Piano tuning is known to be difficult because the stiffness of piano strings causes the tones produced to be inharmonic.

Recording of Schubert Impromptu Op. 90 No. 2 at Theme Kawai showroom, Bangalore.

Update: Code added on github. Click here to view. Using signal processing techniques to create an application to generate a real time pointer of the note (wrt Hindustani classical nomenclature) a person is singing, and a similar identification for a recorded song.

To check out the Music Society of BITS Goa: https://www.youtube.com/c/MuSocBITSGoa

To check out the Synchronoise acapella group of BITS Goa: https://www.