From owner-freebsd-multimedia@FreeBSD.ORG Sun Jul 20 09:51:46 2014 Return-Path: Delivered-To: freebsd-multimedia@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id D199CD47 for ; Sun, 20 Jul 2014 09:51:46 +0000 (UTC) Received: from mail.turbocat.net (mail.turbocat.net [IPv6:2a01:4f8:d16:4514::2]) (using TLSv1.1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 94344249D for ; Sun, 20 Jul 2014 09:51:46 +0000 (UTC) Received: from laptop015.home.selasky.org (cm-176.74.213.204.customer.telag.net [176.74.213.204]) (using TLSv1 with cipher ECDHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by mail.turbocat.net (Postfix) with ESMTPSA id 6DC7B1FE027; Sun, 20 Jul 2014 11:51:45 +0200 (CEST) Message-ID: <53CB913F.4060405@selasky.org> Date: Sun, 20 Jul 2014 11:51:59 +0200 From: Hans Petter Selasky User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:24.0) Gecko/20100101 Thunderbird/24.1.0 MIME-Version: 1.0 To: Hans Ruhe , freebsd-multimedia@freebsd.org Subject: Re: Making freebsd - pcbsd faster by changing the interrupt requests References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-multimedia@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Multimedia discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 20 Jul 2014 09:51:46 -0000 On 07/20/14 11:09, Hans Ruhe wrote: > Hello everybody, > > I am testing for PCBSD primarily but I am also testing with a hifi > journalist, tube amplifier designer. This is the website: > http://www.audio-creative.nl/ > > Mind you it is mostly in Dutch but some parts are in English. They recently > started to sell kits like a dac and a tube phono amplifier. > Mind you this guy has a University degree in electronics and the firm he > works for make parts for ASML which sells machines for Intel, Samsung etc > to bake their processors. So it is a very high level of knowledge of > electronics. > > Always looking for better sound, 2 months ago I came upon Ubuntu Studio, > which projects uses real time latency and changing interrupt requests to > make it faster and also to have those requests dealing with audio and > movies a privilege above other ones. > > I am not that far that I exactly know what they do, but the fiddle in the > kernel for that :-) > Also I am not a developer ( i bought myself a Raspberry Pi to make the > first steps though). > > This is only an idea, but would it be possible to do such a thing for > freebsd and pcbsd as well ? > > I tested Ubuntu Studio with the use of Audacious and I could really hear a > difference. I have a 3 way loudspeakersystem and a EL84 tube amplifier in > Class A (yes it uses some more electricity but it really pays of enjoying > music a lot more ;-) > Hi, Some hardware devices have effects, like treble, base, 3D stereo, and so on, which might be configured differently. Can you tell us at what sample rates you are able to hear differences? --HPS