Making freebsd - pcbsd faster by changing the interrupt requests

[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 <hansruhe1 at 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 at 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 at 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
>>>
>>>
>>
>