he note heard on a musical string instrument (e.g. a guitar, violin, etc...) is related to its fundamental frequency. A guitarist tunes their instrument by turning pegs on the bridge causing the tension in the string to increase or decrease. If a guitarist notices that a certain string is sounding "flat" (meaning it is playing a note with a lower frequency than desired), should they tighten or loosen the string? As the guitarist uses Page 7 of 8 Toronto Metropolitan University - PCS130 Distribution, sale or profit without the authorization of the owner of this material is expressly prohibited their fingers on the fret board to change notes, what variable are they changing with respect to the standing waves