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Date:      Sun, 20 Jul 2014 12:37:09 +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:  <CABeOOuna%2BX-n4yAtUry3O1fmhWZpw-2pRd7L80PCsb_BWwpSOg@mail.gmail.com>
In-Reply-To: <CABeOOunQuJHjN1xEwoV08msjYzPwqW0RrT2dpkNGzWM24Jb-_g@mail.gmail.com>
References:  <CABeOOu=buvGOV4YEBqr7z6-fN0EiMnYEuC0Rh0O1Av1RdKwA-w@mail.gmail.com> <53CB913F.4060405@selasky.org> <CABeOOunQuJHjN1xEwoV08msjYzPwqW0RrT2dpkNGzWM24Jb-_g@mail.gmail.com>

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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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