AVI is the veteran of desktop video: dependable in 1995, cranky about everything invented since. It was born in 1992, Microsoft, and its real weak spot is modern life: no proper streaming, no subtitles, no love for modern codecs.
Whatever the recording, audio just wants to be heard: the trick is picking a shape that plays where you need it. Stands in for any audio format Flippy can read: MP3, WAV, FLAC, AAC and friends. That makes it the right destination when what you need is any sound file: music, voice memos, podcasts, session exports.