Hello,
I intend to use the snd-usb-audio module with a Yamaha MOX6/8 built-in
USB audio card. It's USB 2.0, 24 bit/44.1 Khz, multi-channel (4 audio
channels) and multi-port (5 midi ports).
I would be glad if only get it works as 2 audio channels (full-duplex)
and 1 midi port.
Is it possible?
The interface with 2 audio channels configuration:
$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 003: ID 064e:a219 Suyin Corp. 1.3M WebCam (notebook
emachines E730, Acer sub-brand)
Bus 002 Device 004: ID 0499:1503 Yamaha Corp.
$ lsusb -t
2-1.2:1.0: No such file or directory
2-1.2:1.1: No such file or directory
2-1.2:1.2: No such file or directory
2-1.2:1.3: No such file or directory
2-1.2:1.4: No such file or directory
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/2p, 480M
|__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/8p, 480M
|__ Port 2: Dev 4, If 0, Class=vend., Driver=, 12M
|__ Port 2: Dev 4, If 1, Class=vend., Driver=, 12M
|__ Port 2: Dev 4, If 2, Class=vend., Driver=, 12M
|__ Port 2: Dev 4, If 3, Class=vend., Driver=, 12M
|__ Port 2: Dev 4, If 4, Class=HID, Driver=, 12M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/2p, 480M
|__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/6p, 480M
|__ Port 1: Dev 3, If 0, Class='bInterfaceClass 0x0e not yet
handled', Driver=uvcvideo, 480M
|__ Port 1: Dev 3, If 1, Class='bInterfaceClass 0x0e not yet
handled', Driver=uvcvideo, 480M
$ lsusb -v
[...]
Bus 002 Device 004: ID 0499:1503 Yamaha Corp.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 8
idVendor 0x0499 Yamaha Corp.
idProduct 0x1503
bcdDevice 1.00
iManufacturer 1
iProduct 2
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 308
bNumInterfaces 5
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 2mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 0
bInterfaceCount 4
bFunctionClass 255 Vendor Specific Class
bFunctionSubClass 0
bFunctionProtocol 0
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 1
bInterfaceProtocol 0
iInterface 0
** UNRECOGNIZED: 0a 24 01 00 01 34 00 02 01 02
** UNRECOGNIZED: 0c 24 02 01 01 01 00 02 03 00 00 00
** UNRECOGNIZED: 09 24 03 02 01 03 00 01 00
** UNRECOGNIZED: 0c 24 02 03 03 06 00 02 03 00 00 00
** UNRECOGNIZED: 09 24 03 04 01 01 00 03 00
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 2
bInterfaceProtocol 0
iInterface 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 2
bInterfaceProtocol 0
iInterface 0
** UNRECOGNIZED: 07 24 01 01 01 01 00
** UNRECOGNIZED: 0b 24 02 01 02 03 18 01 44 ac 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0120 1x 288 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 2
bInterfaceProtocol 0
iInterface 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 2
bInterfaceProtocol 0
iInterface 0
** UNRECOGNIZED: 07 24 01 04 01 01 00
** UNRECOGNIZED: 0b 24 02 01 02 03 18 01 44 ac 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0120 1x 288 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 3
bInterfaceProtocol 0
iInterface 0
** UNRECOGNIZED: 07 24 01 00 01 60 00
** UNRECOGNIZED: 06 24 02 01 01 00
** UNRECOGNIZED: 06 24 02 01 02 00
** UNRECOGNIZED: 06 24 02 01 03 00
** UNRECOGNIZED: 06 24 02 01 04 00
** UNRECOGNIZED: 06 24 02 01 05 00
** UNRECOGNIZED: 09 24 03 01 06 01 01 01 00
** UNRECOGNIZED: 09 24 03 01 07 01 01 01 00
** UNRECOGNIZED: 09 24 03 01 08 01 01 01 00
** UNRECOGNIZED: 09 24 03 01 09 01 01 01 00
** UNRECOGNIZED: 09 24 03 01 0a 01 01 01 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 4
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 1 Keyboard
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.00
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 45
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x85 EP 5 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 16
The modules loaded when I plug the USB cord:
$ dmesg
...
[ 2455.275205] usb 2-1.2: new full speed USB device number 4 using ehci_hcd
[ 2455.387555] input: Yamaha Corporation Yamaha MOX6/MOX8 as
/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.4/input/input13
[ 2455.387726] generic-usb 0003:0499:1503.0002: input,hidraw0: USB HID
v1.00 Keyboard [Yamaha Corporation Yamaha MOX6/MOX8] on
usb-0000:00:1d.0-1.2/input4
$ diff before_plug.txt after_plug.txt
1a2,3
> usbhid 47198 0
> hid 95463 1 usbhid
I reported a bug cause I think this isn't the expected module for a USB
audio card:
https://bugs.launchpad.net/ubuntu/+source/module-init-tools/+bug/905552
If I remove the module:
$ sudo modprobe -r usbhid
and I load the module snd-usb-audio:
$ sudo modprobe snd-usb-audio index=1 vid=0x0499 pid=0x1503
it doesn't get error:
$ dmesg
...
[ 2002.376457] usbcore: deregistering interface driver usbhid
[ 2399.992913] usbcore: registered new interface driver snd-usb-audio
and new modules are loaded:
$ diff lsmod_before_load_snd-usb-audio.txt
lsmod_after_load_snd-usb-audio.txt
1a2,3
> snd_usb_audio 118064 0
> snd_usbmidi_lib 25371 1 snd_usb_audio
12,13c14,15
< snd_hwdep 13668 1 snd_hda_codec
< snd_pcm 96714 3
snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
---
> snd_hwdep 13668 2 snd_usb_audio,snd_hda_codec
> snd_pcm 96714 4
snd_usb_audio,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
19c21
< snd_rawmidi 30547 1 snd_seq_midi
---
> snd_rawmidi 30547 2 snd_usbmidi_lib,snd_seq_midi
32c34
< snd 68266 14
snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
---
> snd 68266 16
snd_usb_audio,snd_usbmidi_lib,snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
but udev doesn't create /dev/snd.
At this point I don't know what can I do. So any help would be appreciated.
Thanks in advance.
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