|The Estradin-230 is a 3 oscillator monophonic analog synthesizer produced in the USSR from the early 1980's until 1985 by Elektroizmeritel military factory in Zhitomir. The Estradin-230 was the forerunner to the Altair-231 which shares the same architecture and functionality. The Estradin factory changed the instrument`s casing and renamed it Altair-231.
The instruments offers a 49 key keyboard with velocity sensitivity. The structure of the synthesizer is 3 oscillators with oscillator 3 as a modulator, a white and pink noise generator and external audio input as additional sources. It features a 24db/oct lowpass voltage controlled filter and voltage controlled amplifier. 3 LFO generators, glide and a pitch wheel. The Estradin-230 was the Russian answer to the Minimoog.
|LFO||3 Noise, Saw Down, Sine, Square, Triangle|
|Engine Detailed||3 VCO, Pink Noise, Pulse, Saw Up, Sine, Square, Triangle, White Noise|
|Filter (VCF)||1 24dB Slope (4-pole), Low Pass, Resonance|
|Envelope (VCA)||2 ADS|
Produced:||1981 - 1983
||Y: Yes, N: No, N/A: Not Applicable
||Voltage Controlled Oscillator
||Digital Controlled Oscillator
||Low Frequency Oscillator
||Voltage Controlled Filter
||Voltage Controlled Amplifier
||As with a piano, the harder you hit a key, the louder the sound, unlike most organs which always produce the same loudness no matter how hard you hit a key.
||Pressing a key after you activated it. Channel Aftertouch, no matter which key, it will send a Channel message. Poly Aftertouch, sends the pressure per key instead of the whole channel.
|Values for OSC, LFO, Filter, Envelope are per voice unless stated otherwise.