Pedro López-Cabanillas

I am not sure to understand your comment. What is different in Windows? The following observations are exactly the same in Linux and Windows: Gain in qsynth has different limits...

Then, it is confirmed that this is not a specific issue of qsynth for Windows. All qsynth versions share the same limits. As a workaround, you may use the command...

I'm the guy who build and package qsynth for Windows, and just wanted to check if your problem was exclusively for the Windows version or not. You put "Windows" in...

I know that 2.0 has been the upper limit in qsynth's gain for a long, long time, but: why?

I think that it was this commit: 101e6bc on Jul 14, 2004, "only" 17 years and 6 months ago. :birthday:

This is the behavior of fluidsynth 1. If you build qsynth with fluidsynth 2 the behavior has changed: now fluidsynth doesn't play neither the first dropped file nor the next....

It is even easier: qsynth/fluidsynth may use pulseaudio instead of jack. Connect your MIDI keyboard first, and then...  With a buffer size of 1323 the latency is about 30...