Table of Contents
Advertisement
Programming Examples
HereÕs whatÕs happening. The square wave of the LFO cycles from +1 to -1. Every time this
occurs, the random signal generator (RandV1) randomly picks a value which changes the
frequency of the parametric EQ. There are lots of ways to set up sample and hold effects, but the
FUN is the basic element. In this case, every time the value of the FUNÕs Input a (LFO1) becomes
greater than +.5, the value of Input b (RandV1) is sampled. That value becomes the FUNÕs
output until the next time the value of Input a becomes greater than +.5 (see Chapter 17 for
more). In this example, the FUNÕs output modulates the frequency of the EQ, and causes rapid
changes in timbre.
Now weÕll apply the FUN to control the pitch of the sound as well. Press either of the <more>
soft buttons until the PITCH soft button is visible, and press it to select the PITCH page. Select
the Src1 parameter and set its value to FUN1. Select the Depth parameter and set its value to 400
cents. Now the soundÕs pitch will ßuctuate in sync with the EQ effect.
Example 4
SHAPER and PANNER
Our next example incorporates two of the DSP functions, and will give you a general overview
of using the algorithms to build sounds.
Starting with Program 199, press Edit, and while youÕre on the ALG page, cursor up to the
Algorithm parameter, and select Algorithm 13. Select values of NONE in the F1 and F2 blocks.
The value of the F3 block is already set to PANNER, as shown below.
errR®rrterrR®rrterrR®rrterrR®rrtYrrR®rrty
dPITCH|gkNONE||gkNONE||gkPANNERG;AMP|||GH
cvvvvvvbcvvvvvvbcvvvvvvbcvvvvvvbNvvvvvvbn
Next press the KEYMAP soft button to select the KEYMAP page, and select 163 Sine Wave as
the keymap. Play a few notes to accustom you ear to the sound of the unshaped sine wave. Then
return to the ALG page, and select SHAPER for the algorithmÕs F1 block. YouÕll notice a bit of an
effect right away. The SHAPER DSP function adds additional high frequency partials to the
waveform in unpredictable ways, resulting in large changes in timbre. For more on the
SHAPER, see page 16-46.
errR®rrterrR®rrterrR®rrterrR®rrtYrrR®rrty
dPITCH|gkSHAPERgkNONE||gkPANNERG;AMP|||GH
cvvvvvvbcvvvvvvbcvvvvvvbcvvvvvvbNvvvvvvbn
Press the more> soft button, then press the F1 AMT soft button. This enables you to adjust the
amount of shaping applied to the sine wave. Try different values for the Adjust parameter, then
set it to its minimumÑ0.100x. Then cursor down to the VelTrk parameter, and set a value of 0.70.
Listen for the variation in the effect as you play with different attack velocities.
Now go back to the KEYMAP page, and select different keymaps so you can hear the SHAPERÕs
effect on different sounds. When youÕre Þnished experimenting, set the Keymap parameter at
152 Dull Sawtooth.
Notice how notes on the high end tend to break up. If you return to the F1 AMT page you can
reduce this distortion and/or aliasing with the KStart and KeyTrk parameters.
20-7
Advertisement
Table of Contents
