Adobe Audition M4a -

| Feature | MP3 (MPEG-1 Layer III) | M4A (MPEG-4 AAC) | | :--- | :--- | :--- | | | Lower; requires ~192kbps for transparency. | Higher; requires ~128kbps for transparency. | | Frequency Response | Hard cutoff typically at 16kHz-20kHz. | Sharper cutoffs, better preservation of high frequencies. | | Audition Processing | Native support, rapid seeking. | Native support, slightly higher CPU overhead for decoding. | | Export Speed | Faster encoding times. | Slightly slower encoding times due to complexity of AAC algorithm. |

: If you encounter issues opening an M4A file, ensure that "DLMS Format support" is enabled under Edit > Preferences > Media & Disk Cache . adobe audition m4a