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The NN-19 Virtual Keyboard Display > The Oscillator Section - Pg. 248

To demonstrate the capabilities of the Filter Envelope, try the following exercise. Make sure that your NN-19 sequencer track is armed to receive MIDI signals. 1. Use the patch browser window to locate and load a good patch to work with. I suggest the Bright Piano patch in the Piano folder of the Reason Factory Sound Bank. Once it is loaded, notice the filter settings of this patch. Use your mouse to increase the value of the Attack parameter. Play a chord on your keyboard and notice the sweeping effect it produces. Because the Filter mode is set to LP 12, using the envelope with a slow attack causes the filter to first play the lower frequencies, followed by the higher frequencies of the sample. Note that the Filter Frequency slider determines the higher frequencies. Now decrease the value of the Decay parameter. Play a chord and notice how the filter abruptly closes as soon as the Attack reaches its maximum value. Also notice how there is still a long sustain after the filter closes. Now decrease the value of the Sustain parameter and listen to how fast the filter opens and closes. With both the Decay and Sustain set to such low values, the Release parameter will have virtually no effect on your sample. Let's change that by increasing both the Decay and Sustain parameters to their maximum values. Now set the Release to 0 and play a chord on your keyboard, and then release the notes. Notice how quickly the envelope closes. 2. 3. 4. 5. The Amplitude Envelope (AMP ENVELOPE) is used to shape the volume characteristics of the sample. This is useful for creating very long sustained patches (such as pads), or medium to short sustained patches (such as bass guitars or drums). The same types of parameters are available here (Attack, Decay, Sustain, and Release). The included level knob to the left of the Amplitude Envelope is used as a Master Level for the NN-19. To experiment with the Amplitude Envelope, try using the previous exercise as a road map to guide you through the different envelope parameters. The LFO Section No synth would be complete without an LFO, or Low Frequency Oscillator (see Figure 11.14). Like a standard oscillator, LFOs can generate a waveform and frequency, but there are two distinct differences between them: An LFO is capable of generating waveforms with a low frequency, hence the name LFO. Figure 11.14 The NN-19 LFO section is used to adjust the Low Frequency Oscillator.