[sdiy] midi 2 cv

[harrybissell]

Yes... you could do that, but then you no longer have a (simple) one to one
correspondance between midi note number and output...  You'd need to
use a lookup table or something to get the correct DAC code.  The Prophet
V (for instance) used a 12 bit DAC and a computer generated linearization
table to get better tracking...

H^) harry

MAKoot MAKoot wrote:

> > ok, somethings to understand,
> > By BITRATE I assume you mean the refresh of the DACs?
> > the faster they update, in theory the less notes/data they will miss, but
> > given MIDI isn't that fast, this is only valid to a point.
>
> Yes your right, I'm sorry I meant the ammount of bit-resolution of coarse,
> not bitrate. I accidently took the wrong word..
>
> > no, you're right, BUT the catch is that DACs arent that linear or stable,
> > for example a typical 8Bit DAC will have a linearity of 1LSB, this means
> > the
> > value could change by 1LSB with each change in value..
> > If you goto something like a 16Bit DAC the same applies, but becuase we're
> > talking about 16Bits (we move the data we want into the top 7 bits) then
> > error (1LSB) is much much smaller (256 times smaller)...
>
> So I guess with higher precision DAC's you will get more precise CV-outs?
> But instead of shifting can't you just cover a key over more bits, wouldn't
> that work aswell?, because that would still mean those lower bits (LSB´s)
> wouldn't just been "thrown away". Would that work?
>
> Michiel
>
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