AudioBuffer

js.html.audio.AudioBuffer (extern class)

Objects of these types are designed to hold small audio snippets, typically less than 45 s. For longer sounds, objects implementing the MediaElementAudioSourceNode are more suitable. The buffer contains data in the following format:  non-interleaved IEEE754 32-bit linear PCM with a nominal range between -1 and +1, that is, 32bits floating point buffer, with each samples between -1.0 and 1.0. If the AudioBuffer has multiple channels, they are stored in separate buffer.

Documentation AudioBuffer by Mozilla Contributors, licensed under CC-BY-SA 2.5.

See:

Instance Members

sampleRate: Float

Returns a float representing the sample rate, in samples per second, of the PCM data stored in the buffer.

length: Int

Returns an integer representing the length, in sample-frames, of the PCM data stored in the buffer.

duration: Float

Returns a double representing the duration, in seconds, of the PCM data stored in the buffer.

numberOfChannels: Int

Returns an integer representing the number of discrete audio channels described by the PCM data stored in the buffer.

getChannelData(channel: Int): js.lib.Float32Array

Returns a Float32Array containing the PCM data associated with the channel, defined by the channel parameter (with 0 representing the first channel).

Name Type
channel Int
Returns
js.lib.Float32Array
copyFromChannel(destination: js.lib.Float32Array, channelNumber: Int, ?startInChannel: Int = 0): Void

Copies the samples from the specified channel of the AudioBuffer to the destination array.

Name Type Default
destination js.lib.Float32Array
channelNumber Int
startInChannel Int 0
copyToChannel(source: js.lib.Float32Array, channelNumber: Int, ?startInChannel: Int = 0): Void

Copies the samples to the specified channel of the AudioBuffer, from the source array.

Name Type Default
source js.lib.Float32Array
channelNumber Int
startInChannel Int 0
new(options: AudioBufferOptions): Void
Name Type
options AudioBufferOptions