Date: Sun, 20 Jul 2014 12:54:46 +0200 From: Hans Ruhe <hansruhe1@gmail.com> To: Hans Petter Selasky <hps@selasky.org> Cc: freebsd-multimedia@freebsd.org Subject: Re: Making freebsd - pcbsd faster by changing the interrupt requests Message-ID: <CABeOOuk7VtrfJ2Af-48b7K03vOhF6efGmta5qzr3r-MSAmJZ4A@mail.gmail.com> In-Reply-To: <CABeOOuna%2BX-n4yAtUry3O1fmhWZpw-2pRd7L80PCsb_BWwpSOg@mail.gmail.com> References: <CABeOOu=buvGOV4YEBqr7z6-fN0EiMnYEuC0Rh0O1Av1RdKwA-w@mail.gmail.com> <53CB913F.4060405@selasky.org> <CABeOOunQuJHjN1xEwoV08msjYzPwqW0RrT2dpkNGzWM24Jb-_g@mail.gmail.com> <CABeOOuna%2BX-n4yAtUry3O1fmhWZpw-2pRd7L80PCsb_BWwpSOg@mail.gmail.com>
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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 <hansruhe1@gmail.com>: > 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 <hansruhe1@gmail.com>: > > 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 <hps@selasky.org>: >> >> 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 >>> >>> >> >
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