I did ask a similar type of question related to Cubase in its User Forum, and the answer was that better to look for a an other editor, like SoundDiver or MidiQuest. For Matrix-1000, you can find even dedicated editors, and, there is even a rare Access Matrix-1000 hardware editor!
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Re: Using Matrix 1000 with Sonar / Cakewalk
2007-08-16 by envia94