Re: [LAU] kernel changes

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To: <len@...>
Cc: linux-audio-user <linux-audio-user@...>
Date: Monday, February 11, 2013 - 1:05 am

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On Sun, Feb 10, 2013 at 7:38 PM, Len Ovens wrote:

>

that would likely be in the chipset that interacts with the bus. device
drivers for particular PCI(.) devices do not interact with this level of
hardware (in general).

> This may not be something that is run by the CPU

RME devices do not. they use Xilinx FPGA chips. the firmware (the actual
firmware) is on an eprom that is surface mounted.

personally, i consider audio interfaces with onboard DSP to be a mostly-bad
design. if i wanted DSP, i'd buy some kind of processor for that. i don't
want a decade old DSP chip cluttering up my audio interface - my hammerfall
cards are now 13 years old and still working perfectly, unaffected by the
fact that DSP technology has moved on.

> How much all of this interacts I don't know. What I do

i don't know of any MBs that in and of themselves handle sound badly (these
days, anyway). the problems come from a different set of levels (a few
notes on this (to be expanded):
http://manual.ardour.org/setting-up-your-system/the-right-computer-syste...

>

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On Sun, Feb 10, 2013 at 7:38 PM, Len Ove=
ns <len@ovenwerks.net> wrote:

On Sun, February 10, 2013 3:03 pm, Paul Davis wrote:

bably
ether
her
ndled
annel
he
r can
s.

Ok, so what I get from this is that the CPU sees a PCIe device in the=
same
way it sees a PCI device. Yet I know from reading the specs on both the
PCI to PCIe bridge and the MB chip sets, that there is some firmware
involved at both ends.that would likely be in the chi=
pset that interacts with the bus. device drivers for particular PCI(.) devi=
ces do not interact with this level of hardware (in general).=A0
This may not be something that is run by th=
e CPU
itself (though it could be) but something that could be run by another
processor in the glue logic itself. It may rather be part of the bios. I
don't know. Most of the PCI(e) sound cards have a DSP with some sort of=

firmware as well.RME devices do not. they use Xilinx =
FPGA chips. the firmware (the actual firmware) is on an eprom that is surfa=
ce mounted.personally, i consider audio interfaces with onboard DSP=
to be a mostly-bad design. if i wanted DSP, i'd buy some kind of proce=
ssor for that. i don't want a decade old DSP chip cluttering up my audi=
o interface - my hammerfall cards are now 13 years old and still working pe=
rfectly, unaffected by the fact that DSP technology has moved on.
=A0 How much all of this interacts I d=
on't know. What I do
see is a lot of brand new MBs that handle sound badly.i don't know of any MBs that in and of themselves handle sound bad=
ly (these days, anyway). the problems come from a different set of levels (=
a few notes on this (to be expanded): http://=
manual.ardour.org/setting-up-your-system/the-right-computer-system-for-digi=
tal-audio/

=A0

--
Len Ovens
www.OvenWerks.net

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Messages in current thread:
Re: [LAU] So what do you think sucks about Linux audio ?, shane richards, (Fri Feb 8, 9:17 pm)
Re: [LAU] So what do you think sucks about Linux audio ?, Chris Bannister, (Sun Feb 10, 2:36 am)
Re: [LAU] So what do you think sucks about Linux audio ?, hermann meyer, (Sun Feb 10, 5:38 am)
Re: [LAU] So what do you think sucks about Linux audio ?, hermann meyer, (Sun Feb 10, 6:05 am)
Re: [LAU] So what do you think sucks about Linux audio ?, Ralf Mardorf, (Sun Feb 10, 11:19 am)
Re: [LAU] So what do you think sucks about Linux audio ?, Dan MacDonald, (Sun Feb 10, 9:33 am)
Re: [LAU] So what do you think sucks about Linux audio ?, Ricardus Vincente, (Sun Feb 10, 2:53 pm)
Re: [LAU] So what do you think sucks about Linux audio ?, Raffaele Morelli, (Sun Feb 10, 3:53 pm)
Re: [LAU] So what do you think sucks about Linux audio ?, Louis Gorenfeld, (Sun Feb 10, 2:45 pm)
Re: [LAU] So what do you think sucks about Linux audio ?, Ralf Mardorf, (Sun Feb 10, 12:24 pm)
Re: [LAU] So what do you think sucks about Linux audio ?, Alexandre Prokoudine, (Sun Feb 10, 10:33 am)
Re: [LAU] kernel changes, Len Ovens, (Sun Feb 10, 10:33 pm)
Re: [LAU] kernel changes, Folderol, (Tue Feb 12, 2:57 pm)
Re: [LAU] kernel changes, Len Ovens, (Sun Feb 10, 6:09 pm)
Re: [LAU] kernel changes, Ralf Mardorf, (Sun Feb 10, 6:44 pm)
Re: [LAU] kernel changes, Len Ovens, (Sun Feb 10, 10:58 pm)
Re: [LAU] kernel changes, Paul Davis, (Sun Feb 10, 11:03 pm)
Re: [LAU] kernel changes, Len Ovens, (Mon Feb 11, 12:38 am)
Re: [LAU] kernel changes, Paul Davis, (Mon Feb 11, 1:05 am)
Re: [LAU] kernel changes, Len Ovens, (Tue Feb 12, 2:42 pm)
Re: [LAU] kernel changes, Ralf Mardorf, (Mon Feb 11, 2:17 am)
Re: [LAU] kernel changes -was - So what do you think sucks a..., Harry van Haaren, (Mon Feb 11, 12:12 am)
Re: [LAU] kernel changes, Len Ovens, (Sun Feb 10, 5:59 pm)
Re: [LAU] kernel changes, Ralf Mardorf, (Sun Feb 10, 6:30 pm)
Re: [LAU] kernel changes, Len Ovens, (Sun Feb 10, 9:09 pm)
Re: [LAU] So what do you think sucks about Linux audio ?, Raffaele Morelli, (Sun Feb 10, 3:48 pm)