Do not use the product if there is any potential danger. Do not turn the volume too high to hear sounds around you, turn down the volume if you feel a tinnitus or the volume is too high. Do not listen at high volume levels for long periods of time to prevent hearing damage. Important safety information. Bluedio headphones hurricane turbine man….

View and Download Roland U-20 owner's manual online. RS-PCM keyboard. U-20 Electronic Keyboard pdf manual download. TECH system based on a Intel P8098 CPU which handles 30 voices polyphonic subtractive synthesis RS PCM Resynthesized Pulse Code Modulation. RS concept resynthesizes and rebuilds new harmonics using a custom sample interpolation, but it lacks a filter structure in fact RS can be mistaken with older L.A synthesis implemented in Roland D50 model. U20 SOUND STRUCTURE sound hierarchy is a bit. The U‑20, U‑220, and U‑110 Owner's Manuals are some of the worst manuals ever written. They are chaotic and extremely difficult to follow. The complicated menu architecture of the U‑20 deserves a better guide but this is all that is available online U-20 Owner's Manual (v.94-8).

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U-20
Manufacturer	Roland Corporation
Dates	1988 ~ 1991
Price	£1050 GBP^[1]
Technical specifications
Polyphony	30 voices
Timbrality	6 parts + 1 drumpart
Oscillator	4MB ROM samples^[2]
LFO	1
Synthesis type	PCMsample based
Filter	None
Attenuator	ADSR envelope
Aftertouch expression	Yes
Velocity expression	Yes
Storage memory	128 tones, 64 patches
Effects	Reverb, chorus and delay
Input/output
Keyboard	61 keys
Left-hand control	MIDI + 2>External control	Arpeggiator, Chord Play

The Roland U-20 is a PCM-sample synthesizer, released by Roland in 1988.^[3]

The U-20 is described by Roland as a 'RS-PCM keyboard', where RS stands for ReSynthesized because the sound-engine can play back a modified version of stored PCM samples.^[4]

Overview[edit]

The synthesizer engine itself merely plays back stored PCM samples. Such a synthesizer is known as a rompler, as opposed to a sampler, which lets you record and load in custom samples. Nevertheless, sample playback can be slightly customized via editing its ADSR envelope and applying DSP effects, like reverb or chorus. A drawback is the absence of filters.

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The U-20 has standard 64 patches, and can be doubled with an optional RAM-card (the M-256E). Also there are 2 extra slots for ROM PCM-cards to expand the number of sounds.

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There's a built-in arpeggiator, a Chord Play feature which plays back a full chord with only one finger, 2 assignable sliders, and the U-20 is compatible with the SN-U110 and SN-MV30-S1 series of soundcards.^[5]

With one U-20 it's possible to produce a reasonably complete orchestration. The maximum number of voices is then limited by the device itself.

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The U-20 has given certain Roland-sounds more publicity, like the shakuhachi, the bell, guitar-samples with distortion, and the typical Roland piano-sound, which can be found in later Roland models like the JV and XV series. Ultra thin power bank user manual.

Editing sounds is limited and relatively complicated due to the small screen and menu layout. Thanks to its popularity, later on there was software made available to edit sounds on a computer via MIDI, or by adding new sounds to the device.^[6] There are also hardware presets in programs like Cubase allowing easier communication.

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U-220[edit]

The U-220 is a 1U (19-inch rackmount) module of the U-20. Humax hd-fox t2 user manual download. It was the successor of the U-110 that was released in 1988. The U-220 has the same LCD screen and expansion possibilities, but less knobs on the front panel than the U-20.

Features[edit]

A collection of traditional Christmas music performed by James D. Blodget on a Roland U-20 synthesizer, demonstrating many of its sounds. (8 MB)
Problems playing this file? See media help.

128 different voices (additional may be supplied with ROM/RAM cards)
Programmable DSP unit offers reverb, delay, chorus
3 demo songs
61 keys with note velocity and aftertouch abilities
MIDI In/Out/Thru DIN connectors
Phones output, Mix Output (L/R) and Direct Output (L/R) jacks
Pedal switch and Expression pedal inputs
Powered by external 110-230 V AC source

Issues[edit]

The amount of force needed to trigger aftertouch is very impractical and thus unusable on this instrument. Another point of criticism was the poor readable manual. Besides that, the U-20 has structural problems with the key sensors, they need regular cleaning or replacement because certain keys malfunction over time.^[7]

External links[edit]

References[edit]

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^'Roland U20 (MT Aug 89)'. www.muzines.co.uk. Retrieved 2018-09-03.
^'Roland U-20 | Vintage Synth Explorer'. www.vintagesynth.com. Retrieved 2018-09-03.
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Retrieved from 'https://en.wikipedia.org/w/index.php?title=Roland_U-20&oldid=928649141'

Roland U-20 Service Manual covers following topics:

How to repair Roland U-20?
How to maintain and fix your Roland U-20?
Specifications, Location of Controls, Exploded View,
Parts List, Loading Factory Preset Data, Test Mode, IC Data,
Block Diagram, Circuit Diagram and Board

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