From owner-freebsd-questions@freebsd.org Wed Apr 25 06:22:19 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 5A069FBE07A for ; Wed, 25 Apr 2018 06:22:19 +0000 (UTC) (envelope-from ralf.mardorf@rocketmail.com) Received: from sonic310-12.consmr.mail.ir2.yahoo.com (sonic310-12.consmr.mail.ir2.yahoo.com [77.238.177.33]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id D3C496AE16 for ; Wed, 25 Apr 2018 06:22:18 +0000 (UTC) (envelope-from ralf.mardorf@rocketmail.com) X-YMail-OSG: d.G7hKQVM1ndJrz0ZLraGVSqgDkWBa4amdS7M4aopbcizntY2aYddTbvVlYdk75 N0kh8xXQGZR5bnFa9c9DBCR7KRLir2Nh.anmo0vD8lPR6RfFDRVprTY1Jdx53j4r_OQArMMQf5fb rdj4BHZPYZoI_yPkHUbRGhwEoWLaejMXBYJuARVisJf3SNnXhydWQleHCvaNg866XxKxn4YIBAfy GQXT7xp3ESdWjnlL.LoVvhEi.1QTg66qKg76rKyUmL5JmwpJ.Po7pgZa1h0JjgjaOMAVCIR.hWNs _fBMWF7joC52iu2HRP.w_zJyICOH53HxPBNLCcJU4RLG6iSTQaVrPNyDaTt9RWWkJtbL9ICGUq0J JvM427PNxqz921b_3hScc2WjVB061XiwZCMJn_nXYMtfYzQ0UD0x64oy24WsOBDOKYw0uzZC0Ir1 z5ytia28XOIic.j3COAsacvKn.8qbwNxhNv2zuWnVddGxzuQtfAMpnilxiPcYNNuBFgv12eXxHtc ItyEwfqpivr3Y4urMca.XdGv4YBPkEk3V8iPW5LNRxXS9HhQoPewJPQSpYZpgbV6NHVvah.PaxjG mkG9VDH5g9RNjVR3o6Gx1x.hZ61Lb.ma7ctDMAxXflZCcXiRFUBrawzxWlk52lQ9_29IIADOguKn Ahw-- Received: from sonic.gate.mail.ne1.yahoo.com by sonic310.consmr.mail.ir2.yahoo.com with HTTP; Wed, 25 Apr 2018 06:22:11 +0000 Received: from x4e321471.dyn.telefonica.de (EHLO archlinux) ([78.50.20.113]) by smtp414.mail.ir2.yahoo.com (Oath Hermes SMTP Server) with ESMTPA ID 8e7034d0b62a02145d475e546f266df5 for ; Wed, 25 Apr 2018 06:12:02 +0000 (UTC) Date: Wed, 25 Apr 2018 08:12:04 +0200 From: Ralf Mardorf To: freebsd-questions@freebsd.org Subject: Re: audiophile sound on FreeBSD ? Message-ID: <20180425081204.34bb8047@archlinux> In-Reply-To: <20180424235410.5e175bc6@gumby.homeunix.com> References: <20180423224242.7299f430@WorkMachine> <20180424113308.52f35f93@WorkMachine> <20180424200924.12c648bf@archlinux> <20180424235410.5e175bc6@gumby.homeunix.com> X-Mailer: Claws Mail 3.16.0git136 (GTK+ 2.24.32; x86_64-arch-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit 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 06:22:19 -0000 On Wed, 25 Apr 2018 00:21:31 +0100, RW via freebsd-questions wrote: >On Tue, 24 Apr 2018 20:09:24 +0200 Ralf Mardorf wrote: >> Btw. an "audio CD" already provides not that good audio quality. What >> you need for high end audio quality are 48 KHz, > >I'd be astonished if you could tell the difference under double blind >conditions - even if you are a child. I'd be surprised, if most adults with trained hearing would be unable to perceive a difference. To keep it short, I'll quote a short and raw explanation: "> frankly, 48k may be a good enough for distribution, but it is > sub-optimal not for production ... and it is horrible for digital > synthesis. Only if you use 'primitive' algorithms. Unfortunately there's a lot of those around. In summary, 96 or 192 kHz will allow you to use simpler algorithms. That may be a good reason for higher sampler rates, but it doesn't mean you can't have the same performance at 48 kHz. Another good reason for higher sampling rates is that the antialising filters in the converters can have a much wider transition band (assuming you don't actually use the higher bandwidth), leading to much reduced latency. It's the reason why 'digital snakes' used in PA system usually work at 96 kHz. By starting the transition band at 24 kHz or so they can use very short filters, a fraction of a millisecond for some. The same matter makes all the difference between 44.1 and 48 kHz." - http://linux-audio.4202.n7.nabble.com/jack-oversampling-td89817.html Loosely speaking: It all depends on the tuning. You could assume that most gear and software works best at 48 KHz, this is professional audio studio standard and apart from audio CD, consumer standard, too. However, depending on your amp, your speakers or any other part of the audio chain or depending on the recorded signal, such as e.g. an electric guitar played via a Celestion speaker, you might be even unable to hear any loss when using DAT longplay (32 KHz, 12 bit non-linear). Since the subject is "audiophile sound on FreeBSD" I recommend to go with a RME audio interface or another professional audio interface. The OP should ensure that an audio interface that claims to be "professional" isn't just a "prosumer" audio interface. Without doubts, 48 KHz is the best choice. When using a professional audio interface, with an elCheapo Hifi amp and supermarket speakers, you wont be able to hear the good analog audio quality of your professional audio interface. If you can't hear the good analog audio quality, you can't notice any issues of different sample rates.