[sdiy] frequency counter

[cheater cheater]

I'm not sure if this has been answered before, but what bit depth *do*
you need exactly in pitch CVs?

Can a chain of AD->uC->DA inserted after the expo help with high
frequency performance, by introducing correction offsets?

D.

On Sun, Oct 25, 2009 at 18:29, Antti Huovilainen <ajhuovil at cc.hut.fi> wrote:
> On Sun, 25 Oct 2009, Tom Wiltshire wrote:
>
>> On 25 Oct 2009, at 12:34, Antti Huovilainen wrote:
>>
>>> Funny... I get almost the same feeling when someone wants to abuse audio
>>> DAC for multiple CV outputs ;)
>>
>> I wasn't trying to abuse it. I rather hoped it might work, as it would
>> have been a nice, simple solution. Unfortunately it didn't. (Hey, just add
>> it to
>
> Real 16 bit DACs are expensive. Fortunately, you don't really need true 16
> bit accuracy for modulation sources - only high enough resolution and
> reasonable accuracy. Nobody is going to notice if your envelope or LFO is
> off by 0.1%. So, use a cheap 12 bit DAC (MCP6922 for example), follow it
> with an RC filter to remove any stepping and be happy. It should be good
> enough for everything other than main tuning CV.
>
> Antti
>
> "No boom today. Boom tomorrow. There's always a boom tomorrow"
>  -- Lt. Cmdr. Ivanova
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