Re: [LAU] Small instrument hardware module

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@email-addr-hidden> wrote:

>
> On Tue, October 21, 2014 8:41 pm, Carlos sanchiavedraz wrote:
> > 2014-10-21 11:37 GMT+02:00 Patrick Shirkey <pshirkey@email-addr-hidden>:
> >
> >>
> >> On Tue, October 21, 2014 8:27 pm, Carlos sanchiavedraz wrote:
> >> > 2014-10-20 17:10 GMT+02:00 Patrick Shirkey
> >> <pshirkey@email-addr-hidden>:
> >> >
> >> >>
> >> >> 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-1gb-ram-4gb-rom-hdmi-black-300969#.VET43IXSWAs
> >> >> >
> >> >>
> >> >> 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
> >> >> _______________________________________________
> >> >> Linux-audio-user mailing list
> >> >> Linux-audio-user@email-addr-hidden
> >> >> http://lists.linuxaudio.org/listinfo/linux-audio-user
> >> >>
> >> >
> >> > 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
> >> _______________________________________________
> >> Linux-audio-user mailing list
> >> Linux-audio-user@email-addr-hidden
> >> http://lists.linuxaudio.org/listinfo/linux-audio-user
> >>
> >
> > 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
> _______________________________________________
> Linux-audio-user mailing list
> Linux-audio-user@email-addr-hidden
> http://lists.linuxaudio.org/listinfo/linux-audio-user
>

-- 
http://www.openavproductions.com

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Received on Tue Oct 21 16:15:03 2014