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A common way of warning that an obscured traffic light ahead is red is a red-signal-ahead sign. It is shaped like a standard yellow diamond shape sign with LEDs spelling out "Signal Ahead". Just before the traffic light goes yellow, the word "Red" will light up above Signal Ahead and they will begin to flash alternately.
This computer software package has all the features of a virtual strobe, such as user-programmable temperaments and tunings. To use this tuner, a musician must have a computer next to the instrument to be tuned. An alternative is the PC-based strobe tuner TB Strobe Tuner with fewer functions. Peterson VirtualStrobe application on iPod Touch
Organ pipes are so sensitive to temperature that the body heat of the organ tuner can affect the tuning. If one holds a small metal flue pipe briefly in one's hand and then returns it to the chest ( windchest ), its pitch (relative to a tuning reference) can be heard to change as the pipe returns to room temperature.
EM34 tuning eye EM84 tuning indicator. A magic eye tube or tuning indicator, in technical literature called an electron-ray indicator tube, [1] is a vacuum tube which gives a visual indication of the amplitude of an electronic signal, such as an audio output, radio-frequency signal strength, or other functions. [1]
While there is no exact date that the alto flute was created, large flutes have existed for several hundred years. [1] Some problems with early alto flute design included the long length of the tube, troublesome cross fingerings, inconsistent intonation, finger holes that were too wide across, and how far one’s arm had to be stretched in order to reach the finger holes, particularly in the ...
Lower members of the flute family include the G alto and C bass flutes that are used occasionally, and are pitched a perfect fourth and an octave below the concert flute, respectively. The contra-alto , contrabass , subcontrabass , double contrabass , and hyperbass flutes are other rare forms of the flute pitched up to four octaves below middle C.
Simple system flute most commonly refers to the type of flute manufactured and favored by classical European musicians during the Classical era.This type of flute is the direct precursor of, and was made obsolete within the art music world by, the introduction of the Boehm system flute.
It is pitched in C, four octaves below the concert flute (and three octaves below the bass flute, two octaves below the contrabass flute, and one octave below the double contrabass flute). It is made of PVC and wood, its tubing is over 8 metres (26 ft) in length and its lowest note is C 0 (16 Hz), below what is generally considered the range of ...