+ // every 100 ms or so (we get updates every 5–20 ms). Note that this
+ // means that the digital peak meters are ever so slightly too low
+ // (each update won't be a faithful representation of the highest peak
+ // since the previous update, since there are frames we won't draw),
+ // but the _peak_ of the peak meters will be correct (it's tracked in
+ // AudioMixer, not here), and that's much more important.