explain why: pressing the "Waveform" button can display the waveform diagram of the audio signal, which is very important for the DJ. Waveforms can help them to observe the amplitude and frequency changes of audio signals accurately, so as to better grasp the rhythm and audio characteristics of songs.
expanded content: waveform display plays a vital role in DJ's work. By observing the waveform diagram, DJ can accurately locate, mix and transition the audio. They can judge the rhythm and structure of the song according to the shape and change of the waveform, so as to make better mixing decisions. In addition, waveform display can also help DJ find possible problems, such as audio clipping or distortion, so as to adjust and repair in time. Therefore, skillfully using the waveform display function is one of the very important skills for DJ.