while testing program change and zs3 i found an issue on zynaddsubfx and single layer play option:
if more than a zasfx layer is present on snapshot, the one with multiple instruments (xmz, to be precise)
interferes with rest of zyn presets, giving unwanted results (wrong sounds or totally mute presets)
i attached my snapshot and relative zyn xmz preset.
Simply try to reproduce error by playing in single layer mode “zy#1 arpeggio6”, then trying other layers until switching to “ZY#4 LEVIATANO”, resulting muted. Then returning back to Arpeggio6, with wrong sound.
On layer chain there is another zyn preset, muted too, after choosing xmz.
Note: this is not an error created by newcoming sublayer program change stuff.