From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.6 required=5.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id fd4d4117 for ; Wed, 5 Jun 2019 22:15:23 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id B5A009B80D; Thu, 6 Jun 2019 08:15:21 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 054659B684; Thu, 6 Jun 2019 08:14:53 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="U4951cwD"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id 8A3239B684; Thu, 6 Jun 2019 08:14:51 +1000 (AEST) Received: from mail-vk1-f193.google.com (mail-vk1-f193.google.com [209.85.221.193]) by minnie.tuhs.org (Postfix) with ESMTPS id B6F869B682 for ; Thu, 6 Jun 2019 08:14:50 +1000 (AEST) Received: by mail-vk1-f193.google.com with SMTP id b69so85007vkb.3 for ; Wed, 05 Jun 2019 15:14:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=9Orx06+9QpX2DUM5tAYbUT9F7vXmv9mLWF1oxBgvOcU=; b=U4951cwD1B6DNL2W0Dk931stoh4tTHE6q5+JcmAfoLfVCAV4Ktwpt3nXwo4+PZxYOF C4i7dgqWs5qxbU/zXMYR4SmMZMxqsqU+xIYY0DYEosIUmNcJSoFntEmb4Drqc0FgoZrc WH/scDtE/6Vkke3eJPcWK/+1PqIzoeYaMQ2U73ULch6TBW9ine97IW9QL+cASEQpEpzd pQ1cw0gfoMlzC0+zCCs69PBAKB3b9m9me/bDsh3+osRccnIS6CWcLRplUQL2sxVaPPtC VOwU1KIn0imNCEKlpLibM6XNyb+rxvQb0pvCNzlrk8vhw7ry2Cf+kbJ3az2kc3lFyqCR 5Cxg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=9Orx06+9QpX2DUM5tAYbUT9F7vXmv9mLWF1oxBgvOcU=; b=eDQp3KaflvEDgHMxbGeNsXKwwvO5ntYStaUKhMpMcxJgXDG02jr/XrJ1WGDQRXWzlw Sb/UktclTtzVXZ3RFyAeSxigOOl5T2WR7r0RxIo2pNOelsUge3LEwIP+l07L5WDUCpfy CnHZXZu9/G+01t9riI/rbRElk4uRS77NfUcQhhcWed4qJST/CsLcbuNYNHBlC20QxN12 wUlaZqn6tI+NgZY9gJO1rL0xpvXkRhsETs+kqZXEU1zjzz0yLVZeua1ZsPrDAFu3p7Ck v0BDQGr7U1AmxIOr7EvHFXYazAhwLLwX9DmeVj2FFimbMk2MX5oX4DIJCBMiw3SI/jpP FG9w== X-Gm-Message-State: APjAAAWtVO2KFndonwbXcamfSNyhGt7MFeAhM3QuNJxhWsjOg+r1PRTQ 6ZW1Z5k4KldmVc3FVgNoS3x7XNWfyx9N7aR9Mt8= X-Google-Smtp-Source: APXvYqzDTvxPBLU3xnemqV0KHUZxlq0yJ50SQScpv2msDjycC6M11O7YQs4bbw3PaertzOGwcfKmjawNaeBgSUMOf5Y= X-Received: by 2002:a1f:8744:: with SMTP id j65mr16396622vkd.17.1559772889649; Wed, 05 Jun 2019 15:14:49 -0700 (PDT) MIME-Version: 1.0 References: <20190605160216.GA6188@lap> <20190605162920.GA18318@lap> In-Reply-To: From: Rob Pike Date: Thu, 6 Jun 2019 08:14:38 +1000 Message-ID: To: Dan Cross Content-Type: multipart/alternative; boundary="00000000000004954e058a9aed91" Subject: Re: [TUHS] PAC (Perceptual audio coder) X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: TUHS Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" --00000000000004954e058a9aed91 Content-Type: text/plain; charset="UTF-8" Ken Thompson and Sean Dorward worked hard on PAC to get it ready for release. Our plan was to fill up the rest of the Plan 9 release CD with several hundred meg of PAC audio. I gathered together music from a number of famous musicians (I won't name drop here but you'd recognize them all), much of it recorded just for us. We were going to release the source code for the decoder and, in a compromise for the business people trying to sell to the broadcasting industry (they eventually succeeded; digital FM broadcasting is derived from PAC), only 386 binaries for the encoder, at least for the initial release. At the time the encoder only ran about 1/4 real time on a PC. Then an AT&T lawyer stepped in at the last minute, was deeply offensive and rude to us, and shut down the effort for completely stupid and invalid reasons. I still bristle at the memory. What an asshole. PAC was so much clearer sounding that MP3. The world would have been a happier place. If only. -rob On Thu, Jun 6, 2019 at 4:57 AM Dan Cross wrote: > On Wed, Jun 5, 2019 at 12:29 PM aksr wrote: > >> On Wed, Jun 05, 2019 at 06:02:16PM +0200, aksr wrote: >> > Have anyone tried to get this open-sourced: >> >> *Has anyone... >> > > Not that I'm aware of, not that anyone would tell me, though I knew some > people who used it. My understanding was that the most useful/interesting > parts got wrapped up into MPEG-4. > > - Dan C. > > --00000000000004954e058a9aed91 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Ken Thompson and Sean Dorward worked hard on PAC to get it= ready for release. Our plan was to fill up the rest of the Plan 9 release = CD with several hundred meg of PAC audio. I gathered together music from a = number of famous musicians (I won't name drop here but you'd recogn= ize them all), much of it recorded just for us. We were going to release th= e source code for the decoder and, in a compromise for the business people = trying to sell to the broadcasting industry (they eventually succeeded; dig= ital FM broadcasting is derived from PAC), only 386 binaries for the encode= r, at least for the initial release. At the time the encoder only ran about= 1/4 real time on a PC.

Then an AT&T lawyer stepped = in at the last minute, was deeply offensive and rude to us, and shut down t= he effort for completely stupid and invalid reasons. I still bristle at the= memory. What an asshole.

PAC was so much clearer = sounding that MP3. The world would have been a happier place. If only.

-rob


On Thu, Jun 6, 2019 at 4:57 A= M Dan Cross <crossd@gmail.com>= ; wrote:
On Wed, Jun 5, 2019 at 12:29 PM aksr <aksr@t-com.me> wrote:
On Wed, Jun 05, 2019 at 06:02:16PM +0200, aksr wrote:
> Have anyone tried to get this open-sourced:

*Has anyone...

Not that I'm aware o= f, not that anyone would tell me, though I knew some people who used it. My= understanding was that the most useful/interesting parts got wrapped up in= to MPEG-4.

=C2=A0 =C2=A0 =C2=A0 =C2=A0 - Dan C.
=C2=A0
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