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Rhodes CHROMA - User Manual

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1 CHROMA
1 Programming Manual
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Summary

PROGRAMMING

COPY FROM A OR B SEQUENCE

Steps to copy parameters between programs.

COPY MODES

Explains functions for copying parameters between programs.

INTRODUCTION

SPECIFICATION CHANGE

Notes on parameter changes from earlier versions.

MANUAL NOTES

Information about the manual's preliminary status and revision.

STRUCTURE

INSIDE THE CHROMA

Overview of the Chroma's central computer and circuit boards.

SYNTHESIZER CHANNELS

Details the structure and components of synthesizer channels.

Basic Building Blocks

Outlines the core audio and control signal components.

PROGRAMMING

INTRODUCTION TO PARAMETERS

Explains the role and types of parameters in programming.

PROCESS OF PROGRAMMING

Step-by-step guide to modifying parameters and programs.

Left Panel Controls

Describes parameters accessed via the left panel controls.

Right Panel Controls

Describes parameters accessed via the right panel controls.

Parameter Value Range Types

Explains different types of parameter control ranges.

CONTROL SIGNAL SCALING

Explains how control signals are measured and scaled.

SCRATCH PATCH

Describes the parameter clearing feature for initializing settings.

CONVENTIONS AND USAGE

Provides guidelines for common programming structures and accepted usage.

PANEL PARAMETER DESCRIPTIONS

LEFT PANEL PARAMETERS

Details parameters controlled by the left panel.

LEFT PANEL SWITCH SEQUENCES

Explains sequences for accessing parameters and modes.

Switch Sequences and Functions

Describes various switch combinations for functions like EDIT, COPY, PROG SELECT.

Specific Panel Parameters

Details parameters like Main Transpose, Link Transpose, Keyboard Split.

Link Balance and Sequence Program

Explains link balance and program sequence settings.

CONTROL PARAMETERS

PATCH [1] Configuration

Defines the synthesizer channel configuration based on PATCH settings.

Patch Value Examples (2, 4, 3, 5)

Details specific PATCH configurations and their applications.

Patch Value Examples (6, 8, 7, 9)

Details specific PATCH configurations and their applications.

Patch Value Examples (10, 12, 11)

Details specific PATCH configurations and their applications.

Patch Value Examples (13, 15, 14)

Details specific PATCH configurations and their applications.

GLIDE PARAMETERS

RATE [6]

Controls the speed of pitch transitions in glide.

SHAPE [7]

Selects between portamento and glissando for glide.

SWEEP PARAMETERS

MODE [8]

Controls synchronization type for sweep generators.

RATE [9]

Sets the unmodulated sweep rate.

SWEEP RATE MOD [10]

Selects modulation source for sweep rate.

SWEEP WAVESHAPE [11]

Establishes the waveshape generated by the sweep.

ENVELOPE PARAMETERS

Envelope Amplitude and Attack Control

Sets envelope peak based on key velocity and attack time.

Envelope Decay and Release Settings

Sets decay and release time constants.

Envelope Modulation and Delay Features

Details modulation sources and delay features.

PITCH PARAMETERS

TUNE [26]

Controls the unmodulated pitch of the oscillator.

Modulation Select and Depth

Selects and adjusts modulation sources for pitch.

WAVESHAPE PARAMETERS

WAVESHAPE [33] Selection

Selects the waveshape produced by the oscillator.

Pulse Output and Sawtooth Waveforms

Details pulse output behavior and sawtooth options.

Pulse Width and Modulation Control

Adjusts pulse width and its modulation sources.

CUTOFF PARAMETERS

Filter Mode and Resonance

Selects filter mode (LP/HP) and adjusts resonance (Q).

Filter Tune and Modulation

Controls filter tuning and its modulation sources.

Filter Modulation Settings (Mod 2 & 3)

Details modulation select and depth for filters.

AMPLITUDE PARAMETERS

Amplitude Modulation 1 & 2

Selects and sets gain for amp modulation inputs.

Amplitude Modulation 3 (Fixed)

Selects fixed post-modulation for the amplifier.

HIDDEN FUNCTIONS

[SET SPLIT] Function Categories

Overview of SET SPLIT functions: setups, subroutines, diagnostics, aids.

Cassette and Interface Operations

Controls cassette operations and interface commands.

Envelope Parameter Adjustment via SET SPLIT

Uses SET SPLIT for envelope parameter thresholds and rates.

Sample Program

Creating a Brass Chorus Sound

Step-by-step example for creating a specific sound.

CASSETTE

Interface Notes

Important notes on cassette operations and controls.

Cassette Operations (Load;Save)

Explains functions for loading and saving programs.

GLOSSARY

Core Architecture Terms

Defines BOARD, CHANNEL, CURRENT PROGRAM, EDIT MODE, ENVELOPE.

Instrument and Linking Terms

Defines GLIDE, GLISSANDO, INSTRUMENT, KEYBOARD SPLIT, LINKING, MODIFIED FLAG.

GLOSSARY

Panel and Parameter Definitions

Defines PANEL MODE, PANEL PARAMETER, PARAMETER, PATTERN, PORTAMENTO.

GLOSSARY

Program and Sweep Concepts

Defines PROGRAM, SWEEP, TEMP MODE, VOICE.

Rhodes CHROMA Specifications

General IconGeneral
Polyphony16 voices
Oscillators2 per voice
TypeAnalog
Year Released1982
Filter24 dB/octave resonant low-pass
LFO1
Envelopes2 ADSR
Keyboard61 keys

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