s3g-dsp

Bus Mixing / Routing

Bus tools treat a wide REAPER track as a collection of fixed-size source blocks. They mix or validate those blocks without assuming that the channels form an ambisonic field.

Workflow

  1. Choose Group Matrix, Mixer Node Bus, or Passthrough Test, then configure the REAPER track width, source-block size, and plugin pins.
  2. Route the result to the main speakers, a direct panner, a stereo or quad fold-down, or the intended downstream bus, then begin playback.
  3. Route complete blocks with matrix crosspoints, shape their levels with the node cursor, or isolate lanes with Passthrough Test.
  4. Verify block boundaries and channel identity before automating routes or node motion.
  5. Use an ambisonic bus processor instead when every source block is a complete ACN/SN3D field.

Group Matrix

Group Matrix 32/64 routes complete source blocks through a matrix. The 32-channel build supports stereo, 4-channel, and 8-channel groups; the 64-channel build supports 4-channel, 8-channel, and 16-channel groups. Every crosspoint moves the selected block together.

Group Matrix 64 with a dense route ceiling and an active moving pattern inside it.

Mixer Node Bus

Mixer Node Bus 128 represents source blocks as nodes around a movable cursor. Node radius, focus, influence, and position turn cursor motion into coordinated source gains, providing a relationship-based alternative to a conventional matrix.

Mixer Node Bus 128 with three spaced, overlapping nodes using different speaker geometries.

Routing Diagnostics

Passthrough Test 24ch is a fixed-width signal-path check for REAPER pin assignments. Insert it before a more complex processor when a 24-channel chain appears to lose, swap, or bypass lanes, then verify each channel independently.

When every block is a complete third-order ACN/SN3D field, use Ambi Field / Bus Effects so all sixteen channels in each field remain locked.