Abstract: A digital audio pass-through device capable of connecting multiple host computing devices is described. The digital audio pass-through device allows computing devices such as personal computers (Mac or PC), tablets, and smart phones to share high quality digital audio data streams with one another via USB connections. The digital audio pass-through device also allows for the aggregation of high quality audio data from multiple computing devices with limited to no latency.

Abstract: A router for a plurality of MIDI transmitters and receivers routes MIDI event data to and from designated ports without a host computer system connected to the router. Since a host computer system is not used, delay times are significantly reduced and many MIDI devices could be coupled to the router without significantly impacting the transmission speeds of the MIDI data. While the router works without a host connected to the router, the router could still function while a host computer is connected, which is useful when a host computer is used to send MIDI event data or record MIDI event data.

Abstract: A cable for establishing electronic communication between a first device and a second device is described. One end of the cable comprises a standard USB device connector that has four electrical contacts; two for power (VBUS, GND) and two for differential data signals (D+ and D?). The other end of the cable comprises a proprietary device connector having at least four corresponding electrical contacts and at least one additional electrical contact. The cable also has inline circuitry configured to control the power direction between the ends of the cable based on a characteristic of a signal originating from an electrical contact of the USB device connector. The devices and methods described herein enables reverse direction power across a standard 4 wire USB device receptacle in a non standard way while autonomously providing standard USB data connectivity.

Abstract: A digital audio pass-through device capable of connecting multiple host computing devices is described. The digital audio pass-through device allows computing devices such as personal computers (Mac or PC), tablets, and smart phones to share high quality digital audio data streams with one another via USB connections. The digital audio pass-through device also allows for the aggregation of high quality audio data from multiple computing devices with limited to no latency.

Abstract: A router for a plurality of MIDI transmitters and receivers routes MIDI event data to and from designated ports without a host computer system connected to the router. Since a host computer system is not used, delay times are significantly reduced and many MIDI devices could be coupled to the router without significantly impacting the transmission speeds of the MIDI data. While the router works without a host connected to the router, the router could still function while a host computer is connected, which is useful when a host computer is used to send MIDI event data or record MIDI event data.