Hi,
Some attempts have been made. Never got around to write the needed code.
On 10/12/2014 08:37 PM, Hal Murray wrote:
anders.e.e.wal...@gmail.com said:
Does it matter that the ADC in the sound-card is probably clocked by a
crystal clock that is 50ppm off and has bad ADEV?
You can calibrate the clock on the ADC.
One way is to feed a known reference frequency in on the other channel.
(That's assuming you have a stereo setup and don't need the second channel
for something else.)
Another way is to compare the sample rate with the PC clock. That will
correct for any long term drift but may not track shorter transients.
Many more professional audio interfaces allows you to supply a
word-clock, so synthesizing that from suitable source would provide good
means of adjustment.
48 kHz or multiples is often used.
Cheers,
Magnus
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