How do ethnomusicologists use extra symbols to transcribe sounds that staff notation cannot easily show?

Standard staff notation is often insufficient for documenting non-Western music because it is designed for stable, sustained pitches and proportional rhythms, whereas many musical traditions rely on delicate nuances in timbre, volume, and pitch. To capture these complexities, ethnomusicologists employ supplementary symbols to represent sounds that fall outside the traditional system.1

These additional symbols are used to denote:
* Uncertain pitch: Notes that do not align with standard Western tuning.1
* Glissandi: Indications for slides between pitches.1
* Duration nuances: Symbols for the slight lengthening of a note value, as standard proportional notation cannot easily represent fine fluctuations in time.1
* Vocal techniques: Markers for half-voiced notes or other specific performance sounds.1

Beyond these symbols, researchers may modify the staff itself by using a different number of lines or utilize mechanical methods—such as the melograph—to create precise graphs of pitch and volume over time. These tools allow for a more accurate transcription of the performer's subtle interpretations than traditional aural notation alone.1