[mixaudio]

Sorry, I didn't include my system details.

G4 dual 1Ghz , 1Gb RAM, OS 10.2.8
PT 6.1.1 with Digi 001 hardware
MOTU Express XT hooked to gPort serial adapter

By the way, I just made the following test. New session, no audio or MIDI tracks. Created one MIDI track and recorded 10 bars with some piano notes and sustain pedal events, nothing too dense. Then selected the 10 bar and repeated it 200 times in the same track. Then tryed to click and drag to resize a note and it took around 6 or 7 seconds for the note lenght to be updated. While this was happening the Mac icon that appears when something is being processed was showing (that round multicolor revolving thing) and even when the note had been resized and the revolving thing had dissapeared, it came back 2 more times until the "trimming tool" icon finaly changed again to its normal state. All this took almost 20 seconds to complete and during that time I couldn't select or do anything else in other tracks as the tool icon was still in "trimming mode".

Then erased the 200 repeats and tryed duplicating the track 50 times. Again, very slow response when trimming a single note. Then, got rid of all the sustain pedal events on all tracks (I thought maybe the controller events could cause the problem). Same results. Finally, put back the sustain events and got rid of the notes this time. Same thing. Seems like any type of MIDI event in "more dense than usual" quantities will cause this.

Is this a normal behavior in the MIDI implementation in ProTools???

Is there any workaround to lower it or could I have a misconfiguration problem?

Peace for everyone.

Rodolfo Fernandez