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Rack Chains
A rack is an ordered list of MIDI devices. MIDI enters at the start of the chain and exits at the end — like pedals on a floor or modules in a DAW chain.
Why chains matter
Each device transforms or routes MIDI:
- Filters pass or block by channel, note range, CC type
- Generative devices (Arp, Euclid, Seed) create new notes
- Pitch devices (Scaler, Transpose, Harmony) reshape pitch
- I/O devices connect to physical ports or clock
TIP
Order matters: a Channel Filter before an Arpeggiator behaves differently than after.
Building a chain
- Main Menu → Racks → pick a rack.
- Empty slots show + — open the device picker.
- Select a device to open its parameter list.
- Hold Select on a device in the grid to drag and reorder.
Parameter editing
Device parameters use the same list UI as LFOs:
- Turn the encoder Encoder — move between rows
- Select — edit value or open side menu
- Side menu → Assign LFO (modulation) or External Mapping (mapping)
INFO
See Device reference for every device type.
Multiple racks
Each project holds up to 8 racks. Route different MIDI streams through different chains (see Router and Dispatch devices).
Devices in a chain
Each rack chain can hold up to 10 devices total. When you open the device picker, types you cannot add right now appear dimmed — the rack may be full, or you already have the maximum of that type.
Duplicate on a device side menu follows the same rules as adding from the picker.
Per-type maximums (one rack)
| Device type | Max in one rack |
|---|---|
| Total devices | 10 |
| MIDI Input / MIDI Output / Clock | 1 each |
| Scaler / Transpose / M2CV | 1 each |
| Euclid | 3 |
| Other types (default) | 4 each |
Category maximums
Device types in the same category share a cap when there is no per-type rule above:
| Category | Max per type in one rack |
|---|---|
| I/O & Clock | 1 |
| Generative | 4 |
| Pitch & Harmony | 4 |
| Filters | 8 |
| Routing | 4 |
| Dynamics | 4 |
| Effects | 4 |
| Utility | 4 |
Per-type rules (for example, only one Clock) override the category default.
If the S32 refuses to add or duplicate a device, see Troubleshooting.