Patent ID: 9008334
Filing Date: 2015-04-14
Classification: H03G,H03M

Abstract:
1. An audio mixing console comprising: a first amplifier configured to receive an analogue audio input signal, the first amplifier further configured to amplify the received analogue audio input signal with a first adjustable gain; an analogue to digital converter configured to receive the amplified analogue audio input signal, the analogue to digital converter further configured to generate a digital audio signal by an analogue to digital conversion of the analogue audio signal; a second amplifier configured to receive the digital audio signal, the second amplifier further configured to amplify the received digital audio signal with a second adjustable gain; and a gain range control unit configured to identify a signal level overload at the analogue to digital converter, reduce the first adjustable gain at the first amplifier by a first amount, and increase the second adjustable gain at the second amplifier by the first amount so that an overall gain of the first and second amplifiers is preserved, where the gain range control unit is configured to identify the signal level overload by a determination that the signal level of the digital audio signal is higher than a predefined first threshold, and that a number of consecutive audio signal samples that are above the predefined first threshold is higher than a predefined second threshold, and where the gain range control unit is further configured to interpolate a signal level evolution of the digital audio signal using a signal evolution of a predefined number of last detected signal samples, and determine an amount the digital audio signal would be higher than the predefined first threshold, the gain range control unit being further configured to reduce the first adjustable gain by the determined amount and to increase the second adjustable gain by the determined amount.