Just when a pitch raise or lowering is necessary depends upon how accurate the final tuning must be, and the size and quality of the piano. Any net change in a piano’s string tension during tuning will distort the final result and reduce stability.
Realistically, a pitch difference of a few percent can usually be accommodated successfully during tuning. For average situations, when a piano’s pitch is noticeably different from that of other standard pitched instruments, a pitch correction procedure is necessary before tuning.
Whenever exact pitch level is critical, such as in concert or recording instruments, any pitch deviation must be corrected before tuning.
You should Schedule a Tuning Today so that we can determine exactly what is needed.