VOLUME knob
| Control | Function | LED |
|---|---|---|
| Turn (page 1, default) | Output gain, headphone + master (default 75%) | VU meter of the master, scaled by gain |
| Press, then turn (page 2) | Input gain, AUX (default 75%) | blue (0%) to red (100%) |
| Press twice, then turn (page 3) | Headphone feed: left towards the AUX input on its own, right back to the master out (default: the master out) | white (master) to green (input) |
| SHIFT + turn | Input/loop mix: input only to looper only | green (input) to purple (loop) |
| SHIFT + press | Resets the mix: the loop only while there is one, otherwise the input only |
Turning moves the gains 2% per detent, the mix (SHIFT + turn) 4% and the headphone feed 1%. Pressing again on page 3 returns to page 1. Picking a page blinks its number in white: once for page 1, twice for 2, and so on. Whether a press is SHIFT + press is decided when it goes down, so letting go of CHOMPI first doesn’t also change the page. The mix starts on the input only, jumps to the loop only when a recording finishes and back to the input only when the loop is erased; SHIFT + press puts it back there. The punch-in FX come after this mix, so they act on the input as well as the loop.
Headphone feed (page 3): the master out always carries the full signal. Turned left, the headphones carry the AUX input on its own instead, after input gain and VOLUME: no loop, no effects, no mix, no compressor. Use it when the master goes to a PA, mixer or recorder and the headphones are your monitor; with headphones alone, leave it at the master. It’s back on the master at every power-on.
(Page 3 used to be the master compressor, which has its own key now, see Master compressor. The headphone feed used to be on the mode switch, then on page 4. Mono and the battery check moved to the settings page.)