These singers are laying down five tracks of live, high quality vocals for later mixing and effects -- no cables, no high-bandwidth wireless links, no eight-track recorder, just five patented microphones.              Each microphone records its performer, while exchanging synchronizing tags with the others. Later, the recordings are downloaded to a computer for addition of effects and mixing, much like existing multi-track recording software. This is enabled by the synchronizing tags, which allow the software to align and segment the tracks in time.        As shown in the patent application figure below, direct-input units allow musical instruments to join the virtual multi-track recording. Since the microphones and instruments don't share a physical recording device or limited RF bandwidth, the number of virtual channels (i.e., number of tracks) is unlimited.