Ok, your EWI controls the _expression_ controller CC11. Additionally the value for noteon velocity is taken from that controller. For the first note you're playing the _expression_ value is pretty low resulting in a very low noteon velocity. Low _expression_ and low velocity gives a very quiet note:
B0 0B 16
90 03 16
For the next note CC11 is higher again:
B0 0B 3E
90 01 3E
Dont know how other EWIs handle noteon velocity. However, you could try:
- assigning noteon velocity to a fixed value (e.g. 64), since you're controlling the volume via CC11 anyway, or
- this might be an issue with the very dynamic volume processing introduced in fluidsynth 1.0.9. In this case it might help to test it with fluidsynth 1.0.8 or you start fluidsynth with the
-o synth.volenv=compliant option (since this is a new feature you'll have to checkout
this branch and build fluidsynth your own)