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Why does the CPU max out when I try to use Tascam US-122L with Mainstage?

310 Views 5 Replies Latest reply: Jul 21, 2012 11:42 AM by lifenoise RSS
alexl102 Calculating status...
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Jul 21, 2012 10:36 AM

So, I bought a Tascam US-122L to connect my MIDI keyboard to my mac, but unfortunately the mac won't recognise it as a midi device. Anyway, to get round that, I connected the MIDI keyboard directly to the mac using a MIDI->USB cable, and then plugged the Tascam in as well. When I loaded Mainstage 2, I changed Mainstage's 'Audio Out' setting to the US-122L (I want to use it for a gig and the standard headphone port on the mac doesn't output enough). Immediately the CPU usage went to red and stayed there. I played for a bit and it seemed fine other than the CPU being maxed out, but after about 20 minutes I got an error message saying 'You need to shut your computer down'.

 

What did I do wrong, and how can I solve this issue?

MacBook Pro

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