Altering sound output on a virtual music keyboard

In a musical instrument keyboard of a touch-sensitive electronic display, the improvement comprising:

• a module for pitch alteration of a note being played on said keyboard in response to a key of said keyboard on said touch-sensitive display being touched by a user, said module continuously altering the pitch of said played note as said user slides a point of contact on said touch-sensitive display horizontally from said key being played across adjacent keys to a second key, in accordance with the keys being contacted during said sliding of said point of contact.

A computer program product comprising a plurality of computer executable instructions stored on a non-transitory computer readable storage medium, said instructions causing a computer to:

• play a note of a key of said keyboard on said touch-sensitive display touched by a user;
• and
• continuously alter the pitch of said played note as said user slides a point of contact on said touch-sensitive display horizontally from said key being played across adjacent keys to a second key, in accordance with the keys being contacted during said sliding of said point of contact.