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- From: cook@bebop.esd.sgi.com (Doug Cook)
- Newsgroups: comp.sys.sgi
- Subject: Re: xcdplayer-2.2 - X11 CD player for Sun and SGI
- Message-ID: <uopgqa8@zola.esd.sgi.com>
- Date: 11 Jan 93 23:41:39 GMT
- References: <1993Jan8.141125.17127@sol.ctr.columbia.edu> <1993Jan11.204230.3699@eagle.lerc.nasa.gov> <uonkdl8@rhyolite.wpd.sgi.com>
- Sender: news@zola.esd.sgi.com (Net News)
- Organization: Silicon Graphics, Inc. Mountain View, CA
- Lines: 29
-
-
- In article <uonkdl8@rhyolite.wpd.sgi.com>, vjs@rhyolite.wpd.sgi.com 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. As long as your ethernet is not dead, and as long as you
- > provide a few milliseconds of buffering and delay on the receiving end,
- > why would you get pauses in the sound? For unidirectional sound,
- > you don't care about latency, and could put horrendous amounts of
- > buffering and delay, say several tens of milliseconds worth.
-
- CD audio isn't 44kbyte/sec. It is 44.1k frames/sec, where a frame
- is a stereo pair of 16-bit samples. Thus it is ~176kB/sec, if no
- compression is used. But your point still stands; audio is easily
- done on the Ethernet. I frequently play NFS-mounted audio files at
- CD or higher rates, and seldom see dropouts.
-
- -Doug
-
- Doug Cook (cook@sgi.com) |
- Software Engineer, ISD Digital Media | "Exuberance is Beauty."
- Silicon Graphics, Inc. | -Wm. Blake
-