ARP Instruments Inc. Pro DGX 2720 Synthesizer
Manufacturer:
Model:
Pro DGX 2720
Date:
1977
Category:
Group:
Description:

Information

The Pro Soloist is a hybrid of digital and analog circuits. The internal flow of the audio signals is, in most respects, quite similar to any of our other synthesizers. That is, a raw signal (pulse or sawtooth wave) is processed through a voltage controlled filter and a voltage controlled Amplifier to the output of the instrument. Two envelope generators (ADSR and AR) are available to control the VCF and VCA to determine the attack and decay characteristics of the instrument. In addition to the voltage controlled filter, there are fixed band pass filters which shape the raw waveforms for particular voices. In variable synthesizers, such as the ARP Odyssey or the ARP 2600, the signal paths, oscillator waveforms and filter characteristics are adjusted manually, In the Pro Soloist, each of these settings are programmed by a digital memory. (Read Only Memory, or R.O.M.).

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Service Manual
Manual type:
Service Manual
Pages:
64
Size:
18.87 Mbytes (19788251 Bytes)
Language:
english
Revision:
3rd Printing
Manual ID:
9001801
Date:
1977 03 01
Quality:
Scanned document, all readable.
Upload date:
2017 10 18
MD5:
5843f443c95277a327f918f5d6b4772a
Downloads:
959

Information

1. Introduction ... 2 2. Theory of Operation ... 2 3. General Information ... 3 4. Trouble Shooting Procedure ... 3 5. Tuning and Calibrations ... 4 6. Circuit Descriptions ... 5 7. R.O.M. Truth Tables ... 8 8. Voice Flow Charts ... 10 9. Interconnection Diagram ... 40 10. Block Diagrams, Board A, C & E ... 41-43 11. Schematics & Layouts, Boards A, B, C, D, E, F, & G ... 44-61 12. Parts List ... ' ... 62

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