I want to use Reason to play a Casio keyboard with reason sounds and rhytmhs. I seperated MIDI channels for chords and melody, I run some devices with matrix, but what I can't do is, that chords would sound as long until I press a new key on my keyboard.

For example: I play chord on my Casio (left hand), Malstrom plays it with its current sound, matrix tells Malstrom the rhytmic pattern it should play, NN-19 plays melody (right hand), but the problem is, when I stop playing left hand, matrix stops playing.Is it possible to make like the original Casio accompainment (which sound sucks), that sound continues playing until I press the next chord (left hand)?

I even found VST MIDILatch, which does exactly that, but the problem is, that it holds than all sounds from Casio, but I want it to hold only channels 6-9, which are chords (accompainment)

Thanks for eventual advices

best

Teo