Patching modules control how data flows through your patches: pass, stop, freeze, resample, detect changes, manage collections (queue, stack, list), handle polyphony, and configure patch behavior. They are the control logic layer of Usine.
| Category | Modules | Description |
|---|---|---|
| Flow Gating | 8 | Pass, stop, freeze, and swap flows (single and multi-channel variants) |
| Flow Timing | 6 | Resample, wait (block delay), and rate conversion (audio/data rate) |
| Flow Detection | 7 | Detect changes, rising/falling edges, null flows, pass-if-changed, sample & hold, track & hold, toggle |
| Flow Collections | 4 | List, queue (FIFO), stack (LIFO), and circular buffer data structures |
| Patch Management | 11 | Bypass, on/off, comments, info editor, initialization/activation events, patch/rack numbers, password, internal messages |
| Polyphony | 4 | MIDI voice dispatcher, current voice number, poly array value, and sub-patch polyphony count |
Control whether flows pass through, are blocked, or are frozen at their current value.
| Module | Description |
|---|---|
| Flow Pass | Let flow pass when enabled, block when disabled |
| Flow Pass Multi | Multi-channel version of Flow Pass |
| Flow Stop | Block flow when enabled (inverse of Flow Pass) |
| Flow Stop Multi | Multi-channel version of Flow Stop |
| Flow Freeze | Freeze flow at its current value when enabled |
| Flow Freeze Multi | Multi-channel version of Flow Freeze |
| Flow Thru | Pure pass-through (no processing) |
| Flow Thru Multi | Multi-channel version of Flow Thru |
| Flow Swap | Swap two flows: A becomes B and B becomes A |
Control when and how often flows are evaluated, and convert between audio and data rates.
| Module | Description |
|---|---|
| Flow Resample | Resample flow at a configurable period |
| Flow Resample Multi | Multi-channel version of Flow Resample |
| Flow Wait | Delay flow by N calculation blocks |
| Flow Wait Multi | Multi-channel version of Flow Wait |
| Flow to Audio Rate | Convert data flow to audio block size |
| Flow to Data Rate | Convert audio flow to single data value |
Detect changes, edges, null states, and conditionally pass or hold values.
| Module | Description |
|---|---|
| Flow Has Changed | Output 1 when input value has changed, 0 otherwise |
| Flow Pass if Changed | Only pass flow when value has changed |
| Flow Pass if Changed Multi | Multi-channel version of Flow Pass if Changed |
| Flow From 0 to 1 | Trigger on rising edge (0 to 1 transition) |
| Flow From 1 to 0 | Trigger on falling edge (1 to 0 transition) |
| Flow Is NULL | Detect if flow is null or zero-length |
| Flow Toggle | Toggle output between on/off values on each trigger |
| Flow Sample Hold | Capture and hold input value on trigger |
| Flow Track Hold | Follow input when gate is on, hold when off |
Data structure containers for organizing and buffering flow values.
| Module | Description |
|---|---|
| Flow Collection List | Ordered collection with insert, delete, and access by index |
| Flow Collection Queue | FIFO buffer: push at back, pop from front |
| Flow Collection Stack | LIFO buffer: push and pop from top |
| Flow Collection Circular Buffer | Fixed-size ring buffer: oldest values overwritten when full |
Configure patch behavior, add documentation, detect lifecycle events, and access patch/rack info.
| Module | Description |
|---|---|
| Patch Bypass | Bypass patch calculation (audio and MIDI pass through) |
| Patch ON-OFF | Enable or disable patch calculation to save CPU |
| Patch Comment | Display a comment inside the patch editor (invisible in control panel) |
| Patch Info Editor | Add help documentation to a patch (Markdown format) |
| Patch On Initialization | Trigger when patch is calculated for the first time |
| Patch On Activation | Trigger when patch is activated (engine start, rack activation) |
| Patch On DeActivation | Trigger when patch is about to be deactivated |
| Patch Current Patch Number | Get the patch's position number within its rack |
| Patch Current Rack Number | Get the rack's position number within the workspace |
| Patch Password Protect | Protect patch editor with a password |
| Patch Send Internal Message | Send internal messages to Usine for dynamic patch creation |
Manage polyphonic voices in sub-patches.
| Module | Description |
|---|---|
| Poly Voice Dispatcher MIDI | Dispatch MIDI events to polyphonic voices (oldest-voice stealing, monophonic mode) |
| Poly Current Voice Number | Get the current voice number in a polyphonic sub-patch |
| Poly Array Value | Get the nth element of an array based on current voice number |
| Poly Sub-Patch Polyphony | Get the polyphony count of the current sub-patch |
version 7.0.250121
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