How did the waveforms on the oscilloscope in the video change when different pitches were played?

In the video, the waveforms on the oscilloscope exhibited distinct patterns corresponding to different pitches played. Higher pitches produced closer together waves with steeper peaks and valleys, indicating a higher frequency. Conversely, lower pitches resulted in more widely spaced waves with gentler slopes, reflecting a lower frequency. The visual differences in the waveforms highlighted the relationship between sound frequency and waveform characteristics.