• LOOP and THRU: CUST source. Push knob A (SRC) to open CUSTOM SOURCE, the same dialog as AUDIO ROUTING: pick any tracks, the audio inputs, the send effects (DL RV CH) and USB in. The loop / THRU plays their sum; MIX fades the chosen tracks, inputs and USB (send effects are recorded but stay audible). Saved with the sound.
• LOOP: USB source (USB in alone, at its USB TO MAIN level). MAIN now includes USB in.
• LOOP: MIX now fades USB in's direct sound when the loop records USB or MAIN, and the loop plays it at the same level.
• LOOP: SRC p-locks change what the loop records, and the SRC knob shows the source while you lock it or hold [SYN].
• LOOP: with SRC OFF the loop keeps its place in the pattern, so a source turned back on records on the beat.
• LOOP: hold [FUNC] while turning LEN to step through 4, 8, 16, 32, 48 … 128 steps.
• LOOP: END below STRT plays the window reversed (FWD plays backwards, REV forwards).
• Fixed: linking STRT and END while a loop played left the playhead out of step with the waveform.