COSTRUIRE THEREMIN PDF

Per fare un theremin programmabile e polifonico che suoni davvero bene, non basta un Arduino, ci vuole tutta la potenza hardware e software di un vero PC. Cercando di semplificare al massimo: Arduino fa tutto in firmware e va bene per le applicazioni stand-alone, Theremino invece basa le sue applicazioni su software ad alto livello che deve essere eseguito su un PC. Se le due antenne lavorano sulla stessa frequenza possono interferire tra loro e provocare interferenze sulla nota quando si muove la mano sinistra. Fare un doppio click con il tasto sinistro sulla linea del primo CapSensor prima freccia a sinistra. Infine controllare che le due frequenze, indicate dalle frecce arancioni a destra, siano diverse diciamo di almeno kHz Per risolvere il problema delle interferenze, aggiungere un condensatore da 10 pF in serie al filo della antenna del volume.

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The pitch of a theremin is controlled by creating a circuit between a variable oscillator and a reference oscillator, which should be available at specialty electronics stores as individual units.

Each should be tuned to the same frequency, ideally in the middle of the low frequency radio range. The pitch-reference oscillator should work around kHz, used in conjunction with a 10k potentiometer. The signal this oscillator creates should be fed into the mixer with screened cable. The pitch-variable oscillator should also work around khz, and will be affected by the stray capacitance of the reference unit.

Potentiometers need to be wired into the circuit to make the relationship of your hand movement to the change in pitch more linear. When playing the theremin, your hand changes the capacitance of the antenna, which will change the frequency of the variable oscillator. This should also be in the low frequency radio range and carefully tuned, operating somewhere in the neighborhood of kHz.

This signal will be influenced directly by the volume antenna, manipulating it by hand. A 10k trim potentiometer needs to be installed to enable the operator to tune the theremin appropriately. Send the output of this variable oscillator into a volume resonant circuit. The output will be a DC voltage that varies according to the output of the variable oscillator. In other words, the closer the hand to the antenna, the quieter the sound.

The purpose of the mixer is to compare the frequency of the variable oscillator with the reference frequency. The output will be an audio signal between 20Hz and 20kHz. Assembling the mixer is the simplest step in the process. Fed with two slightly different frequencies from the oscillators, the mixer will produce an output with a complex waveform, giving it the distinctive warble we associate with the sci-fi sound of the theremin.

The output actually contains two distinct frequencies, which require the need of a low pass filter, that is two 0. Route the outputs of the mixer and the volume resonant circuit into a voltage-controlled amplifier.

The voltage from the volume resonant circuit changes the amplitude of the audio signal from the mixer, helping to boost the sound and control the volume of the instrument.

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Cómo construir un theremin

Es una caja con dos antenas, una de las cuales controla el tono del instrumento y la otra el volumen. Oscilador para control de tono. Oscilador para control de volumen. Circuito de resonancia para amplificador controlado por volumen y voltaje. Si, en cambio, quieres construir uno completamente con tus manos, entonces hay muchas cosas que debes saber. Primero, debe poder leer un diagrama de cableado simple. Encuentra o construye una caja lo suficientemente grande como para contener todos los circuitos internos.

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Simple theremin 555 timer

Purtroppo gran parte dei VST, anche quelli studiati per il Theremin, sono stati sviluppati sui segnali che non erano veri segnali Theremin. Speriamo che presto si accorgano che finalmente esiste il nostro segnale Theremin-MIDI e che amplino i loro PitchBend, almeno fino alle classiche 4 o 5 ottave del Theremin. Non sarebbe male scrivere agli sviluppatori. In questo caso era la scheda Realtek. Tenerle ambedue abbastanza basse e sperimentare.

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