From owner-freebsd-questions@freebsd.org Wed Apr 25 17:56:38 2018 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 30744FAB8BC for ; Wed, 25 Apr 2018 17:56:38 +0000 (UTC) (envelope-from freebsd.ed.lists@sumeritec.com) Received: from out2-3.antispamcloud.com (out2-3.antispamcloud.com [185.201.17.3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id B3B0D7D5C6 for ; Wed, 25 Apr 2018 17:56:37 +0000 (UTC) (envelope-from freebsd.ed.lists@sumeritec.com) Received: from [153.92.8.106] (helo=srv31.niagahoster.com) by mx64.antispamcloud.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1fBOeb-0005e6-0u; Wed, 25 Apr 2018 19:56:30 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sumeritec.com; s=default; h=Content-Transfer-Encoding:Content-Type: MIME-Version:References:In-Reply-To:Message-ID:Subject:Cc:To:From:Date:Sender :Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=QSU7ePTVDfS95pbP7IM2/+BRRzIu0JIvIXdJRnOLHao=; b=rNCM3do4kr6jcxPGt+mphn/fcN jJksr68F64EDDtnM1lUzT0BKP3ar3lINzkPa4mHNY0eP8+Tqw8rP/tZHaWnJiXLBrV4HIP9xPD8IR TpngJDdzA+2XAnOeqqdsYQ2S9uFxAvnD4TwyN9KiHpC3nSgVPJJR1V8eUQq+2agm4jm/6WJh2O4Hi Gj3qjLhiStVBARnqjTCjWCJy2RGUngPMQIt5DX5arqGaZcTAvn1b85uOqZmOen3lvbDcFxadHrQWL epqnC36qn3qUC6pwTu7sn/1IAkcA7jgRupUBvLOC/EU+nUZZkAEwTT8aJWAxUhlQ3GX8u6Hy+hdPx WVxI0YNg==; Received: from [114.125.101.18] (port=37353 helo=X220.sumeritec.com) by srv31.niagahoster.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89_1) (envelope-from ) id 1fBOeR-0008ym-CI; Thu, 26 Apr 2018 00:56:23 +0700 Date: Thu, 26 Apr 2018 01:56:17 +0800 From: Erich Dollansky To: Steve O'Hara-Smith Cc: freebsd-questions@freebsd.org Subject: Re: audiophile sound on FreeBSD ? Message-ID: <20180426015617.08c89a40.freebsd.ed.lists@sumeritec.com> In-Reply-To: <20180425121249.3de329616ad9c07822e5e572@sohara.org> References: <20180423224242.7299f430@WorkMachine> <20180424113308.52f35f93@WorkMachine> <20180424200924.12c648bf@archlinux> <20180424235410.5e175bc6@gumby.homeunix.com> <20180425185330.70fb9b1e.freebsd.ed.lists@sumeritec.com> <20180425121249.3de329616ad9c07822e5e572@sohara.org> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-OutGoing-Spam-Status: No, score=-1.0 X-AuthUser: freebsd.ed.lists@sumeritec.com X-Originating-IP: 153.92.8.106 X-AntiSpamCloud-Domain: out.niagahoster.com X-AntiSpamCloud-Username: niaga Authentication-Results: antispamcloud.com; auth=pass (login) smtp.auth=niaga@out.niagahoster.com X-AntiSpamCloud-Outgoing-Class: unsure X-AntiSpamCloud-Outgoing-Evidence: Combined (0.36) X-Recommended-Action: accept X-Filter-ID: EX5BVjFpneJeBchSMxfU5ixYTsuizykN/mSYV4W/mSZ602E9L7XzfQH6nu9C/Fh9KJzpNe6xgvOx q3u0UDjvO7kfqX20aHzgyPBMQVMfKqIW1qVSfP902TyFd2pWTc4i+kBuqA1kK+apPM/4YqUEFQTz WN0/6c1OeVx0Pev94h5kzgISAoaNw38zoEb7E0WlBMmyNbDn7R5kilAhwr3KtJJAgryuFbuuZT2x xMkTmm0KLrT5uaS+gO6UTCAxbVftq8cZWR20xkhRU+wteAIV/gw2PumJmLlsnGMWqoMXjs4W+aPN 2EfShEEGgr77vGPM5p/0jHI+4jcFgXWf7G0ncztWqrVH3GZyYxeOwcH765j+OVg/7O+tyVElvJ63 vY0Iza6sVdgwkBECjdoM4toPI22pHDwwk7Jb2vlaEyyktkqzFg7Z5LN4nMmqB2NPQrxbGWmxZ9sv yC8jtttFq4it9NezYqxGMqsKjARq8PBC4qhIAlvDy6EQrhjG0kd71UCNmdySlZou9qHIGOZDEEo7 O9CWUDl6hp96RIaeG6P8U6RGPYZZXkvmZIcO+5pLCnX741AqO/C8p2eJT8d1PZRyUt9TLrF9l3It GfA/WrnALV7jCYqLkE/yXcDWRb/BCaEzojmX5u6QQ8A3tr7Vu+yOd6jBjYnStd4Zgv3T73L8qNjV EOSluRuLNfsptaOx3KS5w8R7gzpD8RVzGPbBbjse8REVniihuDwEGDcmr6e3OPQamfIaV9iZxMet Odr1ksZ41wDjxQLrQJukWQHQ8zSrWTloZmHOZVX6aaKCVC+HTcrMQVQxNzuCe7oCzbqDAuy6kC60 Pll3Rp6No9F02OQBU8pz01J8ygQ5/Ih9YWo2D+ec0TwPIBJnngHP89wHBJTrUR5P22vfHRUlzBGr PpFcJc8b3TdJXiMWjSI7O3Gz2XWZ3JKVmi72ocgY5kMQSjs7XKBCcuSSP1pxFExLxCRrSvoi5gf8 MRzbGeW+PX/PpGl5+4x+hbGIaKoDk7dEfv2S X-Report-Abuse-To: spam@quarantine1.antispamcloud.com X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 Apr 2018 17:56:38 -0000 Hi, On Wed, 25 Apr 2018 12:12:49 +0100 Steve O'Hara-Smith wrote: > On Wed, 25 Apr 2018 18:53:30 +0800 > Erich Dollansky wrote: > > > After noticing that he has an original LP of > > a CD of mine, we plugged normal digital equipment in. Every child > > could hear the difference. > > There are substantial differences between what is recorded on > an LP and what is recorded on a CD even if they start from the same > master tape. the LP was even purchased before CDs were even invented. So, real old stuff with all the other noises a CD does not have. > > The audio for the LP will have been processed with RIAA (to be > reversed by the pre-amp on playback) while the audio for the CD will > have been filtered sharply to prevent aliasing. > > Then the audio for the LP will be mastered onto the LP with > some care (possibly compression being applied) to ensure that the > groove spacing is adequate to the amplitude being recorded while the > audio for the CD will be digitised. > > The playback pitch accuracy will depend on the rotation speed > of the turntable for the LP and for the readout speed of the CD > mechanism for the CD (which may or may not be buffered to prevent > mechanical jitter*). > > IOW they're bound to sound different - as to which is more > accurate you'd need to do a double blind test against the monitors > the mixing engineer used (at least I *think* that's the most valid > reference). > > *: I recall reading many years ago that some recording > engineers could tell which machine a digital recording was mastered on > because of the characteristic timing jitter imposed by the machine > onto the recording. > There is not doubt for me. Erich