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29 Δεκ 2004 · The theremin is played by carefully moving your hands near 2 antennas, one for volume and one for pitch. But how does it work? If you mix the signals of 2 rf oscillators, you will get many output signals. The most important signals are the sum and difference of both frequencies.
- Of The Theremin Making
What follows is a collection of specifications, images and...
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- Of The Theremin Making
The Theremin has two very high frequency oscillators (around 350 kHz). One of them is fixed, and the other is varied by the capacitance of your hand: it's the difference between the two frequencies which decides the pitch.
The theremin's sound is produced by the electronic principle of 'heterodyning' - when the frequency of the 'pitch' oscillator is subtracted from the frequency of a fixed oscillator, the resultant frequency produced falls within the range of human hearing, and this is what we hear through a speaker as sound.
Specifically, we leverage the fact that in the frequency ranges from 100 kHz to 40 MHz the electric field around the body behaves as a quasi-static near-field [36,3].
20 Οκτ 2006 · What follows is a collection of specifications, images and mechanical details of the instruments. Instrument specifications. Musical range: 5 1/2 octaves – 3 octaves above middle C. Controls: Pitch tuning, volume tuning,waveform, high tones cutoff, mute switch, power switch, power on led. Outputs.
The theremin, patented in 1928 by L`eon Theremin, is a musical instrument played without any contact from the musician. The theremin uses the heterodyne technique to generate an audio signal. Two oscillators, one connected to an antenna, operate at nominally the same frequency.
Calibrating the Frequency Signal The frequency range for the Theremin should be at least two octaves (220 to 880 Hz). A second LabVIEW subVI called Scale Frequency.vi, as shown in Fig. 5, converts the second photometer signal level into a frequency level. The photometer input (0 to 6 V) is converted into an audio
