Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!mips!sgi!shinobu!odin!ramoth.esd.sgi.com!msc
From: msc@ramoth.esd.sgi.com (Mark Callow)
Newsgroups: comp.sys.sgi
Subject: Re: noisy personal iris sound from /dev/audio
Keywords: /dev/audio
Message-ID: <1991Mar11.191917.9759@odin.corp.sgi.com>
Date: 11 Mar 91 19:19:17 GMT
References: <1991Mar10.235452.13067@agate.berkeley.edu>
Sender: news@odin.corp.sgi.com (Net News)
Reply-To: msc@sgi.com
Organization: Silicon Graphics Inc., Entry Systems Division
Lines: 22

In article <1991Mar10.235452.13067@agate.berkeley.edu>, seth@miro.Berkeley.EDU (Seth Teller) writes:
|> i've been fooling with /dev/audio for the first time and there 
|> seems to be an awful lot of noise coming from the 'out' port.
|> i've got a six-foot patch cord leading from that to an active
|> (i.e., amplified) speaker, and a continuous low-frequency 
|> rumbling comes from the speaker.
|> 

This is typical of PI audio. It is not of very high quality.

If you have a serious interest in audio I recommend you get a 4D/35 upgrade.
The 4D/35 audio is completely new and is of high quality (AES/EBU digital
input/output, 16 bit A/D for analog input, >18-bit 8X oversampling D/A for
analog output etc.) We hired an Audio Engineer this time.

Please note that initial shipments of the 4D/35 will not have the audio
board due to various in-house delays. An audio kit will follow later.

-- 
Captain Multi-Media (aka Mark Callow)
msc@ramoth.sgi.com, ...{ames,decwrl}!sgi!msc
"Spirits of genius are always opposed by mediocre minds" - Albert Einstein