[alsa-devel] USB Audio Interface / Denon MC7000 and MC8000 controller

[Tobias]

Thank you for taking care of this...

I have tried with the latest Kernel 5.4.11 in Ubuntu 16.04 and
$ dmesg
still shows
"clock source 65 is not valid, cannot use"

My current running stable system is

$ uname -a
$ Linux tobias-V130 4.15.0-23-generic #25~16.04.1 SMP Fri Dec 20 
20:16:19 CET 2019 x86_64 x86_64 x86_64 GNU/Linux

in where I applied the chane described in here:
https://alsa-user.narkive.com/2tDAO87f/troubleshooting-new-usb-audio-device#post11

Just for my understanding what you now need me to do...
deleting the line in /sound/usb/clock.c that states "return -ENXIO;"
and compile the kernel again.

Clemes mentioned in his last post to add logging but I have no idea what 
he means by that. Can you briefly guide me what I would need to do?

Thanks again.
Tobias

Am 14.01.20 um 15:16 schrieb Takashi Iwai:
> On Mon, 13 Jan 2020 14:58:53 +0100,
> Tobias wrote:
>> Hello dear ALSA developers - is there any chance to get the Denon
>> MC7000 and MC8000 USB Audio devices supported? See previous message
>> for details.
> Which kernel did you try?  IOW, does the problem still persist with
> the recent kernel?
>
> If yes, how was the last question Clemens pointed in the forum you
> cited?
>
>
> thanks,
>
> Takashi
>
>> Thanks a lot
>> Tobias
>>
>>
>>
>> Am 14.12.19 um 09:24 schrieb Tobias:
>>> Hello dear ALSA developers.
>>>
>>> I have purchased a MC7000 controller in order to control MIXXX on
>>> Ubuntu 16.04. According to the Denon specification the controller
>>> should have been class compliant but there is an issue with the
>>> Audio interface to work properly giving following message ...
>>>
>>> $ dmesg
>>> ...
>>> |[   74.522831] usb 1-1.3: new high-speed USB device number 6 using
>>> xhci_hcd
>>> [   74.623784] usb 1-1.3: New USB device found, idVendor=15e4,
>>> idProduct=8004
>>> [   74.623789] usb 1-1.3: New USB device strings: Mfr=1, Product=2,
>>> SerialNumber=3
>>> [   74.623793] usb 1-1.3: Product: DENON DJ MC7000
>>> [   74.623796] usb 1-1.3: Manufacturer: DENON DJ
>>> [   74.623798] usb 1-1.3: SerialNumber: 201603
>>> [   74.625134] usb 1-1.3: clock source 65 is not valid, cannot use
>>>
>>> "|||clock source 65 is not valid, cannot use" is repeated
>>> uncountable times then
>>>
>>>
>>> |I found a discussion here for the MC8000 Audio interface which was
>>> not working and showing the same error message:
>>>
>>> https://alsa-user.narkive.com/2tDAO87f/troubleshooting-new-usb-audio-device#post8
>>>
>>>
>>> The solution was to change sound/usb/clock.c and recompile the kernel.
>>> This is not practical for daily use case so I would like to ask if
>>> the ALSA team could possibly find a permanent fix for ordinary
>>> users.
>>>
>>> To get my outputs for
>>>
>>> aplay -l
>>> aplay -L
>>> |||aplay -D plughw:CARD=MC7000,DEV=0 Grimmaldika-MakeBelieve.wav
>>> |lsusb -v
>>> mixxx --controllerDebug||
>>> JackServer error message|
>>>
>>> you may have a look at the Mixxx Community Forums here(just on page,
>>> you don't need to find and read on multiple pages)
>>>
>>> https://www.mixxx.org/forums/viewtopic.php?f=7&t=12962&start=10
>>>
>>> If you need any more information then please let me know.
>>>
>>> Thanks a lot for your support on this matter.
>>>
>>> Cheers!
>>> OsZ
>>> ||
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