Thanks everybody for the feedbacks, hopefully soon I'll be posting another piece using two arms and no stand.

@Max: Sure, so...

I actually don't trigger any sound nor pre-recorded sound. All the sonic material you hear is the only muscle sound processed in real time.

By "muscle sounds" I mean the voluntary contractions of arm muscles.

It's a phenomenon known as MMG mechanical myography, namely the vibration of muscle fibres, which is being currently explored in biomedical computing.

I use the MMG signal both as a sonic source and parameter controls.

So far I could extract 6 independent binary triggers (fingers) and 2 moving events (overall continuous average and max value).

There's still a lot of work to do (I'm looking into neural networks to improve the feature extraction), but it's real fun and intuitive to play with it.

I've got a paper in the pipeline which will describe the development.

Best,

Hi Marco,

can you describe/do you understand the biophysical process that
triggers your sound?
looks scary and sounds great imho

regards,
max
Am 21.02.2011 um 15:05 schrieb Andy Farnell:

>
> Very interesting low frequencies from the muscles.
> Glad to hear this at last Marco,
> thanks for posting the vid.