Equipment information

ARP Instruments Inc. Avatar 2221 Synthesizer
Manufacturer:
Model:
Avatar 2221
Date:
1978
Category:
Group:
Description:

Information

The AVATAR is divided into two sections: Synthesizer and Pitch Extractor/CV Generator. The Synthesizer section is like the ARP Odyssey (in fact, the AVATAR and Odyssey use several of the same printed circuit boards). It consists of two voltage controlled oscillators, a voltage controlled filter, a voltage controlled amplifier, two envelope generators (ADSR and AR), a low frequency oscillator, and a sample and hold circuit. As with standard Keyboard synthesizers, the Synthesizer requires a 1 V/ Octave control voltage, gate and trigger to be played. The Pitch Extractor/CV Generator translates the Guitar string signals into the language of synthesizers: 1 V/Octave control voltage, gate and trigger. Using the ARP Six Channel (Hex) pickup, the string signals are multiplexed to one output (last note played) and then transformed to a control voltage. Since the Synthesizer is monophonic (single note), only one string can be extracted and converted to a control voltage at a time.

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Service Manual
Manual Type:
Service Manual
Pages:
50
Size:
35.42 Mbytes (37144241 Bytes)
Language:
english
Revision:
Manual-ID:
90024
Date:
01 January 1978
Quality:
Scanned document, all readable.
Upload date:
16 October 2017
MD5:
7c2e78419b8a13196cd8b35cb8e44686
Downloads:
760

Information

SECTION 1 General Information ... 1 SECTION 2 Theory of Operation ... 4 SECTION 3 Circuit Descriptions ... 7 SECTION 4 Test Points ... 15 SECTION 5 Trim Procedures ... 22 SECTION 6 Schematics & Assemblies ... 26 SECTION 7 Parts List ... 44

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