PMDGSounds Dynamic Link Library error

There are a few posts that relate to this already but I thought I'd share my experience and "fix"Name: PMDGSounds Dynamic Link LibraryVersion: 10,0,61355,62Company: PMDGFile: PMDG\DLLs\PMDGSounds.dllThe error started occurring after I installed the latest version of the PMDG 747 400X. I had previously been running the JS 4100 and MD11 with no problems. In order to fix a previous instability with fs2crew, I had disabled my default sound card and had only my MS usb headset as the only listed playback device.Duuuuuh, the error only occurs if the headset is not plugged in when I try and start FSX, stands to reason really because in that case there is actually no sound card, it looks like this forms the basis of the error. I could investigate further with changing sound devices and installing and de-installing PMDG products but my problem is obviously fixed.