PASS: 16-verify-tx-consistent.test
FAIL: 17-verify-tx-consistent-float.test
The FAIL is due inconsistency in the .wav header (only for floats)
constructed by libsndfile -- its different every wall-clock second.
Even just a bare header (no audio samples) shows the effect:
minimodem --float-samples --tx 1000 -f /tmp/xx.wav </dev/null
sum -r /tmp/xx.wav
sleep 1
minimodem --float-samples --tx 1000 -f /tmp/xx.wav </dev/null
sum -r /tmp/xx.wav
This might also relate to:
https://github.com/kamalmostafa/minimodem/issues/24