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Roland | JX-305


The Roland JX-305 was widely considered the keyboard version of the highly popular MC-505 Groove box. All the controls of the MC-505 were available to the player as well as 9 control knobs and a 2 line character display.The unit was aimed at the Dance and Techno genres.

The all-important sound generator is a high-performance synthesizer offering 64-note polyphony. A rich array of parameters, including sharp filters and ADSR envelopes can be modified using the knobs on the panel to create your own sounds. The sound generator can also be used as a multitimbral sound module, providing up to eight parts.

The JX-305 contains 274 high-quality preset patterns for immediate use and 494 RPS patterns. Since the patterns cover a wide range, from techno to reggae, this instrument provides everything you need for most situations. JUNO, JUPITER and TR-808/909, indispensable for the dance scene, to realistic acoustic sounds. From the day you take the JX-305 home, you can enjoy today's leading-edge sounds. You can also create your own original sounds and store them in memory for immediate recall at any time.

High-performance DSP (digital signal processing) technology provides you with a wide range of effects. Three effect units are provided: Reverb adds reverberation, Delay adds echo-like effects, and general-purpose effect unit provides 24 types of effect that have been optimized for dance music.

The JX-305 provides three key modes: single, dual, and split. It's to divide the keyboard into left and right zones, which can play different sounds simultaneously, or you can layer two sounds for every note. You can construct a song in real time as you play, sim- ply by switching the playback patterns. During recording, you can switch the recording part to record non-stop.

The JX-305's internal memory by itself can contain approximately 75,000 notes (up to 200 patterns). By using a memory card (SmartMedia), the capacity can be boosted to a maximum of approximately 480,000 notes (up to 200 patterns). You can play arpeggios simply by pressing the keyboard. Your musical imagination and taste are all you need to create completely new phrases.

You can play back phrases simply by pressing a single key. This has a wide variety of uses, such as adding accents during a song, or playing an entire song using just RPS. Play quantize changes the groove in real time The JX-305 provides three types of play quantize: Grid, Shuffle and Groove. Simply by rotating a knob, you can produce your own "groove" in real time.

The JX-305 is designed for live performance, with features such as a mute button that lets you instantly silence the playback of a specific part or rhythm instrument, and a Real-Time Transpose function that lets you transpose during pattern playback. Of course, you can also move knobs during pattern playback to modify the sound in real time.
Engine TypeDigital
EngineVA, Sample
Voices (max)64
Filter (VCF)Digital real-time & midi controllable resonant low/band pass filter
FX24 effects including reverb, delay, chorus, etc...
Memory640 patches, 28 rhythm kits
Sequencer768 Dance patterns, 256 User. Real-time Phrase Sequencer
Recording8-Track sequencer
Key typeKeys
Produced:1998 - 1998
Legend: Obvious Y: Yes, N: No, N/A: Not Applicable
VCO Voltage Controlled Oscillator DCO Digital Controlled Oscillator
LFO Low Frequency Oscillator Sub Sub Oscillator
VCF Voltage Controlled Filter VCA Voltage Controlled Amplifier
Velocity 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. Aftertouch 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.

Manuals, patches etc.


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