Date: Thu, 26 Nov 1998 10:05:47 -0800 From: Dan Mahoney <dan@wolf.com> To: kent@iastate.edu Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Sound card as a cheap DAC Message-ID: <19981126100547.A13666@wolf.com> In-Reply-To: <199811260539.XAA22064@isua4.iastate.edu>; from Kent Vander Velden on Wed, Nov 25, 1998 at 11:39:25PM -0600 References: <199811260539.XAA22064@isua4.iastate.edu>
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> Hi. Can a sound card such as the SoundBlaster 64 Gold be used as an > inexpensive DAC? My goal would be to vary a voltage source under > computer control. I have tried to send a string of values into > /dev/audio and watch the response on an o-scope. I only seem to see > changes when the values going into /dev/audio are changing. This > makes me question my understanding of a sound card. Anyone have > experience in this area? I haven't looked at the output circuitry of a sound card recently, but I would expect it to be capacitively coupled. If so, you *would* only see output when the output levels were changing (i.e. AC output). Dan Mahoney dan@wolf.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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