According to some aspects, a method for improving understandability of audio corresponding to dictation to assist a transcriptionist in transcribing the dictation is provided. The method comprises presenting a user interface to the transcriptionist, the user interface including at least one control that can be selectively set to one of a plurality of settings, receiving a selection of one of the plurality of settings via the at least one control, and compressing a dynamic range of at least a portion of the audio using at least one parameter value associated with the selected setting.