[sdiy] Parallel 8 Bit DACS?

[cheater00 .]

Hi Theo,
thanks for your email. It was a nice read.

On Wed, Nov 20, 2013 at 3:35 PM, ezion <ezion67 at gmail.com> wrote:
> </lurk mode>
> Hi Jack
> Don't get your first question completely but you might want to look
> for R2R DA circuits.
>
> As for adding VCA and VCF no magic but a "D" or "AD" type Envelope
> plus VCA/VCF definitely works wonders, even better if you put a
> distortion or wavefolder in front of it.
> But ideally you want this on individual sounds not on the mix.
> For cymbals and high-hat I find just a lonely VCF is usually enough.

Why VCF and not an RC filter?

> A wave folder offers more compression than a traditional distortion.

Interesting - what sounds do you use it on?

> The basic receipt for a wave folder: one 072 opamp, 2xLED and 3x10k resistors.
> hookup:
> Assuming symmetric supply for the opamp.
> R1 from signal input to opamp +
> R2 from signal input to opamp -
> R3 as feedback resistor from opamp - to opamp out.
> The 2 LED anti-parallel from opamp+ to GND
> 10n parallel to the diodes takes of the sharp edge.
> 33p parallel to the feedback resistor is always a good idea.
> The input level sets the amount of drive.
>
> Expect a wide variety of electronic drum sounds from a single acoustic
> drum sample.
> Just me 2 cents
> <lurk mode>
> Groetjes Theo