modulator targeting sample offset doesn't play in Polyphone

[mrbumpy409]

I thought I had reported this bug a while back on the forum already, but I couldn't find it, so I am reporting it here.

Any modulator targeting sample offset doesn't play in Polyphone, but does work correctly in players such as FluidSynth.

Steps to Reproduce

1. Download and open the following SoundFont in Polyphone: sample-offset-test.zip
2. Play each of the presets, using different velocities. Each preset uses a velocity→sample start offset modulator at the instrument level so that the amount of sample offset changes with velocity. This should change the sound of the note start, making it brighter at higher velocities.

Result

Polyphone ignores the velocity→sample start offset modulator, so no change to tone is heard when playing different velocities.

Expected Result

Notes should start brighter at higher velocites. To compare, Fluidsynth and current BASSMIDI both play this SoundFont correctly.