# Audio Specifications

## Specifications

* Supported formats: mp3, wav, ogg, m4a, m4r, wma, opus, flac, aac, amr
* File size limit:\
  \- Free/Starter: within 10 MB\
  \- Pro: within 30 MB\
  \- Enterprise : within 50 MB

***

## Best Optimization Method

### Set an appropriate audio bitrate

* Generally, use a standard audio bitrate of 128 kbit/s.
* If the audio file is still too large, you can reduce it to 64 kbit/s or 96 kbit/s, but it is not recommended to go below 64 kbit/s.
* If the sound quality is noticeably degraded, you may increase the bitrate appropriately, such as 192 kbit/s.

### Choose an appropriate audio sampling rate

* Generally, use the standard sampling rate of 44.1 kHz.
* If the audio file is still too large, you may reduce it to 22.05 kHz, but it is not recommended to go below 22.05 kHz.

### Set an appropriate number of channels

* Normally, choose stereo (dual-channel).
* If the audio file is still too large, you can set it to mono (single-channel).