# Hardware Interface

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## Front Panel

<figure><img src="https://662554179-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FHdBRp4PsMPb4tP3f8vi8%2Fuploads%2FthOekHRW6U1qc34I8X6K%2FFrontPanel%20illustration%20v3.png?alt=media&#x26;token=ecf48356-91f7-4ddc-b958-4b1c2d49daf6" alt=""><figcaption></figcaption></figure>

<table><thead><tr><th width="54.89453125" data-type="number">No.</th><th width="198.55859375">What</th><th>Description</th></tr></thead><tbody><tr><td>1</td><td><strong>SELECT encoder</strong></td><td>Controls various aspects of the S4, including tempo, device power, and general navigation through pushing or rotating.</td></tr><tr><td>2</td><td><strong>Built-in microphone</strong></td><td>-</td></tr><tr><td>3</td><td><strong>[PROJECT] button</strong></td><td>Access saving, loading and create new projects.<br><a href="../../projects-and-tracks/project-overview">Learn more</a></td></tr><tr><td>4</td><td><strong>[CONFIG] button</strong></td><td>Access configuration options of the S4.</td></tr><tr><td>5</td><td><strong>LCD display</strong></td><td>-</td></tr><tr><td>6</td><td><strong>[MOD] button</strong></td><td>Various modulation-related functions.<br><a href="../../modulation">Learn more</a></td></tr><tr><td>7</td><td><strong>Triangle</strong> <strong>[ACTION] button</strong></td><td>Context-dependent buttons that will change function based on what's on the screen.</td></tr><tr><td>8</td><td><strong>Square [ACTION] button</strong></td><td>-</td></tr><tr><td>9</td><td><strong>Hexagon [ACTION] button</strong></td><td>-</td></tr><tr><td>10</td><td><strong>Circle [ACTION] button</strong></td><td>-</td></tr><tr><td>11</td><td><strong>PARAMETER encoders</strong></td><td>Adjust parameters and set values by pushing or rotating the endless encoders.</td></tr><tr><td>12</td><td><strong>[DEVICE] buttons</strong></td><td>Device slot navigation. From left to right:<br>[MATERIAL], [GRANULAR], [FILTER], [COLOR], [SPACE]<br><a href="../../devices">Learn more</a></td></tr><tr><td>13</td><td><strong>[PLAY/STOP] button</strong></td><td>Start and stop playback.</td></tr><tr><td>14</td><td><strong>[TRACK] button</strong></td><td>Tracks navigation.<br><a href="../../track-overview">Learn more</a></td></tr><tr><td>15</td><td><strong>[SCENE] button</strong></td><td>Open the SCENE page.<br><a href="../../perform-and-scene/scene-overview">Learn more</a></td></tr><tr><td>16</td><td><strong>[MIX] button</strong></td><td>Four track mixer and master output.<br><a href="../../miscellaneous/mix-view">Learn more</a></td></tr><tr><td>17</td><td><strong>[COPY] button</strong></td><td>Button to access copy and pasting of current state.<br><a href="../../miscellaneous/copying-and-pasting">Learn more</a></td></tr><tr><td>18</td><td><strong>[CLEAR] button</strong></td><td>Hold along with another function to clear and delete.<br><a href="../../miscellaneous/clearing-and-resetting">Learn more</a></td></tr><tr><td>19</td><td><strong>[CTRL] button</strong></td><td>Hold to access secondary functions.</td></tr><tr><td>20</td><td><strong>[PERFORM] button</strong></td><td>Open the PERFORM page.<br><a href="../../perform-and-scene">Learn more</a></td></tr><tr><td>21</td><td><strong>[TEMP] button</strong></td><td>Activates temporary control functionality.<br><a href="../../miscellaneous/temporary-control">Learn more</a></td></tr></tbody></table>

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## Back Panel

<figure><img src="https://662554179-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FHdBRp4PsMPb4tP3f8vi8%2Fuploads%2Fc9ISyQd36Flyt37HrM8U%2FBackPanel%20illustration_3x.png?alt=media&#x26;token=5a3ac556-f8d9-4b33-a5f5-c973ab9d8b7a" alt=""><figcaption></figcaption></figure>

<table><thead><tr><th width="54.5" data-type="number">Number</th><th width="254.55859375">What</th><th data-hidden>Description</th></tr></thead><tbody><tr><td>1</td><td><strong>3.5 mm TRS headphone output</strong></td><td>Controls different aspects of the S-4, from tempo, powering device to general navigation via push or rotation.</td></tr><tr><td>2</td><td><strong>3.5 mm TRS (Type A) in/out</strong></td><td>-</td></tr><tr><td>3</td><td><strong>3.5 mm analog sync in/out</strong></td><td>Project navigation. Save, load and create new projects. <a href="../../projects-and-tracks/project-overview">Learn more</a></td></tr><tr><td>4</td><td><strong>2x 6.3 mm (1/4”) jack line out</strong></td><td>Access configuration options of the S-4.</td></tr><tr><td>5</td><td><strong>2x 6.3 mm (1/4”) jack line in</strong></td><td>-</td></tr><tr><td>6</td><td><strong>USB-C port</strong></td><td>Various modulation-related functions. <a href="../../modulation">Learn more</a></td></tr><tr><td>7</td><td><strong>DC in (12V/2A)</strong></td><td>Context-dependent buttons that will change function based on what's on the screen.</td></tr></tbody></table>

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