Slightly Distorted Playback from Piano Lessons

Hello:
I am using Garageband as part of iLife '09 on an iMac 20" with an M-Audio Keystation Pro 88 MIDI controller. I have a Tascam FireOne audio interface that the sound goes through, but this problem has also happened with the built-in CoreAudio driver before I purchased the interface.
I'm mainly using it at the moment for working through the Piano Lessons I've downloaded from the Lessons site. Whenever I play the piano, it's tolerable and plays fine, but I notice that the sounds can become slightly distorted sometimes. Sometimes, for instance, I would press one of the keys and it would produce a stuttering sound. Other times, I would hold down a key and it would play a different octave of the chosen key.
Any suggestions yoiu might have for improving the audio quality would be appreciated; thanks very much.
Best,
Velanche

manfred_kraft wrote:
Hi,
It happens in all players, even with audio-editors and with all output methods. I tried toggling each mute and dim button, without result. Maybe it's a problem with my PCI-slot, because the 1212m shares IRW with the onboard graphics and the USB controller. shouldn't be a problem today, but who knows. I've tried everything and i think that i will send back the card and buy a firewire based interface.
Thanks for your help anyway & greetings
Manfred
When sound device is sharing IRQ with onboard graphics --> trouble if you have not disabled the onboard graphics. This can be improved a bit by setting the PCI latency (graphics --> 32, sound --> 64-128).
!! 1212M is quite power hungry too --> is your PSU >300W?
If you're under 300$ budged --> Presonus has FireBox on sale @ 299$ (~250$ street price, and it's >500$ device).
jutapa

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Slightly Distorted Playback from Piano Lessons

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