/** Pull audio up to a given time; after this call, no more data can be pushed
* before the specified time.
* @param time Time to pull up to.
* @return Blocks of merged audio up to `time'.
*/
/** Pull audio up to a given time; after this call, no more data can be pushed
* before the specified time.
* @param time Time to pull up to.
* @return Blocks of merged audio up to `time'.
*/