Audio Formats

Transform supports the following audio Format identifiers:

Advanced Audio Coding

The AAC format supports the following encoder configuration properties:

Property	Type	Description
`BitRate`	integer	`6000`, `7000`, `8000`, `10000`, `12000`, `14000`, `16000`, `20000`, `24000`, `28000`, `32000`, `40000`, `48000`, `56000`, `64000`, `80000`, `96000`, `112000`, `128000`, `160000`, `192000`, `224000`, `256000`, `320000`, `384000`, `448000`, `512000`, `640000`, `768000`, `896000`, `1024000`
`Profile`	enum	`lc` Low Complexity `hev1` High Efficiency V1 `hev2` High Efficiency V2 (Parametric Stereo)
`MpegVersion`	integer	`0` MPEG-2 `1` MPEG-4

The AC-3 and EAC-3 formats supports the following encoder configuration properties:

Property	Type	Description
`AudioCodingMode`	enum	See the Channel Configuration table blow.
`EnableLowFrequencyEffects`	boolean	See the Channel Configuration table blow.
`BitRate`	integer	`32000` `40000` `48000` `56000` `64000` `80000` `96000` `112000` `128000` `160000` `192000` `224000` `256000` `32000` `384000` `448000` `512000` `576000` `640000`
`DialogNormalization`	integer	Value in the range `1` to `31` representing a dialog normalization level between -1 and -31 dBFS.

See Audio Encoders for additional properties.

The following channel configurations are supported:

Channel Configuration	`AudioCodingMode`	`EnableLowFrequencyEffects`
1+1	`0`	`false`
1/0 C	`1`	`false`
2/0 L R	`2`	`false`
3/0 L C R	`3`	`false`
3/0 L C R LFE	`3`	`true`
2/1 L R Cs	`4`	`false`
2/1 L R Cs LFE	`4`	`true`
3/1 L C R Cs	`5`	`false`
3/1 L C R Cs LFE	`5`	`true`
2/2 L R Ls Rs	`6`	`false`
2/2 L R Ls Rs LFE	`6`	`true`
3/2 L C R Ls Rs	`7`	`false`
3/2 L C R Ls Rs LFE	`7`	`true`
3/4 L C R Ls Rs Lrs Rrs	`21`	`false`
3/4 L C R Ls Rs Lrs Rrs LFE	`21`	`true`

The MPEG audio format supports the following encoder configuration properties: