21 Oct
2014
21 Oct
'14
12:28 p.m.
Hey all,
I have a HDA ( cat /proc/interrupts tells me so anyway: snd_hda_intel ).
Its my built-in laptop soundcard, and it works pretty well, down to about
44.1kHz, -p128 -n3. That's ~8ms, which is acceptable IMO.
I've read on mailing list / internet somewhere* that spec for the HDA is
pretty open-to-interpretation, so I think the exact hardware / chipset
would need to be tested to get true results.
-Harry
*and lost the link..
On Tue, Oct 21, 2014 at 11:14 AM, Patrick Shirkey <
pshirkey(a)boosthardware.com> wrote:
On Tue, October 21, 2014 8:41 pm, Carlos sanchiavedraz wrote:
Thanks!
It'll be great if it runs Debian/Musix and if it could be configured for
RT
audio.
I have installed Debian but there were issues with the wifi chipset so I
switched to ubuntu which has better support for wifi ootb. Simply because
I didn't want to spend any more time on wifi issues at that point having
just ditched a rockchip device with similar problems. Now I don't use wifi
so I could switch back to debian but seeing as everything is already setup
there is not much motivation.
The realtime config is in place when I installed jack/ardour2. I have not
tested the actual best case latency with jack yet. It works fine with -p
1024 -r48000 -n2. Maybe someone else has latency details on the audio
chipset with other systems? (snd-hda-intel)
I'll try to run some tests when my daughter is not watching teletubbies.
--
Patrick Shirkey
Boost Hardware Ltd
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http://www.openavproductions.com
2014-10-21 11:37 GMT+02:00 Patrick Shirkey
<pshirkey(a)boosthardware.com>om>:
>
> On Tue, October 21, 2014 8:27 pm, Carlos sanchiavedraz wrote:
> > 2014-10-20 17:10 GMT+02:00 Patrick Shirkey
> <pshirkey(a)boosthardware.com>om>:
> >
> >>
> >> On Mon, October 20, 2014 10:59 pm, Jeremy Jongepier wrote:
> >> > On 10/20/2014 11:34 AM, Atte wrote:
> >> >> Dunno about jack, but it seems interesting! However I can't
seem
> to
> >> find
> >> >> any prices...
> >> >
> >> > These devices are fairly cheap starting from about $50:
> >> >
> >>
>
http://www.dx.com/p/ditter-u20-dual-core-android-4-2-google-tv-hd-player-w-…
> >
>
> If you want something that is relatively cheap that can run pianoteq,
> linuxsampler, etc... then you should look into the Intel NUC range.
>
> They provide a very nice piece of gear for a stand alone solution and
> decent responsive support via the OTC forums. I requested a change to
> the
> BIOS and they did it for me as an update.
>
> I have had one for several months as a head for my home entertainment
> center and it is working very well. Yesterday I did some edits with
> ardour2. All I had to do was "apt-get install ardour".
>
> It's not $50 but it is less than $300 for a complete 64 bit x86
solution
> including RAM/HDD/SSD. The case is brushed
aluminium and it is very
> robust. If you get an SSD it is nearly 100% solid state apart from
the
> CPU
> fan which is almost noiseless.
>
> My (cheap) home stereo speaker system generates more noise than the
fan
> and I have it running 24/7 for net streaming
to TV with full 1080p
over
> hdmi.
>
> Saves all the hassle of learning how to cross compile and the general
> issues associated with developing for ARM.
>
> I tried several other options before settling on this one. They were
> cheaper but also more frustrating.
>
> Intel are catching up on ARM these days with the 16/14/12nm fab
process.
>
> > That's one of the cheapest I could find with an Allwinner A20
chipset.
> > Better would be to get something like a
Cubieboard.
> >
>
> --
> Patrick Shirkey
> Boost Hardware Ltd
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>
That about Intel NUC range sounds really interesting. Which device do
you
have, Patrick? I guess the possibilities are one
of these:
http://techpartner.intel.com/campaigns/nuc/
I got the cheapest one at the time which was the DNY2820FKH. It has a
dual
core celeron and 4GB RAM. I think it can take up to 16GB.
Apart from running Ardour, what about RT and IRQs
and that stuff?
Thanks Patrick.
The rt config is in place but I haven't really pushed it for audio
generation yet. It runs electricsheep and full 1080p video/audio without
any issues. I can get about 30fps with 1080p which is decent for viewing
but not fast enough for competitive playing.
Here is cat /proc/interrupts
CPU0 CPU1
0: 26 0 IO-APIC-edge timer
1: 2 0 IO-APIC-edge i8042
8: 1 0 IO-APIC-fasteoi rtc0
9: 0 0 IO-APIC-fasteoi acpi
10: 10801372 0 IO-APIC-edge ite-cir
12: 4 0 IO-APIC-edge i8042
103: 1018511 0 PCI-MSI-edge xhci_hcd
104: 7418719 0 PCI-MSI-edge ahci
105: 113014233 0 PCI-MSI-edge eth0
106: 216595760 0 PCI-MSI-edge i915
107: 373 1604714 PCI-MSI-edge iwlwifi
108: 1368299 0 PCI-MSI-edge snd_hda_intel
NMI: 48085 47493 Non-maskable interrupts
LOC: 383351941 317871495 Local timer interrupts
SPU: 0 0 Spurious interrupts
PMI: 48085 47493 Performance monitoring interrupts
IWI: 4051038 6083943 IRQ work interrupts
RTR: 0 0 APIC ICR read retries
RES: 69587463 71022804 Rescheduling interrupts
CAL: 427 487 Function call interrupts
TLB: 1192097 1158476 TLB shootdowns
TRM: 0 0 Thermal event interrupts
THR: 0 0 Threshold APIC interrupts
MCE: 0 0 Machine check exceptions
MCP: 2904 2904 Machine check polls
ERR: 0
MIS: 0
--
Patrick Shirkey
Boost Hardware Ltd
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