For transcription, Wavve supports any modern audio or video format. For video, Wavve supports mp3, mp4, wav, m4a, flac, and ogg files. It is recommended that audio files are kept to under 50MB. We will warn you of longer processing times over 75MB, but you can import up to 150MB files if you are feeling lucky. Some mobile browsers have upper limits on memory of 100MB, so your experience may vary. Also, keep in mind that the m4a format is a less reliable format and may not process properly. You can also convert your files into a compatible mp3 format here: https://cloudconvert.com/