From owner-freebsd-multimedia@FreeBSD.ORG Sun Jul 20 11:25:28 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 5CFD2CBF for ; Sun, 20 Jul 2014 11:25:28 +0000 (UTC) Received: from mail-lb0-x22b.google.com (mail-lb0-x22b.google.com [IPv6:2a00:1450:4010:c04::22b]) (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 C23242AEB for ; Sun, 20 Jul 2014 11:25:27 +0000 (UTC) Received: by mail-lb0-f171.google.com with SMTP id l4so4039232lbv.16 for ; Sun, 20 Jul 2014 04:25:25 -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=O5wd+O03XABLkXCSudeZwFm8nl6vwTLwD8+A/M16Uf8=; b=pt6tll98JzVxAgZJtO4lbmeUkM4gh3ViqPqVpOnUx3C+0tvXgMd+PREz7qMEXi29gk 5BvotkrhuVNhKNQyiQclcWmNNzB7rPruWXZCF72jnXzMkHU8nDtD+c6OzHprMLD6Mvmi bktqPgIhExeL7qtMGO1xqcCxG/RhBIzl7VfeXMdcJmMl7xfQgi9KT11KlM79za93UAPT YnTdy64gHwnvn+LkDc8Q/Nq9T983BtLMOLJI3mLv8cQp54cF/s3ne5Nh/4t7v0ucYU+O Taqxx/zt4QANRSTMIkJYpHsKUJf20aCJKHLCiZjyFt8ucZ0rVkJL0fj68ZbQ3b+wWYeM x+cA== MIME-Version: 1.0 X-Received: by 10.152.43.34 with SMTP id t2mr18002734lal.28.1405855525537; Sun, 20 Jul 2014 04:25:25 -0700 (PDT) Received: by 10.112.98.137 with HTTP; Sun, 20 Jul 2014 04:25:25 -0700 (PDT) In-Reply-To: References: <53CB913F.4060405@selasky.org> Date: Sun, 20 Jul 2014 13:25:25 +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 11:25:28 -0000 Hello Hans Petter, I have to make a compliment about the audio in Freebsd too. It sounds great. So it is just a matter of interpretation too. But perhaps it helps your project to change the irq requests. It is just an idea. Best regards, Hans 2014-07-20 12:56 GMT+02:00 Hans Ruhe : > 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 >>>>> >>>>> >>>> >>> >> >