Abstract: A musical performance evaluation system basically includes an audio input, a notification device and at least one processor. The audio input is configured to input a musical performance. The notification device outputs an evaluation of the musical performance received via the audio input. The at least one processor executes a musical performance evaluation program to identify errors in the musical performance based on reference data of segments of musical performances containing errors, classify the errors in the musical performance as either a conspicuous error or an inconspicuous error, and instruct the notification device to output the evaluation of the musical performance identifying a presence of conspicuous errors differently from inconspicuous errors.

Abstract: A method is provided for setting an operating parameter for a load on a photovoltaic power source, such as an AC signal or the speed of a motor, including operating a load, using a control system, with the operating parameter set at a first value, providing a measurement of DC source voltage at the power source to the control system, and providing a measurement of DC source current at the power source to the control system, determining the logarithm of the conductance from the measurement of DC source voltage and the measurement of DC source current, and comparing a reference parameter based on the logarithm of the conductance to a reference setpoint. Based on that comparison, the operating parameter may be modified for the load if the value of the reference parameter differs from the value of the reference setpoint by more than a threshold amount.