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Message-ID: <925667FA055F4AEEB8A57B77C90220B3@JimPC>
From: "James Moritz" <james.moritz@btopenworld.com>
To: <rsgb_lf_group@blacksheep.org>
References: <4AAB7F2D.25346.12CA10F@dave.davesergeant.com>
In-Reply-To: <4AAB7F2D.25346.12CA10F@dave.davesergeant.com>
Date: Sat, 12 Sep 2009 13:33:07 +0100
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Subject: LF: Re: WOLF/WSPR Sound card issues
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Dear Dave,

AC 97 
(http://download.intel.com/support/motherboards/desktop/sb/ac97_r23.pdf ) 
specifies 48kHz as the basic, obligatory sample rate for compliant sound 
cards, so yours should certainly be able to do it - to find more info, you 
could try looking for the audio codec chip on the motherboard - usually a 
very tiny square 48pin thing near the audio connectors, and searching using 
its type number. But I guess what sample rate is actually used will depend 
on software, drivers and so forth - perhaps someone with experience of PC 
sound card programming could advise. Looking at the audio settings in the 
Windows control panel may well tell you what sample rates are possible. 
Also, some software allows you to select different sample rates, for 
instance Spectrum Lab, but not Argo as far as I know.

The errors you are getting in the measured frequency seem to be enormous - 2 
or 3%, which would certainly give rise to problems.

Cheers, Jim Moritz
73 de M0BMU

----- Original Message ----- 
From: "Dave Sergeant" <dave@davesergeant.com>
To: <rsgb_lf_group@blacksheep.org>
Sent: Saturday, September 12, 2009 11:59 AM
Subject: LF: WOLF/WSPR Sound card issues


 It seems that both WOLF and WSPR are
> designed for current sound cards which have 48,000 and 96,000 clock
> rates. Mine is obviously from the old stable so has 44,100 etc rates.
>
> For information it is the sound card interface built into the
> motherboard, an ASR Rock K7S41GX dating from 2003 with generic AC'97
> sound. Zilch more given about its spec in the manual.
>