[PD] detect if adc~ is music or speech

[Pedro Lopes]

First of all, I would take it from another angle:

<this is one possible way, out of zillions>
if it is speech or not. Thus if the speech recognizer has X % of
recogniztion rate, you inherit that percentage. Now you heavily depend on
the recognizer, some recognizers like teh default windows try to always
match the input to some string, thus they are a bit of garbage in academic
terms, what you need is a strong open recognizer that can tell you how %
similar the sentence is to a target sentence in database.

Why do I suggest this angle?
- Cause' I don't wanna think "what is music". Speech is a language, it is
defined, it easy structured. Music? Noise is music, drone is music, ambient
can be non rhythmical, what about an a Capella singing? Will it be music?
and all those inherited philosophical issues. Furthermore, if you need more
help maybe explaining the context will aid us, because if you only care for
certain "music" can be easier. ALSO: if you have access the audio data, you
can always extract (filter) the music.

</this is one possible way, out of zillions>

best,
pedro


On Mon, Feb 7, 2011 at 5:43 PM, patrick <puredata at 11h11.com> wrote:

> would it be possible to detect if the incoming audio is music or speech? i
> guess it's very hard, but i was thinking about some methods:
>
> using some kind of frequency detection
> using bonk (if the tempo is stable = music)
> env~ (most music are compressed nowadays)
> training a voice (using neural network?!?)
>
>
> From the author of aubio:
> Use a few low level features, such as energy of low and high frequencies
> bands, spectral spread. In a second step, these approaches are often refined
> using machine learning techniques bayesian networks or support vector
> machines.
>
> See for instance these papers:
> http://cobweb.ecn.purdue.edu/~malcolm/interval/1996-085/
> http://www.aclweb.org/anthology/O/O08/O08-1015.pdf
> http://www.hindawi.com/journals/asp/2009/628570.html
>
> i would like to achieve > 90% of accuracy if possible. any suggestions are
> welcome!
>
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-- 
Pedro Lopes (MSc)
contact: pedro.lopes at ist.utl.pt
website: http://web.ist.utl.pt/Pedro.Lopes /
http://pedrolopesresearch.wordpress.com/ | http://twitter.com/plopesresearch
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