Path: utzoo!news-server.csri.toronto.edu!rutgers!dimacs.rutgers.edu!seismo!uunet!mcsun!hp4nl!charon!jack
From: jack@cwi.nl (Jack Jansen)
Newsgroups: comp.sys.sgi
Subject: Re: noisy personal iris sound from /dev/audio
Keywords: /dev/audio
Message-ID: <3136@charon.cwi.nl>
Date: 13 Mar 91 10:28:40 GMT
References: <1991Mar10.235452.13067@agate.berkeley.edu>
Sender: news@cwi.nl
Lines: 18

Both sound input and output are noisy on the 4D25. I get an average
of 2 bits of noise when recording with a mike that is switched off,
and an audible hiss out of the speaker even when the output gain is set
to zero (it is worse with non-zero gain, obviously).

Everything the machine does effects the noise (moving the mouse,
computations, network traffic), so I assume that it is not a question
of improper shielding, but more one of coupling through the power
supply.

I guess they should market it as 'a 6 bit audio interface' in stead
of an 8 bit one. I'll just wait for my 4D35 to arrive before doing
any real audio work. The quality is good enough for my audio-biff, though.
-- 
--
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