I have several trhousand tracks which I converted from .wma to .flac, using the NCH Switch Sound File Converter app on Windows 11. The converted files appear to be playing on Sonos, but there is no sound.
All ther files are within Sonos limits (44,100khz and 16-bit), and play perfectly well on my phone apps (Rocket Player and Pulsar), so are not corrupted.
I have found that if I open one of the files in Audacity, then simpley export it back again, the file plays in Sonos.
I have contacted the Sonos aupport team, and sent them a diagnostic while one of the tracks is playing, and they confirm multiple errors, so it appears that it is something to do with the Codec and how Sonos is interpreting it.
I do not want to have to manually read and export every file via Audacity, so any suggestions using other software where I can perform a batch reconversion would be appreciated.

