AAC to FLAC for Music Production

FLAC is a session format, which is exactly what you want. It imports into Pro Tools, Logic, Ableton, Reaper, and FL Studio with no re-encoding, scrubs instantly, and cuts sample-accurately — no decode step sitting between you and the waveform.

Sample rate and channel layout are preserved exactly — stereo stays stereo, 48 kHz stays 48 kHz, and nothing is silently resampled behind your back. That matters when you are lining audio up against picture or against other stems.

Never send an MP3 to a distributor or streaming platform. They transcode whatever you upload into their own formats, so handing them an already-compressed file stacks a second lossy generation onto what your listeners actually hear. Deliver lossless; convert to lossy for humans.

The file gets bigger — roughly 4× — because FLAC stores about 5 MB per minute against AAC's 1.2. For a working file that's irrelevant. AAC is lossy, and the detail its encoder discarded is gone permanently — converting to FLAC cannot restore it. What you gain is that nothing you do afterwards costs any further quality.

Most people meet AAC through HLS streaming segments. It is a fine format there; the trouble is that a bare .aac stream lacks the container index that tells software its duration, so players won't list it and editors import it wrong. FLAC is the destination when you need uncompressed, edit-ready audio that every DAW and editor accepts. Budget for roughly 5 MB per minute — about 4× what the AAC took. You're trading disk for a format that tools actually accept. One honest note on this exact pair: AAC is already lossy, so moving to FLAC cannot restore detail the AAC encoder discarded — it hands you an uncompressed container, not better audio, and the value is a loss-free chain from here on.