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Paul Coccoli wrote:

quoted text
> On Fri, Apr 8, 2011 at 7:46 AM, Dan Muresan  wrote:

>>> There are a few these days, but the only one I have ever used is

>>> aubionotes, from the aubio package.

>>>

>>> http://aubio.org/aubionotes.html

>> Thanks. I didn't know about aubio, though apparently it has been

>> around for ages.

>>

>> Setting up aubionotes is very easy. Unfortunately, it doesn't work

>> quite well enough for me (pitch detection is error-prone). But it is

>> probably possible to fine-tune the detection parameters by going to

>> libaubio directly (aubionotes doesn't have too many options to tweak,

>> and the ones available aren't documented).

>>

>> How did you use aubionotes? Any special tips?

>

> As usual, I didn't do anything serious with it.  I planned on writing

> an that would quantize incoming midi notes to a specified key, but

> never did.  Though I imagine such a thing must exist (maybe the pd

> suggestion would be a better choice).

>

> What type of signal did you run to it?  You could try a compressor in

> front of it; I think that helped.  I can't remember if filtering

> helped.  Maybe a bandpass tuned to your expected input, or a

> combination of high- and lowpass?

While I wasn't trying to do this in real time, I tried a number of apps

that were supposed to be able translate audio to music notation. I

second the bandpass filter idea, or other filtering, to clean up the

frequency range before the pitch recognition phase. I don't know what

impact that might have on RT performance, though.
--

David

gnome@hawaii.rr.com

authenticity, honesty, community

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