[LAU] rtirq configuration with external USB DAC?

al3xu5 / dotcommon dotcommon at autistici.org
Mon Aug 5 11:37:21 CEST 2019


Hi

I have a realtime audio server running mpd with an external DAC connected to a
USB2 (full-speed) port.

I am in doubt as to how the rtirq configuration should be at best, in
particular the entries: 

RTIRQ_NAME_LIST=
RTIRQ_NON_THREADED=
RTIRQ_HIGH_LIST=

Thanks in advance for you help.
Regards

--
My setup is here below:

rtirq package: rtirq-init version 20150216-2

~~~
$ cat /proc/asound/cards
 0 [MDAC           ]: USB-Audio - Audiolab M-DAC
                      Lakewest Audio Audiolab M-DAC at usb-0000:00:1d.0-1.6,
full speed
~~~

~~~
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: MDAC [Audiolab M-DAC], device 0: USB Audio [USB Audio]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
~~~

~~~
$ cat /proc/asound/modules 
 0 snd_usb_audio
~~~

~~~
$ sudo lspci -v
...
00:1d.0 USB controller: Intel Corporation 8 Series USB EHCI #1 (rev 04)
(prog-if 20 [EHCI]) ...
    Kernel driver in use: ehci-pci
    Kernel modules: ehci_pci
...
~~~

~~~
$ cat /proc/interrupts 
           CPU0       CPU1       CPU2       CPU3       
...
 23:      15168      19473     344933      10188   IO-APIC  23-fasteoi
ehci_hcd:usb1 
...
~~~


-- 
al3xu5

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