07.09.2021, 23:00
Problem was that some times it could happen that sox used 'sox' as output format, but ffmpeg expected 'wav' as input format. Main problem was to reproduce the problem and not overlook it issue. 
Cu Selur
Ps.: send you a new link to a dev version which might fix the version detection issue on MacOS.
Cu Selur
Ps.: send you a new link to a dev version which might fix the version detection issue on MacOS.
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Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.