Serge Auckland wrote:
Ian Iveson wrote:


The DSP solution would appear to be preferable. However, presumably
there are rounding errors. That is, if I divide every word by a
constant, each result must be rounded to the nearest step, and this
rounding error is not linear wrt the audio signal. I assume there is a
name for this kind of error? How significant is it?


The DSP solutions I'm familiar with operate either floating point or 32
or 48 bit internal which means that when the output is finally reduced
to 16 or 24 bit the errors from the DSP calculations are minimised. I
don't know of a specific name for the errors resulting from DSP operation.



But even if the internal calculation is done with larger resolution, you
still loose one bit of output resolution for every 6db of attenuation.

--
Nick