A method, comprising: in an audio headset (200; 503): receiving an audio signal carrying a plurality of audio channels; and processing the plurality of audio channels to generate stereo signals for output to a left and a right speaker (216a, 216b) of the audio headset (200; 503), wherein the processing comprises: determining a numerical value corresponding to how many audio channels are carried in the received audio signal; wherein the determining of the numerical value comprises: determining a level of audio on a left channel and a level of audio on a right channel of the received audio signal during a determined time period; determining the numerical value to be one when only one of the level of the audio on the left channel and the level of the audio on the right channel is above a first threshold during the determined time period; determining the numerical value to be at least two when the level of the audio on the left channel is above a second threshold during the determined time period and the level of the audio on the right channel is above the second threshold during the determined time period; determining the numerical value to be at least six when a level of audio on a subwoofer channel and/or on a center channel of the received audio signal is above a third threshold during the determined time period; adjusting levels of one or more of the audio channels based on the numerical value corresponding to how many audio channels are carried in the received audio signal; and combining the plurality of audio channels to generate the stereo signals. receiving an audio signal carrying a plurality of audio channels; and processing the plurality of audio channels to generate stereo signals for output to a left and a right speaker (216a, 216b) of the audio headset (200; 503), wherein the processing comprises: determining a numerical value corresponding to how many audio channels are carried in the received audio signal; wherein the determining of the numerical value comprises: determining a level of audio on a left channel and a level of audio on a right channel of the received audio signal during a determined time period; determining the numerical value to be one when only one of the level of the audio on the left channel and the level of the audio on the right channel is above a first threshold during the determined time period; determining the numerical value to be at least two when the level of the audio on the left channel is above a second threshold during the determined time period and the level of the audio on the right channel is above the second threshold during the determined time period; determining the numerical value to be at least six when a level of audio on a subwoofer channel and/or on a center channel of the received audio signal is above a third threshold during the determined time period; adjusting levels of one or more of the audio channels based on the numerical value corresponding to how many audio channels are carried in the received audio signal; and combining the plurality of audio channels to generate the stereo signals. determining a numerical value corresponding to how many audio channels are carried in the received audio signal; wherein the determining of the numerical value comprises: determining a level of audio on a left channel and a level of audio on a right channel of the received audio signal during a determined time period; determining the numerical value to be one when only one of the level of the audio on the left channel and the level of the audio on the right channel is above a first threshold during the determined time period; determining the numerical value to be at least two when the level of the audio on the left channel is above a second threshold during the determined time period and the level of the audio on the right channel is above the second threshold during the determined time period; determining the numerical value to be at least six when a level of audio on a subwoofer channel and/or on a center channel of the received audio signal is above a third threshold during the determined time period; determining a level of audio on a left channel and a level of audio on a right channel of the received audio signal during a determined time period; determining the numerical value to be one when only one of the level of the audio on the left channel and the level of the audio on the right channel is above a first threshold during the determined time period; determining the numerical value to be at least two when the level of the audio on the left channel is above a second threshold during the determined time period and the level of the audio on the right channel is above the second threshold during the determined time period; determining the numerical value to be at least six when a level of audio on a subwoofer channel and/or on a center channel of the received audio signal is above a third threshold during the determined time period; adjusting levels of one or more of the audio channels based on the numerical value corresponding to how many audio channels are carried in the received audio signal; and combining the plurality of audio channels to generate the stereo signals.