior to changing modes will persist.

1. Tap [PERFORM] to enter the Perform view

2. Tap and hold a PARAMETER encoder

3. While holding switch between UNIPOLAR and BIPOLAR modes for that specific Perform Macro

4. Release the Parameter Encoder to confirm the selection

Clearing Perform Macro Mapping

1. Tap and hold [PERFORM] and [CLEAR]

2. While holding, tap one of the eight PARAMETER encoders or one of the four [ACTION] Buttons to select a Perform Macro

3. Navigate to a Mapped PARAMETER

4. Turn or tap the PARAMETER encoder

Color Device

DEFORM is a dual-band distortion tool blending analog-style overdrive, bit crushing effects, compression, and noise following algorithms. The noise generator conforms to incoming audio, and has controls for intensity, decay, and filtering. The effect can be blended with the original signal allowing creative flexibility from subtle warmth to extreme destruction.

Parameters

Actions

This device has no actions.

Signal chain

The DEFORM device features a number of different effects. These effects are routed together in a fixed signal chain, which can be seen below:

1. NOISE

2. DRIVE

3. CRUSH

4. COMPRESS

Filter Device

The RING device offers everything from traditional filtering to experimental resonating effects and animated modulation. Each filter's resonance can be increased to craft metallic tones or soothing, harmonic textures when quantized to a scale. Morph the entire filter bank for dynamic, evolving sounds, or skew individual filters to shape and balance the incoming signal with precision.

Parameters

Actions

This device has no actions.

All four tracks of the S4 are combined in the final audio stage in a project. In the Mix View volume, panning and filtering per Track can be adjusted. The Mix View also allows for launching and muting individual Tracks, as well as applying compression to the final output of the S4.

Opening the Mix View

• Tap the [MIX] button to open the Scene View

Parameters

Configuring Track Launch State

Each track can be individually configured to follow the global play state of the S4. Unlike traditional mute functions, this allows for more musical control when starting or stopping tracks, as the trailing effects of the device chain remain audible even after a track is stopped.

Mute/Unmute Tracks

Muting tracks will prevent the specific track's entire device chain from being routed into the output of the S4.

By connecting the S4 to through the USB-C to a computer running a DAW (Windows, macOS, or Linux), the S4 can act as USB audio interface. The S4 streams the individual stereo tracks and the main out through a 10 in/10 out USB audio connection. To access individual tracks in a DAW, follow the routing below:

Step-by-Step

1. Download the latest S4 OS update file. Make sure to not unzip the downloaded file.

2. Connect the S4 to the computer using a USB-C or USB-C to USB-A cable (depending on computer).

3. Enter on the S4.

4. Drag and drop the update .zip file into the root folder of the S4 (the top level of the drive, not inside any other folder).

5. Use the computer’s eject function to disconnect the S4.

6. Tap [CONFIG], go to SYSTEM menu.

7. Select INSTALL UPDATE to install the update.

When the S4 has completed the installation of the OS, the system will reboot and the update file will automatically be removed from the device.

Updating from v1.x to v2.x

The v2.x installation cannot proceed if user samples, recordings, or projects remain on the S4.

When the update is complete, enter to transfer any user samples, recordings and projects back on to the S4.

Material Device

TAPE is a device designed for live looping and overdubbing. Both variable and fixed recording lengths are supported for recording into the dedicated 30-second buffer on each instance of the device. Utilising varispeed recording allows for recording and overdubbing in different speeds or even in reverse on the virtual tape for complex, layered sequences.

Parameters

Parameters on the S4 are value sliders that respond to both user input and modulation. The values set by these parameters directly control the audio engine, shaping the behavior and sound of each device. The 2×8 parameter layout shown on the display always corresponds to the PARAMETER encoders on the front panel.

Connecting and syncing with Ableton Live

Syncing with Ableton Live

To ensure the best sync between the S4 and Ableton Live, we recommend setting Abletons MIDI Clock Type to Pattern.

Audio over USB with Ableton Live

Scales can be configured in different Devices, primarily as Parameter Modes. The following is a complete overview of all scales available on the S4. A FREE mode is also available, which is not quantized to any scale.

There are two views available when working with modulation on the S4: Mapping Mode and the Modulation Source View. The two modulation views are described below.

Mapping Mode

This is where modulation is applied. In Mapping Mode, devices can be navigated and modulation mappings can be made. The view focuses on which parameters are being modulated and allows for quick, hands-on mapping.

Opening Mapping Mode

1. Hold [MOD] to open Mapping Mode

2. While holding [MOD] tap an [ACTION] button to navigate to any of the four modulators

3. Letting go of [MOD] will either:

   1. Return to device if a mapping has been made

Modulation Source View

This view is where individual modulator settings are adjusted. Each modulator offers a unique set of controls, which vary based on the type of modulator selected in a slot. The Modulation Source View is used to define how the modulation behaves.

Opening the Modulation Source View

1. Tap [MOD] to open the Modulation Source View

2. To switch modulators when viewing the Modulation Source View, hold [MOD] and tap any of the four [ACTION] buttons and let go of [MOD]

3. Tap [MOD] again to close the Modulation Source View

Toggling between Mapping Mode and the Modulation Source View

1. Hold [MOD] to enter Mapping Mode

2. While holding [MOD], tap an [ACTION] button to access one of the four modulators

3. While still holding [MOD], tap the same [ACTION] button repeatedly to toggle between Mapping Mode and the Modulation Source View

Assigning a Modulator to a Modulator Slot

Like Devices, Modulators follow the same modular structure. This means that the type of Modulator selected in any given Modulator Slot can be changed at any time.

1. While in Modulation Source View, tap [SELECT] to see list of Modulators

2. Highlight a Modulator

3. Tap [SELECT] to assign the highlighted Modulator to the current Modulator Slot

Material Device

DISC is a sample playback device that streams audio directly from disk, enabling playback of long-form audio files. Ideal for full-length stems, field recordings, or long loops, DISC is only limited by available storage space. With familiar controls for pitch, start, length, and amplitude, it offers intuitive handling of audio files while maintaining precise timing and integration within the device chain.

Parameters

Actions

TEMPO modes

Unique for DISC is the option to choose between different TEMPO modes. These modes will adjust the behaviour of how DISC will playback samples and how the SPEED/PITCH parameter works. These modes are accessed through Parameter Modes on the TEMPO parameter.

• SYNC

  • This mode ensures the loaded sample is always in sync with the Global Tempo. This is the default mode of TEMPO. SPEED can be adjusted in octaves and if adjusted the playhead will jump in time so playback will remain in sync.

• STRETCH

Recording in DISC

DISC allows for recording into a new file on the internal storage. The recorded audio is a mix of track input and the sample played in DISC, controlled by SOS parameter. When a recording has ended, either by tapping RECORD while recording, or when the local storage is full, DISC starts playback of the recorded file automatically.

Front Panel

Back Panel