qsynth is a qt fluid synth front end. It's a midi piano program to make sounds.
# emerge qsynth fluid-soundfont
sound fonts are located:
start qsynth as root
- setup > midi tab > midi driver > alsa_seq
- setup > audio tab > audio driver > jack
- setup > soundfonts tab > open > load in /usr/share/sounds/sf2/FluidR3_GM.sf2
restart qsynth as root, connect keyboard via qjackctl connect dialogs, and you're ready to play.
the channels button is where you configure what sound font bank is playing, and on which channel. ie piano channel 1 harpsichord channel 2.
as this is an audio program we wish to enable real time priorities:
#echo "@audio - rtprio 99" >> /etc/security/limits.conf