Date: Sun, 20 Jul 2014 13:25:25 +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=gCJqLdRH0aHM7M-MwxN03tM8wF%2BjqLJLNdVssaazjyg@mail.gmail.com> In-Reply-To: <CABeOOu=35zBMBak72B2gQsen72hOzOhvp7tZSO6TxxUsg6vxkA@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> <CABeOOu=35zBMBak72B2gQsen72hOzOhvp7tZSO6TxxUsg6vxkA@mail.gmail.com>
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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 <hansruhe1@gmail.com>: > 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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