When might the SoundBufferRecorder not record?

[Jebbs]

This might not be relevant anymore as my binding is still in 2.0 land, but I was curious when sound recording with the SoundBufferRecorder might not work.

Here's some context:

I'm using the sfSoundBufferRecorder methods from CSFML. No matter what I do, I can't seem to record anything. Thinking it might be some strange C++ to D thing I have altered sfSoundBufferRecorder_getBuffer to write the duration of the sf::SoundBuffer to the console before it updates the sfBuffer, but even there, it is always 0 as nothing was apparently recorded. sfSoundRecorder_isAvailable does return true, so I'm a little stumped.

Has any of this changed between 2.0 and 2.1? Could it have something to do with my own computer? Any help would be great.

[Laurent]

No, nothing has changed. You should write a complete and minimal code in C++ so that we can investigate the problem.

[Jebbs]

No, nothing has changed. You should write a complete and minimal code in C++ so that we can investigate the problem.

If that's the case then I'm probably doing something wrong somewhere. Once I have a chance I'll write the same thing in C++ to confirm.

[Jebbs]

It occurred to me that I introduced a small bug in my binding that was causing sf::err not to write to anything, but that itself isn't important to this problem. What I discovered  once I could again see errors was that I now get the "Failed to open the audio capture device" error, though I am not sure why. I have successfully recorded on my system before.

What are some reasons that the capture device might fail to open?