[Q] CM 12.1 works Great, Except For Audio... topic

Running cm-12.1-20150511-NIGHTLY-jfltetmo on my wife's S4.
Everything works well enough - including audio/phone (music, buttons, alarms, calling). HOWEVER. After a few hours, the audio just "stops" working - no more sounds of any kind; audio or calling. Music and alarms (this last part sucks) do not work. Rebooting the phone fixes the issue - but only for a few hours or so.

My logcat shows:

Code:

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05-12 07:43:13.738 E/alsa_pcm(232): cannot prepare channel: errno =-22
05-12 07:43:13.738 E/AudioStreamOutALSA(232): pcm_write returned error -22, trying to recover
05-12 07:43:13.748 D/ALSADevice(232): close: handle 0xb587a680 h 0x0
05-12 07:43:13.748 D/ALSADevice(232): open: handle 0xb587a680, format 0x2
05-12 07:43:13.748 D/ALSADevice(232): Device value returned is hw:0,0
05-12 07:43:13.758 D/ALSADevice(232): handle->format: 0x2
05-12 07:43:13.758 D/ALSADevice(232): setHardwareParams: reqBuffSize 2048 channels 2 sampleRate 48000
05-12 07:43:13.758 D/ALSADevice(232): setHardwareParams: buffer_size 16384, period_size 2048, period_cnt 8

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I've wiped data & cache/dalvik; tried 5 different nightlies (versions older than a week aren't available anymore), problem persists!
Wife is getting pissed, probably going to go back to stock soon.

Any ideas? Thanks!

xda-developers