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

[Tobias]

Thanks a lot for the hint Alexander. Anyhow, I am not sure where to put 
that.
Also Takashi Iwai was involved already and I would like to prevent 
mixing up things or double work.

Please advise in detail what I would need to do as I am not a programmer.

Thanks a lot.
Tobias

Am 20.01.20 um 09:22 schrieb Alexander Tsoy:
> В Сб, 14/12/2019 в 09:24 +0100, Tobias пишет:
>> 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
>>
> Please try to add delay after each class control request in
> snd_usb_ctl_msg_quirk():
>
>      if (chip->usb_id == USB_ID(0x15e4, 0x8004) &&
>          (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
>          msleep(20);
>