Re: [Gumstix-users] Pd on Overo Airstorm - audio problems

[Tim R. <gu...@ec...>]

further to this - (Duncan and I are working together)

When a usb audio interface is used, the audio works perfectly in puredata on
airstorm-linaro for playback and capture

There is some kind of incompatibility between the overo audio driver and pd.
The overo audio driver is working fine with aplay.

We are using alsa oss emulation as alsa itself isn't working with pd
although pd supports alsa.
With oss emulation, the audio has artefacts and pd is using a very large
amount of cpu (~80%). 
If the 'block size' is increased (i.e. the amount of audio samples being
processed at a time) cpu usage decreases drastically (to <%2) and the audio
output becomes smooth (although at the wrong pitch). audio input however is
still distorted/ granulated.

I wonder is anyone knows what the difference is with the TPS65950 audio
driver, whether it can be reset or reconfigured in some way...

Thanks.,

Tim

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