: You can store roughly four times as much audio compared to a standard 192kbps MP3 while maintaining reasonable intelligibility.
: Instead of trying to encode every high-frequency detail (which would require more data), the encoder only records the lower frequencies. 48kbps m4a(-1 B)
: This allows for near-CD quality speech and acceptable music quality at very small file sizes, making it ideal for mobile data streaming and voice memos. Technical Context for "48kbps" : You can store roughly four times as