Systems and methods for adjusting bass levels of a multi-channel audio signal include, among other features, (i) receiving the multi-channel signal via a playback device; (ii) separating, from the multi-channel signal, low-frequency signals comprising frequencies less than a threshold frequency; (iii) determining electrical energies of the low-frequency signals; (iv) determining a first energy by summing the electrical energies of the low-frequency signals; (v) consolidating the low-frequency signals into a consolidated low-frequency signal; (vi) determining a second energy by determining an electrical energy of the consolidated low-frequency signal; (vii) generating a gain-adjusted low-frequency signal by adjusting a gain of the consolidated low-frequency signal based on both (a) the first energy and (b) the second energy; (viii) generating a gain-adjusted multi-channel signal by mixing the gain-adjusted low-frequency signal back into the multi-channel signal; and (ix) using the gain-adjusted multi-channel signal to play back gain-adjusted multi-channel audio content via the playback device.

Enclosed are embodiments for immersive audio fading. In some embodiments, a method comprises: receiving object-based audio and metadata; rendering the object-based audio into a multichannel audio presentation for a first loudspeaker layout based on the metadata determining a first mix based on the multichannel audio presentation and a second loudspeaker layout associated with the vehicle; generating first loudspeaker signals based on the first mix for playback through loudspeakers in the second loudspeaker layout; receiving input; determining a second mix different from the first mix based on the multichannel audio presentation and the input; and generating second loudspeaker signals based on the second mix for play back through the loudspeakers in the second loudspeaker layout.

The present invention relates to methods for generating a conversion filter (KF) for converting a multidimensional original audio signal (AA) into a two-dimensional listening audio signal (HA), comprising the following steps: 1. Transformation of a time-based original audio signal (PAA) into a frequency-based original audio signal (FAA) 2. Sequential optimization of a basis conversion matrix (BKM) for converting the frequency-based original audio signal (FAA) into a frequency-based listening audio signal (FHA) using a first optimization algorithm (KA1), preferably starting from low frequencies and ascending at least up to a switching frequency (UF) 3. Sequential optimization of the basis conversion matrix (BKM) for converting the frequency-based original audio signal (FAA) into a frequency-based listening audio signal (FHA) using a second optimization algorithm (KA2), preferably starting from the switching frequency (UF) and ascending to high frequencies 4. Storing the optimized basis conversion matrix (BKM) of the correlation between the frequency-based original audio signal (FAA) and the frequency-based listening audio signal (FHA) in a frequency-based conversion matrix (FKM) 5. Transforming the frequency-based conversion matrix (FKM) into a time-based conversion matrix (PKM) as a conversion filter (KF).