How to use drum plugin, for example SsdSampler, it has 24 output channels

[badd9yang]

for SsdSampler, it has 24output channels. However, only two tracks can be rendered, and only the audio of the first two tracks can be generated.

[DBraun]

Have you tried calling synth.open_editor() to change some setting? It may also be necessary to try synth.can_set_bus and synth.set_bus afterward.