To place sound B in the grid, you have to first select it with “sound”+B. You can live-record any sounds into the sequence, but only grid record the current selection.
Tweaking sounds works a bit differently on different PO’s.
On the PO-20 you have two options:
- Record into the sequence live as it’s playing (hold record and press notes / turn knobs)
- Tweak an individual note by turning on record mode and holding down a step button while tweaking the knobs (I forget whether the sequencer has to be stopped to do this)
The PO-20 does not let you tweak parameters when you’re plugging in steps in the grid (sequencer stopped). The original PO-12 let you do this; they changed behavior for the “second generation” POs