This is not a problem (for me); I filed it here for future reference.
Following the advice in “FFmpeg library: not recognised” I installed both foobar2000_v1.6.10.exe and FFmpeg_v2.2.2_for_Audacity_on_Windows_64bit.
Both managed to convert my AAC recording (from the VoiceRecorder Ap on the Android smart phone) to MP3.
(1) foobar created at 10MB file but reported errors
(2) FFmpeg created a 15MB file and reported no errors
I could not spot a difference between the two MP3 files; both began with mt pulling the door shut on a 15-munute walk and both ended with me pulling my door shut on my return home.
FLAC files may be 8, 16 or 24 bits per sample. 16-bit FLAC are the most common. If the Foobar file is 16-bit and the FFmpeg file is 24-bit, that would account for the size difference. You could check the file formats here: MediaInfoOnline - MediaInfo in your browser
Thank you, Steve. That might explain the size difference.
I quoted the sizes with the error in case anyone else was puzzled.
All of this was a major step for me because, until this week, I had not known how to convert (and hence edit, or make use of) an audio file produced by the Android VoiceRecorder ap (Voice Recorder_v3.08_apkpure.com.apk).
Of course, I deleted my test files after the experiment , but I will make two more and test them against MediaInfoOnline.
Thanks again.
Chris
Both managed to convert my AAC recording (from the VoiceRecorder Ap on the Android smart phone) to MP3.
Note you’re converting between two different compressed formats. That and software that manages AAC should be able to manage all the AAC formats, not just mono or stereo from your voice recorder.
, but I will make two more and test them against MediaInfoOnline.