Re: FW difference - DAC not locking correctly

[Davor Herga <davor.herga@xxxxxxxxxxxxxx>]

I am also attaching kernel and system logs for FW4 and FW2014-2

Thank you,
Davor.

On 17. 12. 2014 21:52, Davor Herga wrote:

Sorry for re-posting, but I made a mistake naming the files..

Hello all!

I have two Audio-gd DACs, they both use VIA VT1731 USB receiver chip, but they have different firmwares. The problem is, that one of the two firmwares behaves "strange". The DAC does not "lock in" correctly, when it is set to 2x oversample, but has no problems when set two 4x or 8x oversample (these are WM8741 filter features). By "does not lock in" I mean, that DAC is recognised by the system, but only noise is heard. This noise (sounds like white noise) stops when music is started.

  I know this is not ALSA problem per se, but would like to know if anybody can explain why this is happening.

I am attaching lsusb -v prints:
FW4 - has no problems in locking
FW2014-2 - DAC set to 2x oversampling (noise problem)
FW2014-4 - DAC set to 4x oversampling (same FW/DAC as FW2014-2, but set to 4x oversampling, no problems)

FW4-FW2014-2diff - diff output between FW9 and FW2014-2 (2x oversample) lsusb -v output
FW4-FW2014-4diff - diff output between FW9 and FW2014-4 (4x oversample) lsusb -v output
FW2014-2-FW2014-4diff diff output between FW2014-2 (2x oversample) and FW2014-4 (4x oversample) lsusb -v output

To avoid misunderstanding, I did try to change firmwares on DACs, but problem appears no matter which DAC is used, so the problem is in the firmware, not the DAC.


Thank you,
Davor.

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Kernel log

12/18/14 08:04:54 AM	usb 2-1.2	new high-speed USB device number 5 using ehci-pci
12/18/14 08:04:58 AM	usb 2-1.2	New USB device found, idVendor=040d, idProduct=3410
12/18/14 08:04:58 AM	usb 2-1.2	New USB device strings: Mfr=1, Product=2, SerialNumber=0
12/18/14 08:04:58 AM	usb 2-1.2	Product: Audio-gd
12/18/14 08:04:58 AM	usb 2-1.2	Manufacturer: Audio-gd
12/18/14 08:05:00 AM	input	Audio-gd Audio-gd as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.2/input/input13
12/18/14 08:05:00 AM	hid-generic 0003	40D:3410.0002: input,hidraw0: USB HID v1.00 Device [Audio-gd Audio-gd] on usb-0000:00:1d.0-1.2/input2


System log

12/18/14 08:04:52 AM	HP-650	kernel	[ 1642.349470] usb 2-1.2: new high-speed USB device number 5 using ehci-pci
12/18/14 08:04:56 AM	HP-650	kernel	[ 1646.418434] usb 2-1.2: New USB device found, idVendor=040d, idProduct=3410
12/18/14 08:04:56 AM	HP-650	kernel	[ 1646.418441] usb 2-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
12/18/14 08:04:56 AM	HP-650	kernel	[ 1646.418445] usb 2-1.2: Product: Audio-gd
12/18/14 08:04:56 AM	HP-650	kernel	[ 1646.418448] usb 2-1.2: Manufacturer: Audio-gd
12/18/14 08:04:59 AM	HP-650	kernel	[ 1648.665062] input: Audio-gd Audio-gd as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.2/input/input13
12/18/14 08:04:59 AM	HP-650	kernel	[ 1648.665398] hid-generic 0003:040D:3410.0002: input,hidraw0: USB HID v1.00 Device [Audio-gd Audio-gd] on usb-0000:00:1d.0-1.2/input2
12/18/14 08:04:59 AM	HP-650	mtp-probe	checking bus 2, device 5: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2"
12/18/14 08:04:59 AM	HP-650	mtp-probe	bus: 2, device: 5 was not an MTP device

Kernel log

12/18/14 08:10:33 AM	usb 2-1.2	new high-speed USB device number 6 using ehci-pci
12/18/14 08:10:33 AM	usb 2-1.2	New USB device found, idVendor=040d, idProduct=3410
12/18/14 08:10:33 AM	usb 2-1.2	New USB device strings: Mfr=1, Product=2, SerialNumber=0
12/18/14 08:10:33 AM	usb 2-1.2	Product: Audio-gd
12/18/14 08:10:33 AM	usb 2-1.2	Manufacturer: Audio-gd
12/18/14 08:10:33 AM	input	Audio-gd Audio-gd as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.2/input/input14
12/18/14 08:10:33 AM	hid-generic 0003	40D:3410.0003: input,hidraw0: USB HID v1.00 Device [Audio-gd Audio-gd] on usb-0000:00:1d.0-1.2/input2


System log

12/18/14 08:10:31 AM	HP-650	kernel	[ 1981.001127] usb 2-1.2: new high-speed USB device number 6 using ehci-pci
12/18/14 08:10:31 AM	HP-650	kernel	[ 1981.144282] usb 2-1.2: New USB device found, idVendor=040d, idProduct=3410
12/18/14 08:10:31 AM	HP-650	kernel	[ 1981.144290] usb 2-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
12/18/14 08:10:31 AM	HP-650	kernel	[ 1981.144294] usb 2-1.2: Product: Audio-gd
12/18/14 08:10:31 AM	HP-650	kernel	[ 1981.144297] usb 2-1.2: Manufacturer: Audio-gd
12/18/14 08:10:31 AM	HP-650	kernel	[ 1981.315935] input: Audio-gd Audio-gd as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.2/input/input14
12/18/14 08:10:31 AM	HP-650	kernel	[ 1981.316267] hid-generic 0003:040D:3410.0003: input,hidraw0: USB HID v1.00 Device [Audio-gd Audio-gd] on usb-0000:00:1d.0-1.2/input2
12/18/14 08:10:31 AM	HP-650	mtp-probe	checking bus 2, device 6: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2"
12/18/14 08:10:31 AM	HP-650	mtp-probe	bus: 2, device: 6 was not an MTP device

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