Date: Sun, 20 Jul 2014 12:56:15 +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: <CABeOOu=35zBMBak72B2gQsen72hOzOhvp7tZSO6TxxUsg6vxkA@mail.gmail.com> In-Reply-To: <CABeOOuk7VtrfJ2Af-48b7K03vOhF6efGmta5qzr3r-MSAmJZ4A@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> <CABeOOuk7VtrfJ2Af-48b7K03vOhF6efGmta5qzr3r-MSAmJZ4A@mail.gmail.com>
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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 <hansruhe1@gmail.com>: > 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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