Path: utzoo!attcan!uunet!husc6!uwvax!rutgers!netnews.upenn.edu!eniac.seas.upenn.edu!ranjit
From: ranjit@eniac.seas.upenn.edu (Ranjit Bhatnagar)
Newsgroups: comp.sys.amiga.tech
Subject: Re: 2 More Questions
Message-ID: <5110@netnews.upenn.edu>
Date: 11 Sep 88 05:37:45 GMT
References: <8809071942.AA05026@cory.Berkeley.EDU> <6112@dayton.UUCP>
Sender: news@netnews.upenn.edu
Reply-To: ranjit@eniac.seas.upenn.edu.UUCP (Ranjit Bhatnagar)
Organization: University of Pennsylvania
Lines: 34

In article <6112@dayton.UUCP> joe@dayton.UUCP (Joseph P. Larson) writes:
>Oh, but what an interesting topic for a Ph.D thesis!  Just think how you
>could start out -- recognizing a single note.  Not too tough -- you ought

As a matter of fact, it HAS been the topic for MANY PhD theses, and it's
still not solved!  This is a HARD problem.

But just because a problem is unsolved, doesn't mean it can't be exploited
commercially.  Pitch-to-MIDI converters have existed for sale for many
years; they apparently work pretty well on fairly pure tones like flute
or voice (unaccompanied!).  

A company in CA recently started selling a gadget with a voice-pitch
detector, synthesiser hardware, and a bit of brains to allow it to
do fairly nice sounding improvisation.  In other words, you sing into
this box, and it fixes up your voice and sings along with you.

So - on this subject, does anyone out there have some fast FFT code
(C or 68K assembly) that they would be willing to share?  Fixed-point
would be best...  if it's short, I bet nobody would mind if you posted
it here, and then we could all go and putter around with pitch-recognition
for a while.  (Assuming I can scrape up the cash for a sampler.)

Heck, THIS belongs in c.s.amiga, but: I would like to hear opinions on the 
various brands of sound samplers available.  I can think of Perfect Sound
and Future Sound, and I know there's at least one more.  Please MAIL me
comments on the hardware and software of these gadgets.

	-Ranjit


		One season I was born/ Fell down like an acorn
		I am the only tree/    And everybody leaves
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