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Re: [Discuss-gnuradio] Followup: M-Audio Revolution 7.1 as audio source

From: Rafael Diniz
Subject: Re: [Discuss-gnuradio] Followup: M-Audio Revolution 7.1 as audio source at 192KHz: Fedora 14/Alsa/ICE1724 driver
Date: Thu, 30 Dec 2010 16:52:29 -0800 (PST)
User-agent: SquirrelMail/1.4.15

Have you tried the OSS driver, using the 4front drivers?

Best regards,
Rafael Diniz

> I'd noticed a problem with running the M-Audio Revolution 7.1 sound card
> at 192KHz as a source in Gnu Radio -- the spectrum was
>    all "funny", with the spectrum getting "reflected" about 48KHz,
> almost as if the actual sample rate on the card wasn't correct, and
>    perhaps set to 96KHz instead of the expected 192KHz.
> To eliminate Gnu Radio as a cause, I used "arecord" with the correct
> parameters to record a 20-second chunk of audio from the card,
>    then used Gnu Radio to plot the spectrum.  Sure enough, the spectrum
> is still not correct, so I suspect this is a driver issue.
> I *know* that I used to be able to use this card at 192KHz several years
> ago, and the card advertises 192KHz sampling as a feature.
> --
> Marcus Leech
> Principal Investigator
> Shirleys Bay Radio Astronomy Consortium
> http://www.sbrac.org
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio

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