Hello,
I experienced the same behaviour in Squeeze after a my first
installation. I couldn't play the default score and when I tried to save
it the mscore.real process used 100% of the CPU load. I solved it by
unchecking the Portaudio option from the I/O tab, in the
Preferences menu.
I'm experiencing this bug too, on Wheezy.
Here the output:
$ musescore
Portaudio open stream -1 failed: Invalid device
no audio output found
Portaudio close stream failed: Invalid stream pointer
init audio driver failed
sequencer init failed
2cannot parse 1.0
registerPlugin: add action idx 8
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