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+import { asyncScheduler } from '../scheduler/async';
+import { audit } from './audit';
+import { timer } from '../observable/timer';
+import { MonoTypeOperatorFunction, SchedulerLike } from '../types';
+
+/**
+ * Ignores source values for `duration` milliseconds, then emits the most recent
+ * value from the source Observable, then repeats this process.
+ *
+ * <span class="informal">When it sees a source value, it ignores that plus
+ * the next ones for `duration` milliseconds, and then it emits the most recent
+ * value from the source.</span>
+ *
+ * ![](auditTime.png)
+ *
+ * `auditTime` is similar to `throttleTime`, but emits the last value from the
+ * silenced time window, instead of the first value. `auditTime` emits the most
+ * recent value from the source Observable on the output Observable as soon as
+ * its internal timer becomes disabled, and ignores source values while the
+ * timer is enabled. Initially, the timer is disabled. As soon as the first
+ * source value arrives, the timer is enabled. After `duration` milliseconds (or
+ * the time unit determined internally by the optional `scheduler`) has passed,
+ * the timer is disabled, then the most recent source value is emitted on the
+ * output Observable, and this process repeats for the next source value.
+ * Optionally takes a {@link SchedulerLike} for managing timers.
+ *
+ * ## Example
+ *
+ * Emit clicks at a rate of at most one click per second
+ *
+ * ```ts
+ * import { fromEvent, auditTime } from 'rxjs';
+ *
+ * const clicks = fromEvent(document, 'click');
+ * const result = clicks.pipe(auditTime(1000));
+ * result.subscribe(x => console.log(x));
+ * ```
+ *
+ * @see {@link audit}
+ * @see {@link debounceTime}
+ * @see {@link delay}
+ * @see {@link sampleTime}
+ * @see {@link throttleTime}
+ *
+ * @param duration Time to wait before emitting the most recent source value,
+ * measured in milliseconds or the time unit determined internally by the
+ * optional `scheduler`.
+ * @param scheduler The {@link SchedulerLike} to use for managing the timers
+ * that handle the rate-limiting behavior.
+ * @return A function that returns an Observable that performs rate-limiting of
+ * emissions from the source Observable.
+ */
+export function auditTime<T>(duration: number, scheduler: SchedulerLike = asyncScheduler): MonoTypeOperatorFunction<T> {
+  return audit(() => timer(duration, scheduler));
+}