When switching from conventional audio to digital, the sound is contained in large files, while a CD is only for 70 minutes of music, Dolby has developed a new way of digitizing audio. (digital audio coding).
AC-3 is the name of this third-generation technology that enables coding with lower sample rate but still ensures sound quality. Therefore the capacity of AC-3 audio files is significantly reduced.
In addition, this technology also helps reduce noise sound more effectively by dividing the sound into different frequency bands and then filtering the noise partially.
| Format | Description |
|---|---|
| aac | Advanced Audio Coding |
| mp3 | MPEG-1 Audio Layer 3 |
| m4a | MPEG-4 Audio Book |
| wav | Waveform audio format |
| ogg | Ogg Vorbis Compressed Audio File |
| weba | WebA Audio File |
| wma | Windows Media Audio |
| flac | Free Lossless Audio Codec |
| m4b | MPEG-4 Audio Book |
| m4r | M4R |
| webm | webm |
| mov | mov |
| midi | Musical Instrument Digital Interface |