What is a pitch raise and do I need one?
Tuning on the 1st St. Bridge for Austin's Play Me I'm Yours
If your piano has not been tuned in a while, it will most likely require a pitch raise.
A piano has about 230 strings, and when they are all significantly stretched (or slackened) during the tuning process, the change in tension to the piano's structure will send it immediately back out of tune.
Therefore, a very out of tune piano will first need to be rough tuned to standard pitch before it can be fine tuned. Both tunings can be done in one visit.
Having your piano tuned every 6 months will eliminate the need for a pitch raise and increase your piano's ability to stay in tune.