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Date:      Thu, 23 Jan 1997 13:40:53 -0800
From:      Steven Grady <grady@XCF.Berkeley.EDU>
To:        stanb@netcom.com (Stan Brown)
Cc:        freebsd-multimedia@freebsd.org (Free BSD Multimedia List)
Subject:   Re: Good sound programs to test my sound card? 
Message-ID:  <199701232140.NAA05977@scam.XCF.Berkeley.EDU>
In-Reply-To: Your message of Thu, 23 Jan 1997 15:46:39 -0500 (EST)  <199701232046.PAA25538@netcom4.netcom.com> 

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> From:  stanb@netcom.com (Stan Brown)
> Subject:  Good sound programs to test my sound card?
> 	Can someone sugest some programs to use to test my sound card, once I
> 	get it working?
> 
If you just want to test it, easiest is to cat a .au file to
/dev/audio.  Enclosed is a dog's bark.

That will test the pcm stuff.  If you want to test midi, you
could grab the playmidi package/port.  You can test the input by
saying "cat /dev/audio > output", then hitting ^C after a few seconds
(be sure to wait at least a second, so the buffer has a chance to fill up,
or you'll get a 0-length file), then catting the resulting file back
to /dev/audio.

Note that all of this is made mre complicated by mixing issues --
for instance, the recording may fail if:
    the volume is too low
    the mixer isn't passing through pcm output
    the input is not coming from the right source (mike vs. lin)
    the input gain is too low
    the output gain is too low
(Of course, not all sound-cards are alike.)

If there are no obvious errors (no errors when you cat from or to /dev/audio,
the amount of time it takes to cat the file is about the same as when you
grabbed it), then you might want to check mixer settings.

	Steven

begin 444 bark.au
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`
end



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