[sdiy] STM32 processor

[Eric Brombaugh]

On 09/15/2011 10:19 AM, Lanterman, Aaron wrote:
> On Sep 15, 2011, at 8:38 AM, Colin f wrote:
>
>> The dual 12-bit DACs make it especially useful for controlling analogue
>> devices.
>
> Any feel for how good these DACs would be at generating audio? Any "gotchas?" (This sort of relates to earlier discussion about the 12-bit DACs in the Xmega series)

In an oscillator where the signal is pushing 0dBfs they seem OK - clean 
_sounding_, but probably wouldn't knock anyone's socks off if you put 
them on an AP analyzer. Looking at them on the 'scope they've got about 
a 2us settling time regardless of stepsize, so you'd want to filter the 
output pretty heavily.

For effects, filters, etc I would probably prefer a true audio codec 
though - those need dynamic range, and a 12-bit DAC won't give you 
enough when the signal level isn't maxed out as it is in an oscillator.

Eric