332 lines
16 KiB
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332 lines
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From fatcity!root@news.cts.com Mon Jan 5 14:50:59 1998
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["1623" "Mon" "5" "January" "1998" "12:03:38" "-0800" "Chris Schoeneman" "crs@millpond.engr.sgi.com" "<F001.0C927564.19980105120338@fatcity.com>" "41" "Re: [Q] OpenGL + Arbitrary display mode in Win32" "^From:" nil nil "1" nil nil nil nil nil]
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Reply-To: OPENGL-GAMEDEV-L@fatcity.com
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From: crs@millpond.engr.sgi.com (Chris Schoeneman)
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Sender: root@fatcity.com
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To: Multiple recipients of list OPENGL-GAMEDEV-L <OPENGL-GAMEDEV-L@fatcity.com>
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Subject: Re: [Q] OpenGL + Arbitrary display mode in Win32
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Date: Mon, 05 Jan 1998 12:03:38 -0800
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Doty, Lee wrote:
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>
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> Any sound gurus out there? I agree that if we could get 3d sound in
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> there, life would get exponentially happier.
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I'm willing to donate the sound code from bzflag. It's supports:
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arbitrary number of simultaneous sounds (limited by CPU speed)
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attenuation with distance
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propagation delay
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doppler effects
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stereo panning
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It runs in a separate thread and has a very simple interface. I have
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it running on Windows 95/NT and Irix, and Daryll Strauss ported it to
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Linux. The Windows version would work better if DirectSound didn't
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suck so bad, but it works reasonably well now.
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A drawback is that it can suck up a lot of CPU time since it has to
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do its own filtering and mixing. It also needs support for a better
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HRTF, reverb with distance, high-frequency rolloff with distance, and
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a way to set the volume on individual sounds. That last one is trivial
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but the others are more involved.
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Mark, you interested? I've also got fullscreen and resolution changing
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code for Irix.
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Cheers,
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-chris
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--
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Author: Chris Schoeneman
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INET: crs@millpond.engr.sgi.com
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Fat City Network Services -- (619) 538-5030 FAX: (619) 538-5051
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San Diego, California -- Public Internet Access
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--------------------------------------------------------------------
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From crs@millpond.engr.sgi.com Mon Jan 5 15:36:10 1998
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["1034" "Mon" "5" "January" "1998" "13:35:59" "-0800" "Chris Schoeneman" "crs@millpond.engr.sgi.com" "<199801052135.NAA21198@millpond.engr.sgi.com>" "23" "Re: bzflag sound playing code" "^From:" nil nil "1" nil nil nil nil nil]
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In-Reply-To: <199801052103.PAA30512@kenai.me.umn.edu> from "Curtis L. Olson" at Jan 5, 98 03:03:52 pm
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From: crs@millpond.engr.sgi.com (Chris Schoeneman)
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To: curt@me.umn.edu (Curtis L. Olson)
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Subject: Re: bzflag sound playing code
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Date: Mon, 5 Jan 1998 13:35:59 -0800 (PST)
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Curtis L. Olson wrote:
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>
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> Is the licensing of the bzflag sound code such that I could use it to
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> build in sounds support for our project? We would want to have a
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> continuously looping engine sound (plus wind sound, and maybe rain
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> hitting the windshield sound.) Then we'd need to intersperse the
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> other sounds such as flaps, stall horn, landing gear, thunder, crash,
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> etc. It sounds like it might be exactly the sort of thing we need.
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Hmm, it's not a perfect match. Most of your sounds are purely local,
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so you don't need the stereo panning, propagation delay, and doppler
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effect. However, that's no reason not to try it!
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Ripping my sound code out from bzflag shouldn't be too much work
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but I'm really busy at the moment. Could you wait about a week?
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BTW, as far as licensing goes I'd just want the copyright notice to
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stay on the source files (we'll have to tweek the legal notice) and
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a mention in the credits, if you have a credits list. A right to
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use enhancements to the code would be cool, too.
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Cheers,
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-chris
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From crs@millpond.engr.sgi.com Mon Jan 5 16:22:27 1998
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["1125" "Mon" "5" "January" "1998" "14:22:22" "-0800" "Chris Schoeneman" "crs@millpond.engr.sgi.com" "<199801052222.OAA21481@millpond.engr.sgi.com>" "27" "Re: bzflag sound playing code" "^From:" nil nil "1" nil nil nil nil nil]
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In-Reply-To: <199801052204.QAA31163@kenai.me.umn.edu> from "Curtis L. Olson" at Jan 5, 98 04:04:44 pm
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From: crs@millpond.engr.sgi.com (Chris Schoeneman)
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To: curt@me.umn.edu (Curtis L. Olson)
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Subject: Re: bzflag sound playing code
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Date: Mon, 5 Jan 1998 14:22:22 -0800 (PST)
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Curtis L. Olson wrote:
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>
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> Does your code support continuously looping sounds? Or would this be
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> fairly straight forward to implement? I've done virtually nothing
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> with sound in my life other than listen to it. :-)
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It does/should. bzflag doesn't use this code though so it may suffer
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from bit rot. I used it to test the Doppler effect.
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There may also be some issues around having a very large world. Imagine
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the sound as a spherical shell. Outside the shell, sound hasn't reached
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you yet; inside the shell, the sound has passed by. In bzflag I need
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to keep sounds around for as long as any part of the shell is inside the
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world because it's possible to move from one place to another instantly.
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Seems to me you have this same situation if you want external views.
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The sound engine is clever enough not to process sounds unless you're in
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the shell, so a large world probably won't cause any problems. I'm just
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not sure at the moment.
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> This all sounds completely reasonable. All our stuff is released
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> under the basic "GPL".
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Should be fine. I've no problem releasing my code under the GPL.
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Cheers,
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-chris
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From crs@millpond.engr.sgi.com Mon Jan 5 17:33:03 1998
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["660" "Mon" "5" "January" "1998" "15:32:53" "-0800" "Chris Schoeneman" "crs@millpond.engr.sgi.com" "<199801052332.PAA21873@millpond.engr.sgi.com>" "18" "Re: bzflag sound playing code" "^From:" nil nil "1" nil nil nil nil nil]
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In-Reply-To: <199801052322.RAA32525@kenai.me.umn.edu> from "Curtis L. Olson" at Jan 5, 98 05:22:08 pm
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X-Mailer: ELM [version 2.4 PL23]
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From: crs@millpond.engr.sgi.com (Chris Schoeneman)
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To: curt@me.umn.edu (Curtis L. Olson)
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Subject: Re: bzflag sound playing code
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Date: Mon, 5 Jan 1998 15:32:53 -0800 (PST)
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Curtis L. Olson wrote:
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>
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> Our code is all GPL'd, so if you can keep within those license
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> restrictions feel free to borrow code. (Or does bzflag take place a
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> long time ago in a galaxy far, far away ... I haven't tried running it
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> yet myself.) :-)
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Actually, it's already got accurate sun, moon, and stars. The star
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magnitudes are relatively okay (there's not enough dynamic range on
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a monitor anyway). You can specify any position on the earth, and
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the positions are accurately based on the time and date. Great minds
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think alike, eh?
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I don't have the planets as I thought I'd gone overboard myself. Guess
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I hadn't gone far enough!
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Cheers,
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-chris
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From curt@me.umn.edu Thu Apr 30 09:02:28 1998
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X-VM-v5-Data: ([nil nil nil nil nil nil nil nil nil]
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["3542" "" "30" "April" "1998" "09:02:26" "-0500" "Curtis L. Olson" "curt@me.umn.edu" nil "88" "[comp.os.linux.announce] Enlightened Sound Daemon version 0.2" "^From:" nil nil "4" nil nil nil nil nil]
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nil)
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Received: from kenai.me.umn.edu (curt@kenai.me.umn.edu [134.84.18.22])
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for <curt@me.umn.edu>; Thu, 30 Apr 1998 09:02:28 -0500 (CDT)
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Received: (from curt@localhost)
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by kenai.me.umn.edu (8.8.5/8.8.5) id JAA19157;
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Thu, 30 Apr 1998 09:02:27 -0500
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Message-ID: <u87m47v24t.fsf@kenai.me.umn.edu>
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Lines: 88
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X-Mailer: Gnus v5.3/Emacs 19.34
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From: curt@me.umn.edu (Curtis L. Olson)
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Sender: curt@me.umn.edu
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To: curt@me.umn.edu
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Subject: [comp.os.linux.announce] Enlightened Sound Daemon version 0.2
|
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Date: 30 Apr 1998 09:02:26 -0500
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--
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Curtis Olson University of MN, ME Dept.
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curt@me.umn.edu
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http://www.menet.umn.edu/~curt Try Linux!
|
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|
------- Start of forwarded message -------
|
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|
From: "Eric B. Mitchell" <emitchell@altaira.com>
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Newsgroups: comp.os.linux.announce
|
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|
Subject: Enlightened Sound Daemon version 0.2
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Followup-To: comp.os.linux.misc
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Date: Thu, 30 Apr 1998 08:25:43 GMT
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|
Organization: Altair Aerospace Corporation
|
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Message-ID: <pycola.893924743.30806@laulujoutsen.pc.helsinki.fi>
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Reply-To: emitchell@altaira.com
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-----BEGIN PGP SIGNED MESSAGE-----
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I am pleased to announce the preliminary release of the
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Enlightened Sound Daemon (EsounD version 0.2) for Linux.
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More details at <URL:http://www.netcom.com/~ericmit/EsounD.html>.
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This program is designed to mix together several digitized
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audio streams for playback by a single device. The current
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list of features includes the following functionality:
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o A simple authentication scheme is implemented. The first
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process to present a 16 byte key to the daemon determines
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the ownership of the daemon. The owner of the daemon may
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allow or disallow connections from other keys. If a HUP
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signal is received, ownership of the daemon is reset.
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o Playback of multiple digital samples simultaneously is
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supported. The daemon uses a raw sample format which
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is easily generated by the SOX utility from many other
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data formats.
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o The mixed audio data may be output from the daemon as a
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"monitor" stream.
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o Recording from the current input of the sound device is
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supported. Full duplex operation (simultaneous recording
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and playback) is supported.
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o Client connections may cache samples for playback by an
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assigned identification number. For example, a window
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manager may cache samples in the server for playback on
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various events, and play them back without replaying the
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full audio stream for the sample. Samples may be looped
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until the server receives a "stop sample" message.
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Currently, the only platform supported is Linux. It is intended
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that this program support multiple platforms. I have limited
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access to other Unix platforms, so any help in porting the
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Enlightened Sound Daemon to other platforms is appreciated.
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The amp program, by Tomislav Uzelac may be a good reference
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for porting the audio interface to other platforms.
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This is to be considered an alpha release, as functionality
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remains to be implemented.
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- -- ebm
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+=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=+
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| __ a.k.a. Eric B. Mitchell |
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| |_) . _ _| _| _ ericmit@ix.netcom.com |
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| | \ ( (_ (_| (_| (_| (/_ www.netcom.com/~ericmit |
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|
| How's My Programming? Call: 1 - 800 - DEV - NULL |
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|
+=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=+
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|
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||
|
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|
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- --
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This article has been digitally signed by the moderator, using PGP.
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http://www.iki.fi/mjr/cola-public-key.asc has PGP key for validating signature.
|
||
|
Send submissions for comp.os.linux.announce to: linux-announce@news.ornl.gov
|
||
|
PLEASE remember a short description of the software and the LOCATION.
|
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|
This group is archived at http://www.iki.fi/mjr/linux/cola.html
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-----BEGIN PGP SIGNATURE-----
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Version: 2.6.3ia
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Charset: latin1
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=Y1B3
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-----END PGP SIGNATURE-----
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------- End of forwarded message -------
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