midi2cv (was: quantizer question)

[Roman Sowa]

>I haven't found a 16 bit convertor suitable for this, those my normal
>supplier (Maplin) stocks all seem to have a serial interface, and cost
a
l>ot more than $10. 
>What 16 bit part are you planning to use ?

AD1851 is for about $10 and yes, it has a serial interface, so what? I
prefer serial.

>Maybe the DACs are not inherently noisy, what I meant was that, for
>example, unless the circuitry following a 16 bit DAC has over 96 db
SNR,
>some of the LSBs of resolution will be lost.

it's ok for me to loose few LSBs and get a decent DAC. 16-bits is
sometimes
cheeper than 12-bits due to their designation. 16-bits are widely used
in
commercial electronics and must be cheap and available, while industrial
precise 12-bits may cost a fortune (BurrBrown makes 12-bit DACs even for
$200 a piece!)

>While we're on the subject, given that you might want to generate pitch
>bend / glide etc on a DAC output cv, does anyone know what DAC
>resolution is required versus frequency range to fool a human ear into
>hearing a continuously variable pitch instead of stepping ?

I say 3 cents is more than enough.
(33_steps_per_semitone)*12*(8_octaves) = 3168 which is 12 bits

any other calls?

Roman


Colin f

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Roman Sowa, Wizja TV
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