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General| Polyphony | 24 voices |
|---|---|
| MIDI | Yes |
| Display | LCD |
| Multitimbral | 16 parts |
| ROM | 6 MB |
| LFOs | 2 per voice |
| Weight | 5.5 kg |
| Year Released | 1993 |
| Type | Digital Synthesizer |
| Effects | Chorus, Reverb, Delay |
| Expansion | 2 x SR-JV80 series expansion boards |
| Filter | Low Pass, High Pass, Band Pass |
| Outputs | Stereo L/R |
| Memory | 64 performances |
| Dimensions | 482 x 88 x 278 mm |
Step-by-step guide on connecting audio, MIDI, and power cables for the JD-990.
Procedure for safely powering on the JD-990 and connected audio equipment.
Setting up MIDI transmit and receive channels for external controller communication.
Details on using TONE SWITCH and TONE SELECT buttons to manage and select tones for editing.
Procedure for choosing and changing the basic sound waveform for a selected tone.
Adjusting the pitch of a sound using parameters like Pitch Coarse and Fine.
Modifying the tone color or quality using Filter Mode, Cutoff Frequency, and Resonance.
Adjusting the sound's volume and pan using TVA parameters and envelopes.
Utilizing the Edit Palette to view and edit parameters simultaneously across multiple Tones.
Steps to enter Rhythm Set mode and choose from internal or preset sets.
Process for adjusting level, pan, MIDI channel, and effects for each part within a Performance.
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