From owner-freebsd-questions@FreeBSD.ORG Sat Nov 29 19:30:12 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id AE0DA106570A for ; Sat, 29 Nov 2008 19:30:12 +0000 (UTC) (envelope-from Joerg.Schilling@fokus.fraunhofer.de) Received: from iron02.fraunhofer.de (iron02.fraunhofer.de [153.96.1.56]) by mx1.freebsd.org (Postfix) with ESMTP id 3853C8FC12 for ; Sat, 29 Nov 2008 19:30:11 +0000 (UTC) (envelope-from Joerg.Schilling@fokus.fraunhofer.de) Received: from pluto.fokus.fraunhofer.de ([195.37.77.164]) by iron02.fraunhofer.de with ESMTP/TLS/DHE-RSA-AES256-SHA; 29 Nov 2008 20:30:10 +0100 Received: from EXCHSRV.fokus.fraunhofer.de (bohr [10.147.9.231]) by pluto.fokus.fraunhofer.de (8.13.7/8.13.7) with SMTP id mATJU9e4024687; Sat, 29 Nov 2008 20:30:09 +0100 (MET) Received: from rigel ([10.147.65.195]) by EXCHSRV.fokus.fraunhofer.de with Microsoft SMTPSVC(6.0.3790.3959); Sat, 29 Nov 2008 20:30:09 +0100 Date: Sat, 29 Nov 2008 20:30:09 +0100 From: Joerg.Schilling@fokus.fraunhofer.de (Joerg Schilling) To: yuri@rawbw.com Message-ID: <49319841.Oqivnl2VRh3sEhq6%Joerg.Schilling@fokus.fraunhofer.de> References: <49313043.mP3zqfP/2LOQEKJe%Joerg.Schilling@fokus.fraunhofer.de> <49318B65.3000205@rawbw.com> In-Reply-To: <49318B65.3000205@rawbw.com> User-Agent: nail 11.22 3/20/05 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-OriginalArrivalTime: 29 Nov 2008 19:30:09.0250 (UTC) FILETIME=[E3FEDC20:01C95258] Cc: freebsd-questions@freebsd.org Subject: Re: Copying audio CD with dd/cdrecord produces unplayable CD X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 29 Nov 2008 19:30:12 -0000 Yuri wrote: > Joerg Schilling wrote: > > Well, you should not expect to get a usable read > > result from dd. > > > > Why? > Handbook recommends the use of dd for audio CD ripping. Well, then the handbook is sub-optimal. dd in general does not work at all to read CD-Audio; FreeBSD is an exception with repect to the fact that you get data at all. Here is a list of cons for dd even on FreeBSD: - dd may not work with all drives - Do you know what byteorder you get from a MMC CD-ROM drive on FreeBSD/Sparc? You would need network byteorder on Sparc but the MMC CD-ROM drive delivers intel byteorder due to a bug in the MMC standard cdrecord always asumes network byte order for RAW audio data, this is reasonable - Why would you deal with raw audio data at all if there are audio file formats that include a notation for byte order and sampling rates? - There is no jitter check and no quality control with dd on FreeBSD, cdda2wav works on all OS and has jitter control and qualiti control with e.g. libparanoia. - There is no way to get the correct CD structure back if you use dd. Cdda2wav reads meta-data and puts them into *.inf files. - With dd, you cannot read intentionally defective media as sold by the music mafia. Allowing to read CD-DA using dd on FreeBSD is a nice gag but nothing I would recommend in order to create a copy from an audio CD. Jörg -- EMail:joerg@schily.isdn.cs.tu-berlin.de (home) Jörg Schilling D-13353 Berlin js@cs.tu-berlin.de (uni) schilling@fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/ URL: http://cdrecord.berlios.de/private/ ftp://ftp.berlios.de/pub/schily