Roland Piano Modifying the Brightness of a Sound with a Filter TVF, Creating a Patch, Filter Type

Creating a Patch

Modifying the Brightness of a Sound with a Filter (TVF)

For details on the setting, refer to “How to Make the Patch Settings” (p. 42).

TVF

Filter Type

Selects the type of filter. A filter is a function that cuts off a specific frequency band to change a sounds brightness, thickness, and other qualities.

Value

OFF: No filter is used.

LPF: Low Pass Filter. This reduces the volume of all frequencies above the cutoff frequency (Cutoff Freq). in order to round off, or un-brighten, the sound. This is the most common filter used in synthesizers.

BPF: Band Pass Filter. This leaves only the frequencies in the region of the cutoff frequency (Cutoff Freq), and cuts the rest. This can be useful when creating distinctive sounds.

HPF: High Pass Filter. This cuts the frequencies in the region below the cutoff frequency (Cutoff Freq). This is suitable for creating percussive sounds emphasizing their higher ones.

PKG: Peaking Filter. This emphasizes the frequencies in the region of the cutoff frequency (Cutoff Freq). You can use this to create wah- wah effects by employing an LFO to change the cutoff frequency cyclically.

LPF2: Low Pass Filter 2. Although frequency components above the Cutoff frequency (Cutoff Freq) are cut, the sensitivity of this filter is half that of the LPF. This makes it a comparatively warmer low pass filter. This filter is good for use with simulated instrument sounds such as the acoustic piano.

LPF3: Low Pass Filter 3. Although frequency components above the Cutoff frequency (Cutoff Freq) are cut, the sensitivity of this filter changes according to the Cutoff frequency. While this filter is also good for use with simulated acoustic instrument sounds, the nuance it exhibits differs from that of the LPF2, even with the same TVF Envelope settings.

If you set “LPF2” or “LPF3,” the setting for the Resonance parameter will be ignored.

Cutoff Freq (Cutoff Frequency) ★

Selects the frequency at which the filter begins to have an effect on the waveform’s frequency components.

Value: 0–127

With “LPF/LPF2/LPF3” selected for the Filter Type parameter, lower cutoff frequency settings reduce a tone’s upper harmonics for a more rounded, warmer sound. Higher settings make it sound brighter.

If “BPF” is selected, harmonic components will change depending on the TVF Cutoff Frequency setting. This can be useful when creating distinctive sounds.

With “HPF” selected, higher Cutoff Frequency settings will reduce lower harmonics to emphasize just the brighter components of the sound.

With “PKG” selected, the harmonics to be emphasized will vary depending on Cutoff Frequency setting.

To edit the overall patch while preserving the relative differences in the Cutoff Frequency values set for each tone, set the Cutoff Offset parameter (PATCH/General) (p. 47).

Cutoff KF (Cutoff Frequency Key Follow)

Use this parameter if you want the cutoff frequency to change according to the key that is pressed. Relative to the cutoff frequency at the C4 key (center C), positive (+) settings will cause the cutoff frequency to rise for notes higher than C4, and negative (-) settings will cause the cutoff frequency to fall for notes higher than C4. Larger settings will produce greater change.

Value: -200, -190, -180, -170, -160, -150, -140, -130, -120, -110, -100, -90, -80, -70, -60, -50, -40, -30, -20, -10, 0, +10, +20, +30, +40, +50, +60, +70, +80, +90, +100, +110, +120, +130, +140, +150, +160, +170, +180, +190, +200

Cutoff frequency
(Octave)
					+200	+100
+2
						+50
+1
o						0
-1
						-50
-2
					-200	-100
C1	C2	C3	C4	C5	C6	C7	Key

The cutoff frequency key follow setting appearing at the lower part of the TVF settings screen graphically depict the current values of the settings. Solid lines represent the cutoff frequency key follow setting, while dotted lines are used for the TVA bias settings. This lets you compare the TVF cutoff frequency key follow setting and the TVA bias settings while you make settings.

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