cesco12342000
Mon, 18 Dec 2006 13:05:38 -0800
> While using a sound card with a wide frequency response, and using high > sampling rates, might intuitively appear to be a good idea, I'd suggest > this is not likely to be the case. > Thoughts? What am I missing in this logic? my thoughts (not veryfied) : You should use the max. sample rate the card is capable of. Normally, this is 48khz. The reason behind is microsofts audio resampler. i.e. if you request 11025 samplerate, the soundcard may still be working at 48khz, and the driver resamples the audio to 11025. Now, the MS resampler is not that good, and may produce quite some wow and flutter. This is no issue listening to music, etc, but it does heavily affect some modulation types. Other possible rates are 24khz, 12khz, 8khz, etc. Those can be directly derived from 48khz without passing the windows resampler.