[alsa-devel] M-Audio FastTrack C400

Chris Cavey chris-alsa at rauros.net
Wed May 9 03:11:48 CEST 2012

I do not get that message anymore.

Fixing the "return 0" back to "break" results in the device not even 
registering, back to the -5 error from the beginning of this thread.

I'll capture more and get back to you.

The following derails the thread a bit:

As far as switching devices, I'm open. Due to a bug with a PCIE-PCI 
bridge on my mainboard, I cannot use any PCI devices (I've got a Delta44 
collecting dust). I really just want to find a single device, USB or 
Firewire (or PCIE), which works flawlessly in both Windows and Linux. 
Instrument/Mic input as well as independent balanced out and headphones.

Any thoughts on this?

On 5/5/2012 3:05 AM, Felix Homann wrote:
> Hi again,
> 2012/5/5 Chris Cavey<chris-alsa at rauros.net>:
>> No change.
> Hmm, do you still get this message:
>     ALSA mixer.c:352 cannot get ctl value: req = 0x83, wValue = 0x101,
> wIndex = 0x4001, type = 4
>     ALSA mixer.c:877 64:1: cannot get min/max values for control 1 (id 64)
> If so, can you please look at mixer.c 352 if line 352 corresponds to
> get_ctl_value_v2? (My line numbers are a bit off compared to yours it
> seems). Can you send some Ci lines from usbmon from before the
> mesasage appears.
>>   According to usbmon looks like no matter what channel I adjust,
>> the clock ctl is always being adjusted as if the wrong wIndex gets selected.
>> The clock wIndex is 0x8001 but the mixer volume is 0x4001. The wValue looks
>> correct (first mixer, according to my docs, should be 0x0100).
> That's strange. Can you try if your "return 0" instead of "break" in
> the device parsing is still needed now that we have a mixer quirk?
> (Just a blind guess...)
>> I'm going to
>> trace down the rabbit hole to learn how wValue/wIndex is derived from the
>> mixer controls.
> Just compare with the FTUs controls.
>> I'll keep tinkering. At some point I should probably just buy you a C400,
>> probably easier.
> Have you thought about switching to a MOTU or RME device? Maybe we
> should work on these ;-)
> Kind regards,
> Felix

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