From owner-freebsd-multimedia@FreeBSD.ORG Sun Jul 20 10:56:17 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 E3B6F6F3 for ; Sun, 20 Jul 2014 10:56:17 +0000 (UTC) Received: from mail-lb0-x233.google.com (mail-lb0-x233.google.com [IPv6:2a00:1450:4010:c04::233]) (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 5A23E28D1 for ; Sun, 20 Jul 2014 10:56:17 +0000 (UTC) Received: by mail-lb0-f179.google.com with SMTP id v6so4018369lbi.10 for ; Sun, 20 Jul 2014 03:56:15 -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=BJFC1aXGm2G9qKLTHZzoTYuxZruhZyhVh1LX2FnKTHo=; b=i5PE9Txujyl//RgCevtcYl3W9VFR7Khz26XZzlf/gmYN30PVUiB8DfATYey50qp8pm acATxyWQ5H7nAkCVvYU1zA32PQRihPqW7VTYcV8+EVoXmyvEWi/qA9d3ISgytJ0S2V1o lr0DcewVixD1i+w00fALf6TxSEke7jBIY0KCdQjgYWwDwX3+rL+N1K7tV2QjQtAHY0EC ng2T456CcKod+5/c6YkdaonY9m0Q0pWmXfKJbVYBD8uS8xRGLQgQlo7w/PCL5sAVaUq6 TtqpdAKLBuLS6drxQROyMlPqjEKi4KgX9p0d8uP3k1NTdkXt7JWRD2t4AFK9Gd0xrXEP eFeg== MIME-Version: 1.0 X-Received: by 10.112.91.163 with SMTP id cf3mr16665208lbb.42.1405853775194; Sun, 20 Jul 2014 03:56:15 -0700 (PDT) Received: by 10.112.98.137 with HTTP; Sun, 20 Jul 2014 03:56:15 -0700 (PDT) In-Reply-To: References: <53CB913F.4060405@selasky.org> Date: Sun, 20 Jul 2014 12:56:15 +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 10:56:18 -0000 This one is very nice too. Music made by using Linux http://linuxaudio.org/music/vol1 2014-07-20 12:54 GMT+02:00 Hans Ruhe : > Hello Hans Petter, > > This might be very usefull too: http://linuxaudio.org/members > > http://linuxaudio.org/about > > Best regards, > Hans > > > 2014-07-20 12:37 GMT+02:00 Hans Ruhe : > > ps I am currently testing Logitech Picoplayer installed on a Raspberry PI >> which will be part of the dac as it is happens to have an IS2 connection. >> The DAC itself is already quite special as even Japanese hifi companies are >> interested and flew to Germany where the Dutch developer is living. He is >> working together with the tube designer and hifi journalist. >> >> http://www.dddac.com/ is his website. It is in English :-) >> >> Best regards, >> Hans >> >> >> >> >> >> 2014-07-20 12:31 GMT+02:00 Hans Ruhe : >> >> 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 >>>> >>>> >>> >> >