NAudio.MmException: NoDriver calling waveOutSetVolume

[SMSapereAude]

Hello,

I'm getting random exception, when I'm changing WaveOutEvent volume, during longer runs of my program (>24h). I'm using WaveOut as my output driver.

Environment, where this issue could be reproduced is Lenovo ThinkPad 10 (Type 20E3). Device paths for device outputs are: SWD\MMDEVAPI\{0.0.0.00000000}.{9065EB97-5291-4481-9DC0-C8CB3CC08DBD} (Intel SST Audio Device) SWD\MMDEVAPI\{0.0.0.00000000}.{2B7EF839-49FB-49E1-97CC-0CF0A6A6B26C} (ThinkPad TabletDock)

Issue context is, that I'm trying to do volume fade-in:

if (breakPlayTime <= 30)
{
    player.Volume = (float) breakPlayTime / 30f; // exception originates from this line - basically I'd like to do fade-in using this line
}
else
{
    player.Volume = 1;
}

Here's exception stack trace:

NAudio.MmException: NoDriver calling waveOutSetVolume
   w NAudio.Wave.WaveOutUtils.SetWaveOutVolume(Single value, IntPtr hWaveOut, Object lockObject)
   w RTOR.RtorBreakPlayer.Start() w S:\rtor-tablet-client\RtorBreakPlayer.cs:wiersz 118
   w System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   w System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   w System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   w System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   w System.Threading.ThreadHelper.ThreadStart()

Let me know if you need additional context related to app logic, and/or additional code snippets. Thanks!

Sebastian

[SMSapereAude]

Closing issue, as workaround specific to target environment was found. Code change in NAudio wouldn't do much

[jooapa]

whats the workaround, what did you do, I pretty much have this same problem. Unhandled exception. NAudio.MmException: NoDriver calling waveOutRestart at NAudio.Wave.WaveOutEvent.Resume()

[SMSapereAude]

Hi @jooapa,

mine workaround was basically forcing in particular audio device:

for (int n = -1; n < WaveOut.DeviceCount; n++)
{
    var caps = WaveOut.GetCapabilities(n);
    Console.WriteLine($"{n}: {caps.ProductName}"); // in my app, I was checking if I had device called "Intel SST Audio Device"
}

Since we're working with tablet devices, when we were performing WinMM calls during putting tablet to the docking station, it was switching to "ThinkPad TabletDock". This has caused loss of MM handle to original device - hence the source of NoDevice error. This can't be fixed on NAudio level, as it forwards calls to WinMM native API.

During creation of WaveOutEvent, we've requested the device based on the check above:

WaveOutEvent player = new WaveOutEvent { 
    DeviceNumber = ??? // you take the matching device number from "for" loop above
};

Mine use case is little bit different though (as you try to resume playback, we tried to set the playback volume to mimic fade-in/fade-out). We've opened pull request with carry-over from our NAudio patch aiding implementation of proper logic after fade-in/fade-out completion - https://github.com/naudio/NAudio/pull/1136

I hope that this could help. Don't hesitate to contact me if you need help!

[jooapa]

Thanks man, bro is a legend 🙏