Mp4a.40.2 -140- Free Jun 2026

mp4a.40.2 explicitly tells a decoder: "This is MPEG-4 Audio, using the AAC Low Complexity profile, with a specific standard configuration."

Extremely old hardware (pre-2008) may struggle, but the -140- profile is considered the "safest" high-quality audio format for web streaming. mp4a.40.2 -140-