Roland MC-909 Rhythm Edit, How Percussion Instruments Are Organized, Rhythm editing procedure

Rhythm Edit

How Percussion Instruments Are Organized

A Rhythm Set is a collection of Rhythm Tones, each of which represents a percussion instrument played on a single key. An instrument consists of the following four elements.

Rhythm Set

Note Number 74 (D5)

Note Number 73 (C#5)

Note Number 60 (C4)

Note Number 59 (B3)

Rhythm Tone (Percussion instrument sound)

	WG		TVF		TVA
	Pitch		TVF		TVA
Envelope		Envelope		Envelope

WG (Wave Generator)

This specifies the PCM waveform (or “wave”) that forms the basis of the Rhythm Tone - four waveforms can be assigned to each Rhythm Tone. You can also determine how the pitch of the Rhythm Tone will change.

The MC-909 has 693 different waveforms. (See Waveform List p. 150.)

All Rhythm Sets built into the MC-909 consist of Rhythm Tones based on these waveforms.

TVF (Time Variant Filter)

This sets how the frequency characteristics of the Rhythm Tone will change.

TVA (Time Variant Amplifier)

This sets how the Rhythm Tone’s volume and stereo positioning will change.

Envelope

An envelope applies changes to the Rhythm Tone over time. There are separate envelopes for pitch, TVF (filter) and TVA (volume). For example, you would use the TVA Envelope to modify the way in which the Rhythm Tone attacks and decays.

Selecting the Wave(s) That Will Sound

Turn “on” the wave(s) that you want to sound. If you want to hear just a specific wave, turn the other waves “off.”

Press TONE SWITCH [1]–[4]to switch a wave on (button’s indicator lit) or off (indicator extinguished).

Rhythm editing procedure

1.In the top screen of Patch/Sample mode, move the cursor to the rhythm set that you want to edit.

2.Press [F2 (Edit)] to access the edit screen.

3.Use [F1] [F2] or [CURSOR (left/right)] to select a parameter group.

4.Use [CURSOR (up/down)] to select a parameter.

5.Use [VALUE] or [INC/DEC] to edit the parameter.

*You can also use the panel knobs and sliders to edit the sound (p. 52).

6.When you are finished editing, press [EXIT] to return to the top screen.

Selecting the rhythm tone to edit

Press a velocity pad 1–16 to select the rhythm tone that you want to edit.

Selecting the wave that you want to edit

Press TONE SELECT [1]–[4] to illuminate the button for the wave that you want to edit.

*By simultaneously pressing two or more [TONE SELECT] buttons, you can simultaneously select two or more waves.

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