PO-33 K.O! - how do i change the volume level of an individual sound in a sequence?

either live record the volume change:

1. select the sound you want to change, [sound] + [1-16].
2. press [fx] until you see the 'ton' (tone) controls.
3. press [play] to play the pattern.
4. press and hold [write] and adjust the volume with knob [b], overwriting the existing volume.

or program the change by replacing the individual trigger:

1. select the sound you want to change, [sound] + [1-16].
2. press [write] to enable 'Edt' (edit) mode.
3. press and hold the step [1-16] you want to adjust, until you see 'CPY' (copy).
4. press [fx] until you see the 'ton' (tone) controls.
5. adjust the volume 'VoL' with knob [b] (or any other parameter that you want to change).
6. press the same step again twice (once to remove the old settings, and once to program the new) to replace the trigger with updated volume.