Chapter 1. Overview of the XV-88

Chapter 1

How the XV-88 Is Organized

Basic Structure

The XV-88 can be broadly divided into two sections: a

keyboard controller section and a sound generator

section. The two sections are connected internally by means

of MIDI.

fig.01-01.e

Sound

Generator

Section

Play

Keyboard Controller Section (controllers

such as keyboard, pitch bend lever, etc.)

Keyboard Controller Section

This section consists of the keyboard, pitch bend/modulation lever, panel sliders, and D Beam controller. It also includes any pedals that may be connected to the rear panel. Actions such as pressing and releasing of keys on the keyboard, depressing a pedal, and so forth, are converted to MIDI messages and sent to the sound generator section, or to an external MIDI device.

When playing in Performance mode, the settings for the MIDI connections between the keyboard controller section and the sound generator section or external MIDI device are made in Zone mode (p. 57).

Sound Generator Section

The sound generator section produces the sound. Here, MIDI messages received from the keyboard controller section or external MIDI device are converted to musical signals, which are then output as analog signals from the OUTPUT and PHONES jacks.

About the Local Switch

The switch that connects and disconnects the MIDI connection between the keyboard controller section and the sound generator section is called the Local switch. Since essential information describing what is being played on the keyboard won’t reach the sound generator if the Local switch is set to OFF, the Local switch should normally be left ON.

However, if while performing you want to send that performance data to an external sequencer as MIDI messages to be recorded, you then perform with the externally connected MIDI sequencer set to MIDI Thru (whereby data received from MIDI IN is then output from the MIDI OUT with no changes made to the data), the XV-88’s Local switch to OFF, and the MIDI Transmit switch and MIDI Receive switch to ON.

fig.01-02.e

Recording Sequencer

MIDI Thru: On

MIDI IN MIDI OUT

MIDI OUT

MIDI IN

 

Transmit

Receive Switch: On

Switch:

 

 

On

 

 

 

 

Sound

 

 

Generator

 

Local Switch: Off

Section

 

 

Keyboard Controller

 

 

Section

 

 

 

XV-88

In this case, the data sent over two paths, i.e., the data sent directly from the keyboard controller section and the data sent from the keyboard controller section via the external sequencer, ends up being sent to the sound generator section simultaneously. Thus, for example, even when you play a “C” key only once, the note “C” cannot be sounded correctly, as the sound is played by the sound generator section twice.

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Roland owner manual Overview, How the XV-88 Is Organized, Basic Structure