: At 48kbps, the AAC (Advanced Audio Coding) codec used in M4A files uses aggressive psychoacoustic modeling. It discards frequencies that the human ear struggles to hear to keep the file size minimal.
At a bitrate of , an M4A file of 467.82 KB represents approximately 78 seconds (1 minute and 18 seconds) of audio. 48kbps m4a(467.82 KB)
bitrate_kbps = 48 size_kb = 467.82 # Calculate duration: Size (KB) / (Bitrate (kbps) / 8) duration_seconds = size_kb / (bitrate_kbps / 8) print(f"{duration_seconds=}") Use code with caution. Copied to clipboard : At 48kbps, the AAC (Advanced Audio Coding)