1.3 KiB
1.3 KiB
Volume Transformers
const volume = new prism.VolumeTransformer16LE({
volume: 0.5, // 50% of the original volume
});
// the input is a 16-bit little-endian stream of PCM
const halfVolume = input.pipe(volume);
There are 4 available transformers, all 16-bit/32-bit and little-endian/big-endian:
prism.VolumeTransformer16LEprism.VolumeTransformer32LEprism.VolumeTransformer16BEprism.VolumeTransformer32BE
Constructor
new prism.VolumeTransformerXXYY(options)
options:Object(optional)volume:Number, the volume relative to the input (1 is 100%, 0.5 is 50% etc.)
Properties
transformer.volume
Number - 1 represents 100% of the original input. This shouldn't be set directly, use the methods listed below.
Methods
transformer.setVolume(volume)
volume: Number, the volume
Sets the volume relative to the input stream - i.e. 1 is normal, 0.5 is half, 2 is double.
Returns: void
transformer.setVolumeDecibels(volume)
volume: Number, the volume in decibels
Sets the volume in decibels.
Returns: void
transformer.setVolumeLogarithmic(volume)
volume: Number, a value for the perceived volume
Sets the volume so that a perceived value of 0.5 is half the perceived volume etc.
Returns: void