Abstract: A method for determining a connection order of nodes on a powered audio bus by having the nodes draw power from the powered audio bus, measure the power consumed downstream, determine who is the last node on the bus, and transmit an identifier of the last node to the bus driver.

Abstract: A dual loudness meter is disclosed, simultaneously displaying the current loudness of an audio signal and of a processed audio signal, and also displaying the previous loudness of both audio signals.

Abstract: Loudness signal processors and methods for processing an input audio signal in order to control a resulting integrated loudness level and a resulting loudness range of an output audio signal by a predetermined target loudness level and by a predetermined target loudness range, the processors and methods comprising level detection and level distribution analysis; transfer function generation based on the level distribution, the predetermined target loudness level and the predetermined target loudness range; and calculation of a gain to apply to said input audio signal, resulting in said output audio signal.

Abstract: A loudness limiting method for attenuating an input audio signal in order to constrain a resulting loudness level of an output audio signal by a pre-determined threshold loudness level, the method involving determining a time-varying loudness level of the input audio signal by means of a finite-length sliding window, calculating a time-varying attenuation gain in accordance with a pre-determined threshold loudness level, time-delaying the input audio signal, and applying the time-varying attenuation gain to the time-delayed input audio signal resulting in the output audio signal. A loudness signal processor carries out the loudness limiting method and a computer program product enables a computer to carry out the loudness limiting method.

Abstract: A power amplifier system is disclosed, the power amplifier system comprising two power supplies, four amplifier half-bridges arranged as two amplifier full bridges, and an audio processor for establishing control signals for the amplifier full-bridges, where the audio processor and one of the power supplies share a common ground potential, whereas the other power supply has a floating ground; wherein both the amplifier with common ground and the amplifier with floating ground have an amplifier interconnection output and an amplifier output, and wherein the amplifier interconnection outputs are connected, and a load is connected to the amplifier outputs. Further are disclosed amplification methods and PA systems correspondingly.

Abstract: A synthetic guitar includes a body, a neck extending from the body, and at least one touch sensor at the neck for indicating finger position of a user. The body has a receptacle for removably securing a tablet computer to the body. The tablet computer has a touch screen for indicating finger position of the user. A processor of the tablet computer is programmed to receive input signals from the touch sensor and the touch screen and to produce an output signal based at least partially on the input signals. The software can enable the synthetic guitar to be used as a music synthesizer or to be used as a video game controller. Synthetic guitar can also include a retainer for removably securing a portable media player to be used as an additional video display while playing the guitar.

Abstract: A synthetic guitar includes a body, a neck extending from the body, and at least one touch sensor at the neck for indicating finger position of a user. The body has a receptacle for removably securing a tablet computer to the body. The tablet computer has a touch screen for indicating finger position of the user. A processor of the tablet computer is programmed to receive input signals from the touch sensor and the touch screen and to produce an output signal based at least partially on the input signals. The software can enable the synthetic guitar to be used as a music synthesizer or to be used as a video game controller. Synthetic guitar can also include a retainer for removably securing a portable media player to be used as an additional video display while playing the guitar.

Abstract: An innovative new series of personal near-field active monitor speakers incorporating a digital wireless receiver and an industry-standard digital serial data interface that provides for wireless and wired digital audio streaming, apps for mobile devices or computers (smart phones, tablets, laptops etc.) to provide remote configuration of studio monitor modeling, i.e., emulations of popular near-field reference monitors; artist signature modeling, i.e., emulations of the favorite settings of well-known recording artists and music producers; and remote room equalization using the microphone integrated in a mobile or desktop personal computer, or an attached external microphone.

Abstract: A system and method for removing feedback noise in an audio system includes an analyzing unit, which may utilize FFT processing and Feedback signal detection, and an adaptive feedback cancellation unit for removing the feedback noise, which may include, for example, 36 MR notch filters for one channel. A method to detect feedback noise in a substantially short amount of time combines increasing signal characteristics with full scale characteristics to find the feedback signal in a limited amount of time.

Abstract: A synthetic guitar includes a body, a neck extending from the body, and at least one touch sensor at the neck for indicating finger position of a user. The body has a receptacle for removably securing a tablet computer to the body. The tablet computer has a touch screen for indicating finger position of the user. A processor of the tablet computer is programmed to receive input signals from the touch sensor and the touch screen and to produce an output signal based at least partially on the input signals. The software can enable the synthetic guitar to be used as a music synthesizer or to be used as a video game controller. synthetic guitar can also include a retainer for removably securing a portable media player to be used as an additional video display while playing the guitar.

Abstract: An apparatus for providing a power output proportional to a source signal, including a phase modulator driving an upper and an lower power driver with carrier waveforms having a relative phase difference and having a signal modulated thereon, and coupled to a resonator circuit to operate as a substantially zero-voltage zero-current switching element, with the output fed into respective upper and lower transformers. Identical symmetrical secondary circuits on the transformers have a rectifier stage electrically connected to an inductor in series with an upper capacitor to form an upper low pass filter, and a high speed semiconductor switch coupled to a node between the inductor and rectifier stage provides a return path to ground. The lower secondary circuit inductor is highly coupled (>=0.99) to the upper inductor, and an output formed across the upper and lower output elements is isolated from rail voltage and balanced with bi-directional current.