A number of shots fired at a given range at one target & with one sight setting, with either rifle or handgun, to determine the accuracy of either the gun or the ammunition. With a handgun the most common range is probably 25 yards. A two inch group is generally considered good.
Stevie Wonder plays a Hohner Chromatic Harmonica. He mostly plays the Super 64x chromatic which i recentally bought and it is amazing. The quality of sound of smoothness is incredible. I would recommend it to anyone playing the harmonica.
Tremolo harmonica. Tremolo harmonicas are a type of harmonica, distinct by having two reeds per note. In a tremolo harmonica the two reeds are tuned slightly off a reference pitch, one slightly sharp and the other slightly flat. This gives a unique wavering or warbling sound created by the two reeds being not exactly in tune with each other and difference in their subsequent waveforms acting against one another.