[sdiy] Capstone: Modular Analog Synth

[Andre Majorel]

On 2006-09-25 12:03 -0400, Charles Bisaillon wrote:

> I've come up with the following specifications for our project.
> Can someone please tell me if I'm on the right track, or if I
> should change something.
> 
> Power Supply: +/- 15 V
> Pitch Control: 1 Volt / Octave
> Tuning: Middle C = 440 Hz
> Control Voltages: 0-10 V

I've lost context so pardon me if this does not apply to your
application but :

A workable tuning standard for VCOs is 5 V = 440 Hz. That's
convenient because it joins two commonly available references. It
gives you 0 V = 13.7 Hz and +10 V = 14.1 kHz.

For a frequency range centred around 20 Hz - 20 kHz, you'd have to
specify 5 V = 632.45 Hz (or 440 Hz = 4.4765 V), giving you 0 V =
19.8 Hz and 10 V = 20.2 kHz.

> Audio Signal Level: +/- 5 V

Yes as long as you can deal with hotter signals (like 20 Vpp) as
VCFs can have gains greater than 1.

-- 
André Majorel <URL:http://www.teaser.fr/~amajorel/>
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