Vocoder
Vocoder: main parameter page.
A ten-band channel vocoder after the Roland VP-330: the track's audio (a voice) shapes a carrier, built in or external. The output is mono on both channels.
Access
An effect on a track: select the track, press FX2, and pick VOCODER.
It runs on FX2 of tracks 2, 3, 6 and 7 only. On tracks 1, 4, 5 and 8,
and on any FX1 slot, it passes audio through untouched. Two VOCODERs per
DSP core play (tracks 1-4 share one core, 5-8 the other); a third on a core
stays dry instead of overrunning it. Not in an official remix; build the
test remix vocoder.
Heard on a MKII on 4-5 Oct 2026, by ear: it plays and is intelligible, and one or two per core ran clean. Left-only click bursts on T1 were measured, which is why T1 and T5 are excluded.
FX2 SETUP with VOCODER selected: MODE INT.
Operation
- MODE INT: the carrier is built in, two sawtooths an octave apart at NOTE. Turn NOTE, or parameter-lock it on the steps, and the vocoded voice plays a melody. Play a voice, sample or live input through a THRU machine.
- MODE EXT: the carrier is the track's right channel, for example a THRU track with the voice on input A and a synth on input B. The modulator is the left channel; in INT it is left and right averaged.
- CONS passes the voice above 4 kHz, as the VP-330's high-consonant circuit does.
- A saved NOTE above C6 plays C6.
- The VP-330's ensemble chorus is not modelled.
Parameters
| Page | Knob | Range | What it does |
|---|---|---|---|
| 1 | NOTE | C1..C6 | the built-in carrier's pitch; default C3 |
| 1 | CONS | 0-127 | consonants: the voice above 4 kHz passed through; default 48 |
| 1 | DRY | 0-127 | the dry voice mixed in; default 0 |
| 1 | LEVL | 0-127 | output level; 127 is unity, default 100 |
| 2 | MODE | INT, EXT | the carrier |
Screen Reference
Vocoder: effect selection and setup parameters.
Status: on hardware: Ignorato's MKII, 4-5 Oct 2026, by ear: OCTABAM12 at the earlier positions T1 T2 T5 T6, stable on all eight tracks; this build at T2 T3 T6 T7 not flashed; those positions heard clean on the 0.2 code only (OCTABAM20, branch vocoder-0.2 at f83463c8).
Module facts (developers)
Ten-band vocoder after the Roland VP-330: the track's voice, a built-in carrier at NOTE or input B. FX2 of tracks 2, 3, 6 and 7 only.
| Detail | Value |
|---|---|
| Author | Ignorato |
| Category | Effects: on a track |
| Kind | dsp_effect |
| Test status | on hardware: Ignorato's MKII, 4-5 Oct 2026, by ear: OCTABAM12 at the earlier positions T1 T2 T5 T6, stable on all eight tracks; this build at T2 T3 T6 T7 not flashed; those positions heard clean on the 0.2 code only (OCTABAM20, branch vocoder-0.2 at f83463c8) |
| FX2 ID | 0x1a |
| Parameters | NOTE@0, CONS@1, DRY@2, LEVL@3, MODE@6 |
| Included in | no official remix |
On GitHub: https://github.com/sambanks/octabam/blob/main/modules/vocoder/README.md