A mixing signal processing technique modifies digital audio recordings to simulate the linear and nonlinear effects of propagation and mixing of sounds in air. When multiple sounds or complex sounds comprised of multiple frequencies in the audible spectrum propagate in such a nonlinear medium, they transfer energy into sound at new frequencies given by the sums and differences of the original signal frequencies. The mixing signal processing technique may improve the ability of a system to reproduce the effects of a live performance using a digital audio recording.

A mixing signal processing technique modifies digital audio recordings to simulate the linear and nonlinear effects of propagation and mixing of sounds in air. When multiple sounds or complex sounds comprised of multiple frequencies in the audible spectrum propagate in such a nonlinear medium, they transfer energy into sound at new frequencies given by the sums and differences of the original signal frequencies. The mixing signal processing technique may improve the ability of a system to reproduce the effects of a live performance using a digital audio recording.

An audio reverberation method includes: preprocessing an input audio signal to obtain a reverberation input signal; reverbing the reverberation input signal to generate an initial reverberation audio signal of a target scene; performing audio content analysis on the input audio signal to obtain an audio content feature of the input audio signal; determining a content-adaptive masking matrix based on the audio content feature; performing weighted mixing on the content-adaptive masking matrix and the initial reverberation audio signal to obtain a content-adaptive reverberation signal; and performing weighted mixing on the content-adaptive reverberation signal and the reverberation input signal according to a preset ratio to obtain a final reverberation audio signal. According to the embodiments of the present disclosure, audio signals with different audio content are adapted to different reverberation effects, avoiding the problem of distortion of the final reverberation audio signal.

A method of controlling sound signals for mixing a backing sound and a guitar sound. The method includes configuring a user terminal to: receive a first input instruction selected from a plurality of available input instructions, where the plurality of available input instructions include a first instruction to transmit a signal of the backing sound; to provide the signal of the backing sound to a wireless communication device in response to the first input instruction being the first instruction to transmit the signal of the backing sound; and to control the wireless communication device to convert the signal of the backing sound to a first wireless signal and transmit the first wireless signal to a sound output device for mixing the signal of the backing sound and a signal of the guitar sound provided from the sound output device.

In various applications, the system provides a method for processing audio signals, including: receiving, by a processor, a digital audio signal from a recorded audio file; analyzing, by the processor, the digital audio signal to identify pitch distortion caused by changes in momentary sound level; determining, by the processor, an amount of compensation of the audio signal to correct the identified pitch distortion; dynamically adjusting, by the processor, the digital audio signal by the compensation amount to correct the identified pitch distortion; and outputting, by the processor, the digital audio signal to an audio transducer device of a listener to improve a listening experience for the listener of the recorded audio file.

In various applications, the system provides a method for processing audio signals, including: receiving, by a processor, a digital audio signal from a recorded audio file; analyzing, by the processor, the digital audio signal to identify pitch distortion caused by changes in momentary sound level; determining, by the processor, an amount of compensation of the audio signal to correct the identified pitch distortion; dynamically adjusting, by the processor, the digital audio signal by the compensation amount to correct the identified pitch distortion; and outputting, by the processor, the digital audio signal to an audio transducer device of a listener to improve a listening experience for the listener of the recorded audio file.