In a method of enhancing spatial audio signals, receiving (S10) an ACELP coded signal comprising a plurality of blocks. For each received block estimating (S20) a signal type based on at least one of the received signal and a set of decoder parameters, estimating (S30) a pitch frequency based on at least one of the received signal and the set of decoder parameters, and determining (S40) filtering parameters based on at least one of the estimated signal type and the estimated pitch frequency. Finally, high pass filtering (S50) the received signal based on the determined filter parameters to provide a high pass filtered output signal.