Altair Estradin - 231
Monophonic synthesizer Altaiir 231 (Estradin factory, Zhitomir city) is intended
to play different sounds from the imitation of natural instruments to complicated
synthesized electronic timbres, sound effects, percussion sounds & so on. There are a
four-octave keyboard & a wheel to pitch control.
There are also controls for parameters on the front panel, an output for
phones, an input for a pedal.
The instrument consists of four main blocks of sound synthesis - Generator,
Mixer, Filter and Contour.
Synthesis is based on 3 master oscillators (each of them with different
parameters of registers) waveform, frequency modulation.
There is also a generator of white & pink noise. Low-pass filter
with main parameters gives the possibility for keyboard tracking.
Portamento adjustment knob is provided.
To tune a pitch the tone signal is used (440Hz)
It provides a linear input to connct an external sound source to Altair.
Output and input sockets are 1/4" jacks
Altair - 231 | Manual | Schemes