Abstract: An apparatus including at least one processor and at least one memory including computer program code. The at least one memory and the computer program code is configured to, with the at least one processor, cause the apparatus at least to perform: determining a change of state in an apparatus within a first time period, wherein a first state operates with a first audio output having a first average sound pressure level and a second state operates with a second audio output having a higher average sound pressure level; and processing the second audio output signal such that the second audio output sound pressure level is acoustically continuous with respect to the first average sound pressure level immediately following the change of state.