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IlyaMorozov's avatar
IlyaMorozov
Copper Contributor
Nov 14, 2024

MMDevApi.dll bug report (Windows 11 24H2)

I'm the developer of text-to speech (TTS) application, it has been distributed for many years, and there have been no problems with MMDevApi.dll, from Windows XP to Windows 11 23H2. Now I get dozens of complaints about the same situation: a user upgraded Windows 11 to 24H2, and now my program crashes, and in the Event Viewer the error description has a reference to MMDevApi.dll.

Problems detected:

  1. The text-to-speech program crashes if the list of audio output devices is changed.
  2. The text-to-speech program crashes if a computer voice starts reading text aloud (voices for SAPI 5 are used).
  3. The text-to-speech program does nothing, a user runs any audio/video player, and the text-to-speech program crashes.

The first point is obvious: the program uses IMMDeviceEnumerator interface to keep track of changes in the list of output audio devices. If the list changes, my program crashes in Win11 24H2. The cause of the problem is the MMDevApi.dll system library. Win11 23H2 and previous versions of the operating system did not have this problem.

Interesting discovery was made by one of the users: if you launch the “Windows 11 Media Player” application and keep it open, and then launch the text-to-speech program, the program works stably (the TTS program does not crash).

Re-registering the MMDevApi.dll system library did not help. Changing the compatibility mode for the EXE-file to “Windows 10” did not help.

As far as I know, the developers of several other TTS programs have encountered the same problem. Apparently the problem is related to a library MMDevApi.dll in the 24H2 update, but what to do and how to fix it is unclear. Please, help!

Here is the error information in the Event Viewer.

Log Name:      Application
Source:        Application Error
Date:          10/31/2024 11:07:11 AM
Event ID:      1000
Task Category: Application Crashing Events
Level:         Error
Faulting application name: balabolka.exe, version: 2.15.0.880, time stamp: 0x671d5513
Faulting module name: MMDevApi.dll, version: 10.0.26100.1882, time stamp: 0xbe6f88f4
Exception code: 0xc0000005
Fault offset: 0x0002564d
Faulting process id: 0x264C
Faulting application start time: 0x1DB2B41EE0B94D1
Faulting application path: C:\Program Files (x86)\Balabolka\balabolka.exe
Faulting module path: C:\WINDOWS\System32\MMDevApi.dll
Report Id: 0def1e0f-f143-4998-840b-4573e20dcd0e
Faulting package full name:
Faulting package-relative application ID:
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
   <System>
     <Provider Name="Application Error" Guid="{a0e9b465-b939-57d7-b27d-95d8e925ff57}" />
     <EventID>1000</EventID>
     <Version>0</Version>
     <Level>2</Level>
     <Task>100</Task>
     <Opcode>0</Opcode>
     <Keywords>0x8000000000000000</Keywords>
     <TimeCreated SystemTime="2024-10-31T03:07:11.0418263Z" />
     <EventRecordID>1889</EventRecordID>
     <Correlation />
     <Execution ProcessID="16332" ThreadID="6424" />
     <Channel>Application</Channel>
   </System>
   <EventData>
     <Data Name="AppName">balabolka.exe</Data>
     <Data Name="AppVersion">2.15.0.880</Data>
     <Data Name="AppTimeStamp">671d5513</Data>
     <Data Name="ModuleName">MMDevApi.dll</Data>
     <Data Name="ModuleVersion">10.0.26100.1882</Data>
     <Data Name="ModuleTimeStamp">be6f88f4</Data>
     <Data Name="ExceptionCode">c0000005</Data>
     <Data Name="FaultingOffset">0002564d</Data>
     <Data Name="ProcessId">0x264c</Data>
     <Data Name="ProcessCreationTime">0x1db2b41ee0b94d1</Data>
     <Data Name="AppPath">C:\Program Files (x86)\Balabolka\balabolka.exe</Data>
     <Data Name="ModulePath">C:\WINDOWS\System32\MMDevApi.dll</Data>
     <Data Name="IntegratorReportId">0def1e0f-f143-4998-840b-4573e20dcd0e</Data>
     <Data Name="PackageFullName">
     </Data>
     <Data Name="PackageRelativeAppId">
     </Data>
   </EventData>
</Event>

  • wiamwomoq09sdq's avatar
    wiamwomoq09sdq
    Copper Contributor

    Currently, ZEE5 doesn't provide any option for you to contact ZEE5 customer care number. The only way for you to reach out to our

  • IlyaMorozov's avatar
    IlyaMorozov
    Copper Contributor

    Thanks to the help of users, it was possible to gather more information about the problem in the 24H2 update. If the user's monitor contains speakers, if the graphics card and the monitor are connected with an HDMI cable that transmits sound – this leads to unstable work of the text-to-speech program, it periodically crashes, and in the event log the MMDevApi.dll system library is specified as the cause of the crash. But if the user connects speakers or headphones to the audio jack on the motherboard of the same computer, the text-to-speech program works stably. So, the problem is neither in the MMDevApi.dll library nor in the text-to-speech program, but in some driver inside the 24H2 update. Until Microsoft developers fix the problem, here's the situation: if you installed the 24H2 update for Windows 11 and the text-to-speech application starts crashing, connect your audio output device to a different port on your computer.

    Here is the information about the user's computer configuration.

    1)Video Adapter-------------------------
    Video Chipset: NVIDIA GeForce GTX 1650 Super
    Video Memory: 4096 MBytes of GDDR6 SDRAM [Micron]
    Video Card: ASUS GTX 1650 Super
    Video Bus: PCIe v3.0 x16 (8.0 GT/s) @ x16 (8.0 GT/s)
    GPU Type: Discrete
    Video BIOS Version: 90.16.46.00.47 [UEFI]
    Driver Manufacturer: NVIDIA
    Driver Version: 32.0.15.6614 (GeForce 566.14)
    Driver Date: 06-Nov-2024
    2)Monitor----------------------------
    Monitor Name: LG [Unknown Model: GSM5B08]
    Monitor Name (Manuf): LG Ultra HD
    Input Signal: Digital
    Driver Manufacturer: Microsoft
    Driver Description: Generic PnP Monitor
    Driver Version: 10.0.26100.1882
    Driver Date: 21-Jun-2006
    3) Audio--------------------------------
    a) Audio Adapter: Intel Kaby Lake - High Definition Audio / cAVS (Audio, Voice, Speech)
    High Definition Audio Codec: Intel
    Driver Manufacturer: Intel(R) Corporation
    Driver Description: Intel(R) Display Audio
    Driver Version: 10.27.0.10
    Driver Date: 16-Apr-2021
    High Definition Audio Codec: RealTek ALC899
    Driver Manufacturer: Realtek Semiconductor Corp.
    Driver Version: 6.0.1.8248
    Driver Date: 05-Sep-2017
    b) Audio Adapter: NVIDIA TU116 - High Definition Audio Controller
    High Definition Audio Codec: nVidia
    Driver Manufacturer: NVIDIA Corporation
    Driver Description: NVIDIA High Definition Audio
    Driver Version: 1.4.2.6
    Driver Date: 26-Sep-2024

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