third harmonic of the fifth, leaking holes 0 and 2. On some Baroque recorders, the 17th can be produced as the third harmonic of the sixth, leaking hole 0 as well as hole 1, 2 or both. Technique Although the design of the recorder has changed over its 700-year history, notably in fingering and bore profile (see History), the technique of playing recorders of different sizes and periods is much the same. Indeed, much of what is known about the technique of playing the recorder is derived from historical treatises and manuals dating from the sixteenth to eighteenth centuries. The following describes the commonalities of recorder technique across all time periods. Playing position In normal playing position, the recorder is held with both hands, covering the fingerholes or depressing the keys with the pads of the fingers: four fingers on the lower hand, and the index, middle and ring fingers and thumb on the upper hand. In standard modern practice, the right hand is the lower hand, while the left hand is the upper hand, although this was not standardised before the modern revival of the recorder. The recorder is supported by the lips, which loosely seal around the beak of the instrument, the thumb of the lower hand, and, depending on the note fingered, by the other fingers and the upper thumb. A practice documented in many historical fingering charts is the use of finger seven or eight to support the recorder when playing notes for which the coverage of this hole negligibly affects the sounding pitch (e.g. notes with many holes uncovered). Larger recorders may have a thumb rest, or a neck strap for extra support, and may use a bocal to direct air from the player's mouth to the windway. Recorders are typically held at an angle between vertical and horizontal, the attitude depending on the size and weight of the recorder, and personal preference. Fingers Pitches are produced on the recorder by covering the holes while blowing into the instrument. Modern terminology refers to the holes on the front of the instrument using the numbers 1 through 7, starting with the hole closest to the beak, with the thumbhole numbered hole 0. At the most basic level, the fingering technique of the recorder involves the sequential uncovering of the holes from lowest to highest (i.e., uncovering 7, then uncovering 7 and 6, then uncovering 7, 6