M-Audio Keystation 49 MK3 recognized but no MIDI events received

[Nephiel]

This MIDI keyboard model is class compliant and seems to be recognized, but no MIDI events are received at all.

Here is the USB_MIDI_dump with #define DEBUG_USB_HOST :

MIDI Init
Addr:01
VID:0763 PID:3110 #Conf:01

Conf:01 Int:00 Alt:00 EPs:00 IntCl:01 IntSubCl:01
No MIDI Device

Conf:01 Int:01 Alt:00 EPs:02 IntCl:01 IntSubCl:03
MIDI Device
-EPAddr:81 bmAttr:02 MaxPktSz:40
Endpoint descriptor:
 Length:	09
 Type:		05
 Address:	81
 Attributes:	02
 MaxPktSize:	0040
 Poll Intrv:	00
-EPAddr:02 bmAttr:02 MaxPktSz:40
Endpoint descriptor:
 Length:	09
 Type:		05
 Address:	02
 Attributes:	02
 MaxPktSize:	0040
 Poll Intrv:	00

NumEP:03
Conf:01
EPin :81
EPout:02
Init done.
VID:0763, PID:3110

Tried all of the keys, wheels, fader and buttons, but nothing appears on the dump after this point.

USBH_MIDI_desc output:

VID:0763, PID:3110
Start


01
--

Device descriptor: 
Descriptor Length:	12
Descriptor type:	01
USB version:		0110
Device class:		00
Device Subclass:	00
Device Protocol:	00
Max.packet size:	08
Vendor  ID:		0763
Product ID:		3110
Revision ID:		0105
Mfg.string index:	01
Prod.string index:	02
Serial number index:	00
Number of conf.:	01

Configuration descriptor:
Total length:		0085
Num.intf:		02
Conf.value:		01
Conf.string:		00
Attr.:			C0
Max.pwr:		32

Interface descriptor:
Intf.number:		00
Alt.:			00
Endpoints:		00
Intf. Class:		01
Intf. Subclass:		01
Intf. Protocol:		00
Intf.string:		00

<<<AUDIO_CONTROL>>>
Unknown descriptor:
Length:		09
Type:		24
Contents:	01000109000101

Interface descriptor:
Intf.number:		01
Alt.:			00
Endpoints:		02
Intf. Class:		01
Intf. Subclass:		03
Intf. Protocol:		00
Intf.string:		00

<<<MIDIStreaming>>>

MS Interface descriptor
07240100016100
DescriptorSubtype: 01
USB_DESCRIPTOR_CS_INTERFACE :	MS_HEADER
MIDIStreaming SubClass Specification Release number: 0100
wTotalLength:		0061

MS Interface descriptor
06240201010E
DescriptorSubtype: 02
USB_DESCRIPTOR_CS_INTERFACE :	MIDI_IN_JACK(Embedded)
JackType:	01
JackID:		01

MS Interface descriptor
062402020200
DescriptorSubtype: 02
USB_DESCRIPTOR_CS_INTERFACE :	MIDI_IN_JACK(External)
JackType:	02
JackID:		02

MS Interface descriptor
06240201030F
DescriptorSubtype: 02
USB_DESCRIPTOR_CS_INTERFACE :	MIDI_IN_JACK(Embedded)
JackType:	01
JackID:		03

MS Interface descriptor
062402020400
DescriptorSubtype: 02
USB_DESCRIPTOR_CS_INTERFACE :	MIDI_IN_JACK(External)
JackType:	02
JackID:		04

MS Interface descriptor
09240301090102010E
DescriptorSubtype: 03
USB_DESCRIPTOR_CS_INTERFACE :	MIDI_OUT_JACK(Embedded)
JackType:	01
JackID:		09
NrInputPins:	01
02010E

MS Interface descriptor
092403020A01010100
DescriptorSubtype: 03
USB_DESCRIPTOR_CS_INTERFACE :	MIDI_OUT_JACK(External)
JackType:	02
JackID:		0A
NrInputPins:	01
010100

MS Interface descriptor
092403010B0104010F
DescriptorSubtype: 03
USB_DESCRIPTOR_CS_INTERFACE :	MIDI_OUT_JACK(Embedded)
JackType:	01
JackID:		0B
NrInputPins:	01
04010F

MS Interface descriptor
092403020C01030100
DescriptorSubtype: 03
USB_DESCRIPTOR_CS_INTERFACE :	MIDI_OUT_JACK(External)
JackType:	02
JackID:		0C
NrInputPins:	01
030100

Endpoint descriptor:
Endpoint address:	81
Attr.:			02(Bulk)
Max.pkt size:		0040
Polling interval:	00

MS Endpoint descriptor
06250102090B
USB_DESCRIPTOR_CS_ENDPOINT :	MS_GENERAL
bNumEmbMIDIJack: 02
090B

Endpoint descriptor:
Endpoint address:	02
Attr.:			02(Bulk)
Max.pkt size:		0040
Polling interval:	00

MS Endpoint descriptor
062501020103
USB_DESCRIPTOR_CS_ENDPOINT :	MS_GENERAL
bNumEmbMIDIJack: 02
0103


Addr:1(0.0.1)

And the output of lsusb -vvv:

Bus 001 Device 057: ID 0763:3110 M-Audio 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0 
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x0763 M-Audio
  idProduct          0x3110 
  bcdDevice            1.05
  iManufacturer           1 M-Audio
  iProduct                2 Keystation 49 MK3
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0085
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xc0
      Self Powered
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      1 Control Device
      bInterfaceProtocol      0 
      iInterface              0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdADC               1.00
        wTotalLength       0x0009
        bInCollection           1
        baInterfaceNr(0)        1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         1 Audio
      bInterfaceSubClass      3 MIDI Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      MIDIStreaming Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdADC               1.00
        wTotalLength       0x0061
      MIDIStreaming Interface Descriptor:
        bLength                 6
        bDescriptorType        36
        bDescriptorSubtype      2 (MIDI_IN_JACK)
        bJackType               1 Embedded
        bJackID                 1
        iJack                  14 Keystation 49 MK3(USB MIDI)
      MIDIStreaming Interface Descriptor:
        bLength                 6
        bDescriptorType        36
        bDescriptorSubtype      2 (MIDI_IN_JACK)
        bJackType               2 External
        bJackID                 2
        iJack                   0 
      MIDIStreaming Interface Descriptor:
        bLength                 6
        bDescriptorType        36
        bDescriptorSubtype      2 (MIDI_IN_JACK)
        bJackType               1 Embedded
        bJackID                 3
        iJack                  15 Keystation 49 MK3(Transport)
      MIDIStreaming Interface Descriptor:
        bLength                 6
        bDescriptorType        36
        bDescriptorSubtype      2 (MIDI_IN_JACK)
        bJackType               2 External
        bJackID                 4
        iJack                   0 
      MIDIStreaming Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (MIDI_OUT_JACK)
        bJackType               1 Embedded
        bJackID                 9
        bNrInputPins            1
        baSourceID( 0)          2
        BaSourcePin( 0)         1
        iJack                  14 Keystation 49 MK3(USB MIDI)
      MIDIStreaming Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (MIDI_OUT_JACK)
        bJackType               2 External
        bJackID                10
        bNrInputPins            1
        baSourceID( 0)          1
        BaSourcePin( 0)         1
        iJack                   0 
      MIDIStreaming Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (MIDI_OUT_JACK)
        bJackType               1 Embedded
        bJackID                11
        bNrInputPins            1
        baSourceID( 0)          4
        BaSourcePin( 0)         1
        iJack                  15 Keystation 49 MK3(Transport)
      MIDIStreaming Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (MIDI_OUT_JACK)
        bJackType               2 External
        bJackID                12
        bNrInputPins            1
        baSourceID( 0)          3
        BaSourcePin( 0)         1
        iJack                   0 
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
        bRefresh                0
        bSynchAddress           0
        MIDIStreaming Endpoint Descriptor:
          bLength                 6
          bDescriptorType        37
          bDescriptorSubtype      1 (GENERAL)
          bNumEmbMIDIJack         2
          baAssocJackID( 0)       9
          baAssocJackID( 1)      11
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
        bRefresh                0
        bSynchAddress           0
        MIDIStreaming Endpoint Descriptor:
          bLength                 6
          bDescriptorType        37
          bDescriptorSubtype      1 (GENERAL)
          bNumEmbMIDIJack         2
          baAssocJackID( 0)       1
          baAssocJackID( 1)       3
can't get debug descriptor: Resource temporarily unavailable
Device Status:     0x0001
  Self Powered

Let me know if I can help get this keyboard model supported.

[YuuichiAkagawa]

Do you have enough power ?
Can you try connecting via a Powered USB hub?

Please check inTransfer() return value.

USBH_MIDI/usbh_midi.cpp

Lines 377 to 379 in 808b5a1

	uint8_t r = pUsb->inTransfer(bAddress, epInfo[epDataInIndex].epAddr, bytes_rcvd, dataptr);
	if( *bytes_rcvd < (MIDI_EVENT_PACKET_SIZE-4)){

↓ insert #ifdef - #endif

        uint8_t  r = pUsb->inTransfer(bAddress, epInfo[epDataInIndex].epAddr, bytes_rcvd, dataptr);
#ifdef DEBUG_USB_HOST
        if( r )
                USBTRACE2("inTransfer():", r);
#endif
        if( *bytes_rcvd < (MIDI_EVENT_PACKET_SIZE-4)){

[Nephiel]

Here's the dump with check in place:

[...]
NumEP:03
Conf:01
EPin :81
EPout:02
Init done.
VID:0763, PID:3110
inTransfer():04
inTransfer():04
inTransfer():04
inTransfer():04
inTransfer():04
inTransfer():04

Steady stream of inTransfer():04 continues after that. Pressing keys has no effect.

Also tested power draw with a meter, Arduino Pro Micro + USB Host board + Keystation MK3 only draw about 60 mA.

[YuuichiAkagawa]

Hmmm
The Keystation 49 MK3 responds to NAK, so USB communication is possible. But I don't understand why it doesn't send MIDI events.

[doctea]

Did a solution to this ever get found? I think I'm having the same problem with an Arturia Beatstep. Here's the output if I enable ENABLE_UHS_DEBUGGING and EXTRADEBUG:

`MIDI Init
USBH_MIDI version 000600
Addr:01
VID:1C75 PID:0206 #Conf:01

STEP1: MIDI Start
Interface descriptor:
Inf#: 00
Alt: 00
EPs: 00
IntCl: 01
IntSubcl: 01
Protocol: 00
-MIDI not found

Interface descriptor:
Inf#: 01
Alt: 00
EPs: 02
IntCl: 01
IntSubcl: 03
Protocol: 00
+MIDI found
>Extracting endpoint
Endpoint descriptor:
Length: 09
Type: 05
Address: 02
Attributes: 02
MaxPktSize: 0040
Poll Intrv: 00
+valid EP found.

Extracting endpoint
Endpoint descriptor:
Length: 09
Type: 05
Address: 81
Attributes: 02
MaxPktSize: 0040
Poll Intrv: 00
+valid EP found.
STEP1: MIDI,NumEP:03
Conf:01
EPin :81
EPout:02
VID:1C75, PID:0206
Init done.
inTransfer():04
SendData():00003746
inTransfer():04
inTransfer():04
inTransfer():04
inTransfer():04
inTransfer():04
[...etc...]
`

(ugh, the >'s break code formatting, but hopefully you get the gist!)

[YuuichiAkagawa]

Try commenting out the following line in Usb.cpp.
https://github.com/felis/USB_Host_Shield_2.0/blob/9184254b87b2c65378ba83d653457a48c01d5396/Usb.cpp#L241-L246

Like this.

                rcode = dispatchPkt(tokIN, pep->epAddr, nak_limit); //IN packet to EP-'endpoint'. Function takes care of NAKS.
                if(rcode == hrTOGERR) {
                        // yes, we flip it wrong here so that next time it is actually correct!
//                        pep->bmRcvToggle = (regRd(rHRSL) & bmRCVTOGRD) ? 0 : 1;
//                        regWr(rHCTL, (pep->bmRcvToggle) ? bmRCVTOG1 : bmRCVTOG0); //set toggle value
                        continue;
                }
                if(rcode) {

[doctea]

Try commenting out the following line in Usb.cpp. https://github.com/felis/USB_Host_Shield_2.0/blob/9184254b87b2c65378ba83d653457a48c01d5396/Usb.cpp#L241-L246

Success! Sending and receiving MIDI note on/offs now seems to work! Thank you! :D

Are there any drawbacks to this modification -- will this have a negative impact on the of other devices? (I've tested it with an Akai APCmini, and that seems to work, but maybe there is a case where it causes a problem?)

I note that although noteon/noteoff messages seems to work fine in both directions, that using MIDI.sendClock() to send clock to the Beatstep doesn't seem to work -- is this perhaps handled in a different function that needs to be similarly modified? I have also tested with an Arturia Keystep, and that DOES receive the MIDI clock OK. [Edit: actually, upon further testing, I'm finding the Beatstep behaving strangely in other ways too - and am starting to think this is to do with the Beatstep configuration itself. I'll explore some more with this over the weekend and see what I can figure out]

[YuuichiAkagawa]

Sorry, I made a mistake in one place, please try again.
Only two lines need to be commented out.

This problem is on the USB_Host_Shield_2.0 side, not the MIDI driver.
felis/USB_Host_Shield_2.0#438

2 . Do not flip toggle value on Toggle Error

Some devices have problems with the initial toggle, and BeatStep is one of them.

will this have a negative impact on the of other devices?

Usually there is no problem.

[doctea]

@doctea Sorry, I made a mistake in one place, please try again. Only two lines need to be commented out.

EDIT -- see below!

Thanks -- I've changed my copy of the library as you suggested here. It doesn't seem to make any difference that I can see, though. The Beatstep still doesn't respond to clock - was this meant to solve this problem? I've been through the settings in the Beatstep control app, hoping to find something like a 'MIDI clock mode' option, but had no such luck, so I don't know what else to try here..

This problem is on the USB_Host_Shield_2.0 side, not the MIDI driver. felis/USB_Host_Shield_2.0#438

Would it be better to solve this problem by applying that pull request to my copy of the USB_Host_Shield_2.0 library rather than commenting out the two lines you suggest?

Edit: so to answer my own confusion! I've applied the above pull request to the USB_Host_Shield_2.0 library (https://patch-diff.githubusercontent.com/raw/felis/USB_Host_Shield_2.0/pull/438.patch) and the Beatstep now seems to be receiving clock!

Steps to apply the patch for anyone who wants to replicate this:-

1. cd libraries/USB_Host_Shield_2.0
2. wget https://patch-diff.githubusercontent.com/raw/felis/USB_Host_Shield_2.0/pull/438.patch
3. patch -p1 < 438.patch

The other part of the puzzle here was that the Beatstep needs to receive an external MIDI start message before it will be clocked externally!

[YuuichiAkagawa]

@doctea
I thought that the cause of not working in BeatStep might be the toggle problem and suggested commenting it out. During my research, I found a pull request for USB_Host_Shield_2.0 and introduced it to you.
If this pull request fix solves the problem, then it should be adopted.

[doctea]

@doctea I thought that the cause of not working in BeatStep might be the toggle problem and suggested commenting it out. During my research, I found a pull request for USB_Host_Shield_2.0 and introduced it to you. If this pull request fix solves the problem, then it should be adopted.

Many thanks for your help, I understand now! Yes it seems to solve the problem and should be adopted :)

[YuuichiAkagawa]

@Nephiel
OK, I purchased Keystation for verification.
I have confirmed that it works in two cases: with an external power supply connected to the Aruduino and through a powered USB hub.

Also tested power draw with a meter, Arduino Pro Micro + USB Host board + Keystation MK3 only draw about 60 mA.

Unfortunately, that is current consumption under stable conditions. This keyboard draws a large current when it is powered on.

I will say it again. You must connect via a powered USB hub.

I've wasted my money, you know. 😭