ASIO4ALL starts skipping after a while, doesn't stop

[KilroyWasHere]

After 30-40 minutes the audio starts to crackle. It continues crackling until you reset the sample length in ASIO4ALL settings, then works fine for another 30-40 minutes. I can't see any buffer underruns in my host (FL Studio).

I am having issues on multiple computers. (A laptop and stationary.)

The only thing I can think of is having a USB microphone plugged in, also on ASIO4ALL (Samson Q1U) - but can a microphone cause the OUTPUT interface to skip?

I saw this thread but I don't think it's the same problem because mine does not improve after a while.
mtippach.proboards.com/thread/2620/asio4all-skips-after-longer-time

Thanks!

[KilroyWasHere]

PS.

Sorry I understand the problem description is vague. The audio cards are unknown to me (both are built-in "HD Audio"-type interfaces.)

I just wonder if there is known issues with skipping after some time, and also if microphones can cause the output interface to skip. Thanks again!

[Chris]

More than 1 sound card (...different clocks)?