walContext.playSamples() can take a when argument. It permits to start the playback in the middle of the composition created by the samplesArr. The start is shifted and if the start + the duration of a sample is less than the when value, the sample won't be played.
walContext.playSamples() can take a when argument. It permits to start the playback in the middle of the composition created by the samplesArr. The start is shifted and if the start + the duration of a sample is less than the when value, the sample won't be played.

GridSound/gs-webaudio-library