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Using the internal sound generator
Portamento SW [cc#65] ON/OFF, (PATCH: Native mode only)
Turn this ON when you want to use portamento.
Portamento Time [cc#5] 0–127, (PATCH: Native mode only)
Adjusts the time over which the next pitch will be reached.
Portamento is a function that changes the pitch smoothly from one note to the next.
Portamento will be switched on/off when a Portamento message is received. Portamento Time specifies
the speed of the pitch change. A Portamento Control message can be received to specify the “source note
number” (the previously played note).
* When you apply portamento by playing a note that is below the currently played note, the range of the effect may be
limited (approximately two octaves).
Filter
You can adjust the tonal character of the sound by editing the filter values. The filters of the SD-80 are a
type called Low Pass Filters, which pass the region of sound that lies below a specified frequency. This
frequency is called the Cutoff Frequency. By adjusting the cutoff frequency, you can make the sound
brighter or darker.
The cutoff frequency will also change over time according to an envelope. By adjusting the filter and
envelope, you can create sounds that have movement and expression.
fig.p8-1j
TVF Resonance [cc#71] -64–0–+63
Increasing the resonance value will emphasize the harmonics in the region of the cutoff frequency, giving
a distinctive character to the sound.
* For some sounds, negative (-) settings of Resonance will not produce any audible difference.
fig.p8-2j
TVF Cutoff Freq (TVF Cutoff Frequency) [cc#74] -64–0–+63
Sets the cutoff frequency of the filter.
Positive (+) settings for the Brightness parameter will raise the cutoff frequency. Negative (-) settings will
lower the cutoff frequency. Increasing this value in the positive direction will pass more of the high-
frequency component, making the sound brighter (harder). Increasing this value in the negative direction
will cut more of the high-frequency component, making the sound more mellow (darker).
* For some sounds, positive (+) settings of TVF Cutoff Freq will not produce any audible difference.
Higher frequencies
Lower frequencies
Cutoff frequency
Low
pass
filter
Resonance
Low High
Cutoff frequency
Frequency
Level