From owner-freebsd-multimedia@FreeBSD.ORG Sun Jul 20 10:31:53 2014 Return-Path: Delivered-To: freebsd-multimedia@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 2CDC32FE for ; Sun, 20 Jul 2014 10:31:53 +0000 (UTC) Received: from mail-la0-x234.google.com (mail-la0-x234.google.com [IPv6:2a00:1450:4010:c03::234]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 948AF275B for ; Sun, 20 Jul 2014 10:31:52 +0000 (UTC) Received: by mail-la0-f52.google.com with SMTP id e16so4058959lan.11 for ; Sun, 20 Jul 2014 03:31:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=S5eet2xqiRNltcARw35EP3FqlqWlKW/SLUNuBgxVUZs=; b=BbLNJx+CczWqHbdtjqmy0zzV1xnyReiekqcvdVPcsnoaFnpq277wVNtVFagF4lGSvY h2ye6eri8+UPzhJZqLYmJ2QcZCutcosRYF4NJKykhKT/sdBBZeux8OwW6X5C5a42o5rC lbax2y1MSP4teEJU8QTRYcIXHIJuoQK9eW5hszTF0BaBzYL0ClP/xnEsP4zYvQuEH1w8 cy5UWzgwz0s+DlGdTgrnBqnFuSYyRjBHzgfXMF4NeJ99pchqzO/e/Mn7ou0/WvEBWFmO OKfQini/p6n8LDl9fEOkn34Vc1NYbQ6BSTmGW4Bja6me7vBVud7/Jp6QHecmW2cb97q5 NzAw== MIME-Version: 1.0 X-Received: by 10.112.131.202 with SMTP id oo10mr16545378lbb.65.1405852310465; Sun, 20 Jul 2014 03:31:50 -0700 (PDT) Received: by 10.112.98.137 with HTTP; Sun, 20 Jul 2014 03:31:50 -0700 (PDT) In-Reply-To: <53CB913F.4060405@selasky.org> References: <53CB913F.4060405@selasky.org> Date: Sun, 20 Jul 2014 12:31:50 +0200 Message-ID: Subject: Re: Making freebsd - pcbsd faster by changing the interrupt requests From: Hans Ruhe To: Hans Petter Selasky Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.18 Cc: freebsd-multimedia@freebsd.org 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 10:31:53 -0000 Hello Hans Petter, I am playing stereo. Primarily 16 bits 96khz and 24 bits 192khz. But I have albums that are sometimes better recorded on 16 bits than some 24 bit albums. So it is not always the case that higher sample rates are the better ones. Anyway, what I can hear is a much tighter bass, mid frequencies are therefore coming out better and the higher frequencies are better to listen to. I hope this was helpfull. Perhaps a peak at the Ubuntu project gives a better view of this: http://ubuntustudio.org/ Best regards, Hans 2014-07-20 11:51 GMT+02:00 Hans Petter Selasky : > 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 > >