message: Clock callback returns seconds
diff: @@ -8,7 +8,7 @@ import { TickSignal } from "./TickSignal";
  import { TickSource } from "./TickSource";
  import { assertContextRunning } from "../util/Debug";
  -type ClockCallback = (time: Time, ticks?: Ticks) => void;
  +type ClockCallback = (time: Seconds, ticks?: Ticks) => void;
  interface ClockOptions extends ToneWithContextOptions {
  frequency: Hertz;
  