el.table([props], t)

Loads a lookup table which is then read from with a position determined by the incoming signal phase. The table can either be loaded directly or from a file on disk.

The lookup position is given as a normalized phase value with linear interpolation for lookup positions that fall between two distinct values. For example, driving a lookup table with a simple phasor will sweep through the entire lookup table at the rate of the phasor (this example is great for wavetable synthesis). To read only a partial segment of the wavetable, you can multiply and add to the phasor such that the table sweeps through just the desired segment.

Because each Elementary node has strictly one channel output, the channel prop can be used to decide which channel from the sample to propagate. In the example below, if kick.wav is a stereo wav file sample, the sample node here will only play the right channel.

Example:

// Sweep the whole table, as in wavetable synthesis
el.table({path: '/path/to/squareWaveTable.wav'}, el.phasor(220));

// Or to sweep a specific segment
el.table({path: '/path/to/padSound.wav'}, el.add(0.1, el.mul(0.1, el.phasor(1))));

Props

Name	Default	Type	Description
path	''	String	The location of the sample file on disk
data	null	Array or Float32Array	Manually constructed lookup table data
channel	0	Number	The channel to read from the sample

• Note: the path, channel, and data prop are all related in that their job is to provide a resource from which to load the lookup table
  • Providing a path property will first attempt to look the file up in the pre-loaded virtual file system, then fall back to a disk-read if running on a target that has disk access (i.e. the Plugin Dev Kit).
  • When falling back to a read from disk, the channel property will specify which channel from a multi-channel sample file to load. el.table outputs a mono signal, so you must choose which channel you want to read from the underlying file.
  • When providing the data property, you'll pass either an Array or a Float32Array containing the raw buffer to be loaded into the lookup table. This is a great solution for a quick hack or a small array, but any large arrays should preferably be loaded into the virtual file system ahead of time.
  • Behavior is undefined when both the path and the channel prop are provided.