Page "Harp" Paragraph 44

Three strings on the pedal harp have no pedal tuning mechanism: the two lowest strings ( contrabass C and D ) and the highest string ( G ).

These strings are normally tuned to C, D and G natural respectively.

However, they can be manually tuned to sharp or flat through scordatura prior to performance.

This can be indicated by verbal statements at the beginning of a composition, for example, " Tune Low C to C flat ", or " If necessary, tune high G to G sharp ".