JX10 monophonic sounds do not retrigger envelope
When playing a monophonic sound in JX10 the envelopes are only triggered by the first held note. This is a desirable mode for some sounds but not necessarily all sounds. It can prove challenging to play monophonic sounds due to the envelope decaying the sound and hence subsequent notes being (sometimes very) quiet.
It would be advantageous to have more monophonic modes or another "Legato" parameter which allows selection of retrigger of monophonic notes.