[BUG]: DRV_QUERYDEVICEINTERFACE returns an empty string

[m-komo]

Windows Version

Build 27959.br_release.250926-1432

Service Installation Method

GitHub

SDK version, if appropriate

1.0.13-preview.13.192

Location

Application using WinMM MIDI 1.0 (Classic API)

Type of bug

Application not working as expected

Steps to reproduce

1. Attach any MIDI device to a PC running MidiSrv.
2. Launch the attached MMEQueryDeviceInterface.exe.
   This application calls midiInMessage() API with the DRV_QUERYDEVICEINTERFACE message to retrieve the device-interface name.

Although calling midiInMessage(DRV_QUERYDEVICEINTERFACESIZE) returns non-zero value, midiInMessage(DRV_QUERYDEVICEINTERFACE) returns an empty string.

MMEQueryDeviceInterface_20251008.zip

Expected behavior

Both midiInMessage(DRV_QUERYDEVICEINTERFACE) and midiOutMessage(DRV_QUERYDEVICEINTERFACE) should return a non-empty string representing the device-interface name.

Additional notes

No response

[Psychlist1972]

We are investigating this.

[Psychlist1972]

This may be a blocking issue for November release. I'll update when I have more info.

[Psychlist1972]

It's a blocking issue because of the apps this breaks in its current state.

We're working on implementing this properly, but it takes a bit of work because of the way the MIDI pipeline works, and how WinMM ports are no longer attached directly to the devices, but have a service in-between.

[Psychlist1972]

We have this fixed now. It required a combination of changes to the internal Windows WinMM base implementation as well as to the transports/service and wdmaud2.drv for the new stack.

For ports without a USB parent, we're just returning that UMP Endpoint's Endpoint Device Id.

This isn't something we'd encourage folks to take a new dependency on because it restricts options for customers. For example, they wouldn't be able to use one of these devices as a remote device on a USB-> Network MIDI 2.0 translation box. It's here for backwards compatibility for directly-connected USB devices.

Output from my PC:

--------
Index: 0
Name: ContinuuMini SN024066
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 190)]
\\?\usb#vid_16c0&pid_05e4&mi_00#9&8533d82&0&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 1
Name: LinnStrument MIDI
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_f055&pid_0069&mi_00#9&2aaa469f&0&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 2
Name: ESI MIDIMATE eX
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_001a&mi_00#9&1d1a18a9&0&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 3
Name: MIDIIN2 (ESI MIDIMATE eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_001a&mi_00#9&1d1a18a9&0&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 4
Name: TouchOSC Bridge
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 148)]
\\?\bomebus#bomemidi#01#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\bomemidiin
--------
Index: 5
Name: HDSPe FX MADI1 MIDI
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 232)]
\\?\pci#ven_1d18&dev_3fc7&subsys_00000000&rev_d5#4&2138a283&0&0033#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\hmfxwave1
--------
Index: 6
Name: HDSPe FX MIDI
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 232)]
\\?\pci#ven_1d18&dev_3fc7&subsys_00000000&rev_d5#4&2138a283&0&0033#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\hmfxmidi1
--------
Index: 7
Name: HDSPe FX MADI2 MIDI
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 232)]
\\?\pci#ven_1d18&dev_3fc7&subsys_00000000&rev_d5#4&2138a283&0&0033#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\hmfxmidi3
--------
Index: 8
Name: HDSPe FX MADI3 MIDI
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 232)]
\\?\pci#ven_1d18&dev_3fc7&subsys_00000000&rev_d5#4&2138a283&0&0033#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\hmfxmidi4
--------
Index: 9
Name: Express  128: Port 1
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 180)]
\\?\motuusb64#motumidi64#0300#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\express__128300port0
--------
Index: 10
Name: Express  128: Port 2
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 180)]
\\?\motuusb64#motumidi64#0300#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\express__128300port1
--------
Index: 11
Name: Express  128: Port 3
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 180)]
\\?\motuusb64#motumidi64#0300#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\express__128300port2
--------
Index: 12
Name: Express  128: Port 4
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 180)]
\\?\motuusb64#motumidi64#0300#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\express__128300port3
--------
Index: 13
Name: Express  128: Port 5
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 180)]
\\?\motuusb64#motumidi64#0300#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\express__128300port4
--------
Index: 14
Name: Express  128: Port 6
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 180)]
\\?\motuusb64#motumidi64#0300#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\express__128300port5
--------
Index: 15
Name: Express  128: Port 7
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 180)]
\\?\motuusb64#motumidi64#0300#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\express__128300port6
--------
Index: 16
Name: Express  128: Port 8
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 180)]
\\?\motuusb64#motumidi64#0300#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\express__128300port7
--------
Index: 17
Name: ESI M8U eX
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 18
Name: MIDIIN2 (ESI M8U eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 19
Name: MIDIIN3 (ESI M8U eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 20
Name: MIDIIN4 (ESI M8U eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 21
Name: MIDIIN5 (ESI M8U eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 22
Name: MIDIIN6 (ESI M8U eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 23
Name: MIDIIN7 (ESI M8U eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 24
Name: MIDIIN8 (ESI M8U eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 25
Name: MIDIIN9 (ESI M8U eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 26
Name: MIDIIN10 (ESI M8U eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 27
Name: MIDIIN11 (ESI M8U eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 28
Name: MIDIIN12 (ESI M8U eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 29
Name: MIDIIN13 (ESI M8U eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 30
Name: MIDIIN14 (ESI M8U eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 31
Name: MIDIIN15 (ESI M8U eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 32
Name: MIDIIN16 (ESI M8U eX)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_2573&pid_008a&mi_00#a&323319f5&1&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 33
Name: Moog One
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 194)]
\\?\usb#vid_2662&pid_000d&mi_00#9&102d14a&0&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\usbmidi2
--------
Index: 34
Name: Iridium (MIDI 2.0)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 196)]
\\?\usb#vid_12e6&pid_002c&mi_00#9&222d2435&0&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\usbmidi2
--------
Index: 35
Name: UM-ONE
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 192)]
\\?\usb#vid_0582&pid_0168&mi_00#9&3982e6cb&0&0000#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\global
--------
Index: 36
Name: Default App Loopback (A)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 152)]
\\?\swd#midisrv#midiu_loop_a_default#{e7cce071-3c03-423f-88d3-f1045d02552b}
--------
Index: 37
Name: Default App Loopback (B)
Interface: OK [DRV_QUERYDEVICEINTERFACESIZE (size == 152)]
\\?\swd#midisrv#midiu_loop_b_default#{e7cce071-3c03-423f-88d3-f1045d02552b}