SONAR sends a standard "all notes off" MIDI message to synths when playback stops while notes are sounding. Unfortunately there are a few synths that do not understand this message and you can get stuck notes.
In X2 we keep track of sounding notes and additionally send individual note offs when playback stops. So if you had a synth with this problem it should be addressed in X2.

Noel Borthwick [Cakewalk
]

SONAR sends a standard "all notes off" MIDI message to synths when playback stops while notes are sounding. Unfortunately there are a few synths that do not understand this message and you can get stuck notes.
In X2 we keep track of sounding notes and additionally send individual note offs when playback stops. So if you had a synth with this problem it should be addressed in X2.

now THAT is one smart improvement...!