Emulator

Game: RFEP01 (Fire Emblem: Radiant Dawn [PAL])

After a while (random, typically an hour or so) the sound starts glitching, it blares static noise. By lucky chance, it happened during a narrated segment once and I realised that Dolphin was playing the audio track multiple times simultaneously, slightly out of sync with each other, so the static is caused by over-saturation. (i.e. instead of the sequence of sound "A. B. C." it was "A-A-B-A-B-C-B-C-C").

This is with the LLE-Recompiler DSP using XAudio2/DirectSound [both do it] on Windows 7 x64, x64 Dolphin build. The problem has existed for a while, it didn't start on any particular revision that I know of.

[I use DSP on a Thread but turning that off just drops the frame-rate a bit and it still happens anyway]

You can fix the problem temporarily by creating a save-state then stopping emulation and starting it again, reload the save-state and the problem is gone. (Loading the save-state without stopping emulation doesn't help, loading a save-state from before the problem started doesn't stop it either). It will also generally go away on its own if you persevere for 10-20 minutes.

Relevant Hardware:
Intel i7-920 @Stock (2.66GHz)
Creative Audigy 4