Speech recognition is popular in online gaming.
This is a list of instruments by Hornbostel-Sachs number , covering those instruments that are classified under 322.212.1 under that system .. These instruments are chromatic frame harps with strings in one plane .. These instruments may be classified with a suffix , based on how the strings are caused to vibrate .. 4  : Hammers or beaters. 5  : Bare hands and fingers. 6  : Plectrum. Plectrum. Plectrum. 7  : Bowing. 71  : Using a bow. bow. bow ( music ). 72  : Using a wheel. 73  : Using a ribbon. 8  : Keyboard. Keyboard. Musical keyboard. 9  : Using a mechanical drive