Gives each AudioParam a new attribute, automationRate that allows the user to select whether the AudioParam is either "a-rate" or "k-rate". Most but not all AudioParams allow changing the rate (as given in the spec). For example, BiquadFilterNode with default "a-rate" automation is very expensive to compute due to the complex relationship between the parameters and the filter coefficients. If this fast automation is not needed (the most typical case), the parameters can be set to "k-rate".



Specification link

Specification being incubated in a Community Group

Status in Chromium


Enabled by default (tracking bug)

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • No signal
  • No signal
  • Positive


Last updated on 2021-05-05