Export installed pyfluidsynth is actually the low-level ctypes
wrapper (fluidsynth), not the high-level FluidSynth class. The
broken call fluidsynth.FluidSynth() caused silent fallback to
oscillator synth for ALL SoundFont renders. Replace with:
new_fluid_settings / new_fluid_synth / fluid_synth_sfload /
fluid_synth_program_select / fluid_synth_write_s16_stereo.
Also fix synth time advancement: call write_s16_stereo for
silence gaps instead of just advancing a cursor.
3dtours
013465f27a