ohjausjännitteet

Ohjausjännitteet are control voltages used in electronic circuits, particularly in modular synthesizers and some audio equipment. They are analog DC or low-frequency AC signals that represent a parameter's value, such as pitch, amplitude, or filter cutoff. Instead of a direct audio signal, ohjausjännitteet act as instructions to other modules.

The concept of ohjausjännitteet is central to subtractive synthesis. For example, a keyboard might generate a control voltage that corresponds to the selected note. This voltage is then sent to an oscillator module, which adjusts its frequency accordingly. Similarly, an envelope generator can produce a control voltage that changes over time, controlling the amplitude of an amplifier or the cutoff frequency of a filter.

The range and polarity of ohjausjännitteet can vary between different systems, but common standards exist. For instance, a common pitch control voltage standard is 1 Volt per octave (1V/Oct), meaning that for every one-volt increase in control voltage, the oscillator's pitch rises by one octave. Other standards might use different voltage ranges or scaling.

Ohjausjännitteet allow for complex and dynamic sound design by enabling modules to interact and influence each other's parameters in real-time. This modularity and interconnectedness are what give modular synthesizers their flexibility and creative potential. They are not intended to be heard directly as sound but rather to shape and control the audio signals produced by other parts of the circuit.