A method of determining model parameters for use by a first dynamic range control, DRC, model, the method comprising: feeding (S1010, S1110) a first audio signal, being an input audio signal, to a second DRC model and receiving a second audio signal from the second DRC model, the second audio signal being a dynamic range controlled version of the first audio signal; rule-based selecting (S1020, S1120) one or more pairs of samples, each pair of samples including a sample of the first audio signal and a corresponding sample of the second audio signal; determining (S1030, S1130) parameters of a first set of parameters among the parameters for use by the first DRC model based on the one or more selected pairs of samples, wherein the first set of parameters includes linear operation parameters of the first DRC model comprising a make-up gain and a knee value, wherein the first DRC model is a soft-knee DRC model or a hard-knee DRC model and is defined by a control value that is applied to an envelope of the input audio signal; wherein the control value comprises a constant gain portion and a variable gain portion, and wherein the variable gain portion comprises a static gain function that has a first linear portion below the knee value and a second linear portion above the knee value; wherein the rule-based selecting (S1020, S1120) the one or more pairs of samples involves selecting a second pair of samples for which the value of the sample of the first audio signal in the pair has a value below a first threshold, and selecting a third pair of samples for which the value of the sample of the first audio signal in the pair has a value above a second threshold; wherein the determining (S1030, S1130) the parameters of the first set of parameters involves: calculating a first slope of said first linear portion based on the second pair of samples; calculating a second slope of said second linear portion based on the third pair of samples; and determining the knee value based on the first slope and the second slope. feeding (S1010, S1110) a first audio signal, being an input audio signal, to a second DRC model and receiving a second audio signal from the second DRC model, the second audio signal being a dynamic range controlled version of the first audio signal; rule-based selecting (S1020, S1120) one or more pairs of samples, each pair of samples including a sample of the first audio signal and a corresponding sample of the second audio signal; determining (S1030, S1130) parameters of a first set of parameters among the parameters for use by the first DRC model based on the one or more selected pairs of samples, wherein the first set of parameters includes linear operation parameters of the first DRC model comprising a make-up gain and a knee value, wherein the first DRC model is a soft-knee DRC model or a hard-knee DRC model and is defined by a control value that is applied to an envelope of the input audio signal; wherein the control value comprises a constant gain portion and a variable gain portion, and wherein the variable gain portion comprises a static gain function that has a first linear portion below the knee value and a second linear portion above the knee value; wherein the rule-based selecting (S1020, S1120) the one or more pairs of samples involves selecting a second pair of samples for which the value of the sample of the first audio signal in the pair has a value below a first threshold, and selecting a third pair of samples for which the value of the sample of the first audio signal in the pair has a value above a second threshold; wherein the determining (S1030, S1130) the parameters of the first set of parameters involves: calculating a first slope of said first linear portion based on the second pair of samples; calculating a second slope of said second linear portion based on the third pair of samples; and determining the knee value based on the first slope and the second slope. calculating a first slope of said first linear portion based on the second pair of samples; calculating a second slope of said second linear portion based on the third pair of samples; and determining the knee value based on the first slope and the second slope.