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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
>
>
>
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