javax.sound.sampled.LineUnavailableException

[HST]

I've returned to using REW after a bit of a hiatus. I'm running v 5.18 on a Windows 10 system using a Dayton Audio UMM-6 mic. All of a sudden, I am getting the following error message:

SEVERE: Exception trying to open record device
javax.sound.sampled.LineUnavailableException: Microphone (UMM-6) does not have any lines supporting PCM_SIGNED 48000.0 Hz, 16 bit, stereo, 4 bytes/frame, little-endian
javax.sound.sampled.LineUnavailableException: Microphone (UMM-6) does not have any lines supporting PCM_SIGNED 48000.0 Hz, 16 bit, stereo, 4 bytes/frame, little-endian

I'm unable to use REW as a result. Apparently, this is related to Java. So far, I've deleted and re-installed REW and installed the latest version of Java . None of this has helped.

How do I fix?

Thanks

 

[John Mulcahy]

Likely to be a Win 10 build 1803 Privacy settings issue, in which case go to Settings > Privacy > Microphone, and try flipping the toggle under "Allow apps to access your microphone" to On.

 

[HST]

That fixed the issue. Many thanks!

Note to others: you can toggle all of the individual MS apps to "off" and this still works as long as the main "allow apps to access mic" switch is set to "on."