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RE: [linrad] Sound card problem?

Hi Leif

First off all, thank you very much for providing so interesting a dsp package!

I don't use OSS since my sound card was configured without any problem by linrad. I have tried all the possible combinaisons offered by the mixer (available on a window in Mandrake) with the mutes and it haven't cured the problem.
I will try with an other sound card.

Just a question : does anyone have had success in decoding the call of the very weak station in the UNKN422 record with linrad?



---------- Initial Header -----------

From      : owner-linrad@xxxxxxxxxxxxxxxxxxxxxx
To          : <linrad@xxxxxxxxxxxxxxxxxxxxxx>
Cc          : 
Date      : Thu, 22 Jan 2004 02:48:12 +0100
Subject : RE: [linrad] Sound card problem?

Hi Matthieu,

> Without any microphone connected to the sound card I have this problem:
> If I increase the sound level (using the red bar) a strong spur 
> appears on the fft display centered on the frequency of the pitch 
> I have set. 

The sound cards have analog "switches" that are used to connect the
different analog signal sources to the ADC input and to the loudspeaker
output. These switches are set by a "mixer program". Each sound system
has it's own "sound mixer program" which has to be configured to fit
the soundcard you use. Under OSS the command to ossmix is llinesw OFF 
and rlinesw OFF. I am not familiar to the other sound systems, but
presumably there is a "mute" button somewhere.

On portable computers it may be more difficult (or impossible) because
the manufacturers do unspecified things to the hardware and supply
drivers for Windows only:(


Leif / SM5BSZ

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