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Created page with "PHYS 210 PROJECTS --> here A Transcriber - My idea is to create a computer program that transcribes what it hears through the microphone. This program could hear somethin..."

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A Transcriber - My idea is to create a computer program that transcribes what it hears through the microphone. This program could hear something and then generate the music notation for what it has heard.

<FONT COLOR=darkgreen> Have you Googled ''LilyPond'' yet? I believe there are various ways to get the Fourier transform (Google that too!) of your microphone signal; the next step would be to analyze this frequency spectrum (perhaps with <tt>python</tt>) and pick out the main peak(s) at frequencies corresponding to notes on the scale. (One challenge would be to shift the reference scale a bit if the instrument happens to be a little off-key.) Then just generate the corresponding ''LilyPond'' input and feed the result to ''LilyPond'' to convert it to sheet music. That would actually be pretty cool! But it's a substantial Project, so you need to get the hardware installed and tested PDQ. ''Caveat:'' check carefully with Google to see if this has already been done; there may be a kit you can buy cheap, which would mean you'd need to design a "value added" improvement, but then you could sell it to the manufacturers! -- </FONT> [[User:Jess|Jess]] 15:25, 20 September 2008 (PDT)

Okay, I've found the website for ''[http://lilypond.org/web/index LilyPond]''. As for the [http://en.wikipedia.org/wiki/Fourier_transform Fourier transform]...I'll have to get my head around that one as I don't think we've been formally introduced.

I am wondering how my program will be able to get a signal from the microphone as I have never done anything quite like that before. But I have downloaded the source code for ''[http://audacity.sourceforge.net/ audacity]'' which is a program that knows how to do that. Perhaps I'll find some clues if I take a good peek inside.

<font color=darkorange>As a suggestion, I would say to work on one instrument, because unless you're able to separate tones through their timbrel qualities, it'll make a transcription either exceedingly cluttered or lacking certain spaces. (ie. If your program looks at only the strong fundamental of a note, it may write off an instrument at a higher tuning [let's say cello and violin] as overtones of the lowest frequencies.)

As well, perhaps a noise gate will be useful for preventing the program from attempting to transcribe fuzz.</font> [[User:S48571087|S48571087]] 22:05, 1 October 2008 (PDT)

Music Transcription - Darry Danzig - Revision history

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