> experimenting with various combinations of values synth.audio-channels and > synth.audio-groups either gets me effects on all channels or none
Seems like you created the Ladspa effects on the Main:L and Main:R ports. Have you tried explicitly specifying the subgroups as described here? https://github.com/FluidSynth/fluidsynth/blob/master/doc/ladspa.md#multi-channel-output Tom _______________________________________________ fluid-dev mailing list fluid-dev@nongnu.org https://lists.nongnu.org/mailman/listinfo/fluid-dev
