[Lowfer] Re: Sound card measurements

[Alberto di Bene]

"Lyle Koehler" <lyle@mlecmn.net> wrote:

> I managed to find an analog hardware solution to compensate for the
> time delay that I had measured between the left and right channel 
> inputs of my SoundBlaster Live card. The solution is an "all-pass" 
> filter,
> [...]

 Lyle,
   excellent news! And thanks for having done such research and tests.
In the meantime I am still more and more convinced that also a pure
software correction is possible. Let me a few more days to do some
checks. I will have to simulate the delay in one of the channels using
a simple hardware network, nothing more than a couple resistors and
capacitors, and then try to compensate for it in software.
Of course I am aware of the need of a variable phase compensation
depending of the frequency tuned in, as what is constant seems to be
the time delay.

You could post the schematic of your circuit in the photos section of
the soft_radio group, e.g. as a GIF file of 800 x 600 pixels. The
Excel spreadsheet could also be posted to the files section of that
same group.

Thanks again Lyle,

73  Alberto  I2PHD