Re: Musical note recognition ?

From: James Rogers (
Date: Tue May 23 2000 - 11:58:48 MDT

On Tue, 23 May 2000, wrote:
> I saw a feature on the TV a few years back about a new digital keyboard.
> It had one fairly amazing feature, that being an input mike that the user
> could hum or sing into and the keyboard would recognise the note and play it
> using the currently selected instrument sound.
> I have never seen or heard of it since and don't know if it ever made the
> production line. I have surfed far and wide but cannot find any info on the
> web.
> Has anyone else heard of it, or even better, know where to get some
> software to do the same thing ?.

You are describing a pitch-to-MIDI converter, devices that have been
around for a long time. Basically, it takes a sound source and attempts
to quantize it to one or more pitches based on a spectral analysis. This
pitch data is sent out in MIDI Note-On/Note-Off bytes which virtually
every electronic instrument in existence can understand to some extent.
(And for the analog purists, the MIDI could be converted to a CV if
needed.) This is fundamentally a data format conversion.

You can either purchase a dedicated box to do this (should be relatively
cheap), or you can use software such as CSound.

-James Rogers

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