A method including a device of an installation performing steps to determine whether an audio stream is played back in the installation by only one piece of audio playback equipment or by a group of at least two pieces of audio playback equipment (11a, 11b); if the device detects that the audio stream is played back by a single piece of audio playback equipment, then the device generates an order for said piece of equipment to apply a given set of equalization parameters; and if the device detects that the audio stream is played back by a group of at least two pieces of audio playback equipment, then the device determines the equalization parameters to be applied by each piece of audio playback equipment of said group, and generates a respective order for each piece of audio playback equipment of said group to apply a respective given set of equalization parameters.