Generating channel and object-based audio from channel-based audio

A computer-implemented method of audio processing, the method comprising:

• receiving a channel-based audio signal;
• generating one or more reference bed channels based on the channel-based audio signal;
• generating a reference audio signal based on the one or more reference bed channels;
• generating a plurality of audio objects and a plurality of bed channels based on the channel-based audio signal;
• generating a rendered audio signal based on the plurality of audio objects and the plurality of bed channels;
• generating a detection score based on a plurality of partial loudnesses of a plurality of signals, wherein the plurality of signals includes the reference audio signal, the plurality of audio objects, the plurality of bed channels, the rendered audio signal and the channel-based audio signal, wherein the detection score is indicative of an audio artifact in one or more of the plurality of audio objects and the plurality of bed channels;
• generating a plurality of mixing parameters based on the detection score;
• and
• generating a plurality of modified audio objects and a plurality of modified bed channels based on the channel-based audio signal, the plurality of audio objects, the plurality of bed channels and the plurality of mixing parameters.