[Lowfer] Re: Phasing Exciter Question

[Alberto di Bene]

"John Davis" <longwave@mindspring.com> wrote:

> Alberto,
> 
> Would you be able to account for the possible time differences between the
> channels that appear to be inherent in some sound cards?

This is not so straightforward, as a (presumably) fixed time differences 
between the two channels
of course translates into a phase difference variable with the 
frequency, but it can be done. This
will require a redesign of the software NCO, which, as it is now, has 
two outputs with fixed 90 degrees
phase difference.
The problem is that I don't have such a bad behaved sound card, so I 
must rely on someone who
does for testing. Do you have any data on that time difference ? Is that 
fixed, or is it depending
on the sampling rate ? How much variation there is among different brands ?

73  Alberto  I2PHD