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- Path: sparky!uunet!mcsun!sun4nl!cwi.nl!jack
- From: jack@cwi.nl (Jack Jansen)
- Newsgroups: comp.sys.sgi
- Subject: Re: xcdplayer-2.2 - X11 CD player for Sun and SGI
- Message-ID: <8605@charon.cwi.nl>
- Date: 12 Jan 93 15:53:58 GMT
- References: <1993Jan8.141125.17127@sol.ctr.columbia.edu> <1993Jan11.204230.3699@eagle.lerc.nasa.gov> <uonkdl8@rhyolite.wpd.sgi.com>
- Sender: news@cwi.nl
- Lines: 36
-
- vjs@rhyolite.wpd.sgi.com (Vernon Schryver) writes:
-
- >In article <1993Jan11.204230.3699@eagle.lerc.nasa.gov>, drich@sandman.lerc.nasa.gov (Daniel Rich) writes:
- >> ...
- >> As for reading the CD over the network, it doesn't do it. It might be
- >> an interesting feature, but there would probably be performance
- >> problems (you would probably get pauses in the sound trying to put
- >> 44.1K/s across the network), and it would only work on machines with
- >> audio hardware (ie. 4D/35 or Indigo).
-
-
- >44kByte/sec is trivial, less than 0.5% of ethernet bandwidth on modern
- >machines.
-
- Uhm.... Not really. 44Kbyte/s is 3% of the *theoretic* maximum
- bandwidth, and about 10-15% of the actual maximum bandwidth (going
- through UDP, etc). To make matters worse, CD output is not
- 44.1Kbyte/second but 44.1*(2 channels)*(2 bytes)/second, for a grand
- total of 176.4Kbyte/second, about half the available bandwidth.
-
- Listening to CDs over the network is possible, though, if you don't
- mind loosing some quality. I'm now listening to Talking Heads
- transmitted at 4Kb/second (mono, 8K samples/second, 4bit ADPCM coding)
- and it sounds fine, about AM radio quality. The audio data is actually
- broadcast to all interested stations on the net, using our 'radio'
- software, so a lot of people can listen while the data is only sent
- over the net once.
-
- You can ftp the radio stuff from ftp.cwi.nl, file /pub/radio2.0.1.tar.Z.
- (Hmm, I'm not sure if the SGI CD reader is already incorporated in the
- distribution. If not contact me).
- --
- --
- Jack Jansen | If I can't dance I don't want to be part of
- Jack.Jansen@cwi.nl | your revolution -- Emma Goldman
- uunet!cwi.nl!jack G=Jack;S=Jansen;O=cwi;PRMD=surf;ADMD=400net;C=nl
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