adding new sample program: play a sinewave through the speaker
adding new sample program: play a sinewave through the speaker

walterbender/turtleconfusion,walterbender/AmazonasTortuga,AlanJAS/turtleart,walterbender/turtleartmini,walterbender/turtle3D,walterbender/turtleflags,walterbender/turtleart