Re: Theremin sound

by Michael Gogins :: Rate this Message:

The Theremin sound is produced by heterodyning. There is a fixed frequency
radio-frequency oscillator, and a variable frequency radio-frequency
oscillator controlled by one hand. The audio frequency beats between the two
RF oscillators (sum and difference tones) are heard. In audio signal
processing terms, perhaps this could be modeled by amplitude modulation with
some waveshaping distortion, or simply by a sine oscillator passed through
waveshaping distortion.

It would also be very easy to write a new opcode in C or C++ with
high-frequency oscillators (based on difference equations) to model the
Theremin directly.

Regards,
Mike

----- Original Message -----
From: "Mahound" <ilzogoiby@...>
To: <csound@...>
Sent: Wednesday, January 16, 2008 4:40 AM
Subject: [Csnd] Theremin sound

>
> Hello.
> Does anybody have information about the waveform produced by the Theremin?
> I
> tried to google, but some places say it's a sinewave, and some others that
> it's not exactly it (and it in fact sounds richer). However, I cannot find
> any real analysis of the timbre of this instrument (weird...). Aren't
> there
> any csound orchestras for that?
>
> Cheers,
>
> Pedro
> --
> View this message in context:
> http://www.nabble.com/Theremin-sound-tp14875977p14875977.html
> Sent from the Csound - General mailing list archive at Nabble.com.
>
>
>
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