Once again thank you for responding. 

I'm making some headway, pvanal is writing .pvx file now but huge and with errors. I'm using variations of:

-U pvanal  -n,16 -w,1  "001.wav"
-o/storage/emulated/0/001.pvx

but file is huge and then I run out of memory. 001.wav is only 2 seconds long. Message output can be viewed here. 

https://drive.google.com/file/d/1VSq8-H7GVIv1kFNgSCz_KBjlS8pGwACZ/view?usp=drivesdk

I'm not a programmer but have used computers since DOS, so not completely illiterate in command lines, but some of this is still a large learning curve for me. 

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