Macbook 1,83 Quatafire 610 Logic Pro Midi Problem

Question

I use an Esi Quatafire 610 with my Macbook (1,83 Intel Dual Core) and Logic Pro 7.2.3. Since
the last Systemupdate (10.4.10) and Securityupdates, the Midi-Interface of the Quatafire have
"hang ons" at Port 1. Port 2 seems to be ok. I tried the Quatafire with my G5 (2,0 Dual) and
don´t have any Problem here. So the Quatafire itsself seems to be ok.
I also installed the Audio-Update for Intel machines but this was no solution. Does anyone
know something about this problem? The Quatafire works with Apple Core-Midi drivers.

Answer 1

So yes I am playing on the virtual instruments.  No separate audio device.  I have external speakers plugged into my computer so when I play my keyboard through Logic, sound comes out of my computer external speakers and not the keyboard speakers(I turn the keyboard volume off).  The problem I described happens for the various virtual instruments I have tried, strings, woodwinds, pianos etc.  In the Logic audio settings it says
Output Device:  Built in Output
Input Device:  Built in Microphone
I/O Buffer Size:  256 samples
When I say the keyboard stops, I mean no sound comes out of my computer speakers for a few seconds.  It is as if someone turns the keyboard off for a few seconds and then back on.  This happens in Logic when Im trying out different virtual instruments.  You are correct when saying it happens only when Logic is running whether I am recording MIDI or just playing and NOT recording.  I hope that makes sense.  It wouldn't be such a huge problem, but it happens so often it makes it hard to play or record something thats longer than 10 seconds.  Thanks for the help.