In Avidemux, go to and try adding the WAV file. 2. Check Sample Rates
If you have many files or want a guaranteed fix, use FFmpeg to "clean" the audio track for Avidemux: avidemux+cannot+use+that+file+as+audio+track
ffmpeg -i input_audio.mp3 -vn -acodec pcm_s16le -ar 44100 output_audio.wav This command: Removes video data ( -vn ) Converts to standard PCM 16-bit ( -acodec pcm_s16le ) Sets the rate to 44.1kHz ( -ar 44100 ) In Avidemux, go to and try adding the WAV file