Dave Smith Instruments Evolver User Manual download pdf (Page 25)

Note: There is a clip indicator on the right side of the VCA box; this gives you an

indication of signal levels between the analog and digital electronics. Occasional

clip LED flashes are okay.

High-Pass Filter

Frequency: 0…99 – Sets the cutoff frequency of the four-pole high-pass filter. When

the HP Pre/Post parameter in the Misc Params section is set to Pre(After ExtIn) the

high-pass filter is inserted before the analog low-pass filter, and only affects external

audio input.

When the HP Pre/Post parameter is set to Post (After VCA), the high-pass filter is

placed after the analog low-pass filter and VCA (but before the Delay) and filters the

Evolver’s audio accordingly. Refer to the Signal Flow diagram on page 8 for details on

the signal path. There are two separate high-pass filters, one for each channel, and

they are controlled in tandem.

Remember that any of the modulation sources can be routed to control the High-pass

Filter. For example, Envelope 3 can be dedicated to the High-pass.

Note: If the High-pass Amount is set to zero, modulating the High-pass filter will

have no effect.

Tuned Feedback

Feedback is implemented via two identical tuned delay lines, one for each channel.

See the diagram on page 8 for details on the signal path. Since the delay is tuned, it

can be played by modulating the feedback frequency, from the sequencer or other

sources.

Note: Feedback can also be used to implement plucked string physical models.

Use Envelope 3 with Noise as a destination (all oscillators off). Play around with

different Feedback Levels, and adjust the filter cutoff frequency.

Frequency: 0…48 – Sets the base frequency of the main feedback loop. It steps in

semitones from C0 to C4 (0 - 48) for a four octave range. The exact frequency is

influenced by other factors, such as the filter frequency and number of poles, which

can drive it slightly sharp or flat.

Level: 0…100 – Sets the level of feedback. As the level goes up, the feedback will

eventually oscillate at the set Frequency. Medium levels of feedback add depth and

movement to the sound.

Grunge: OFF…On – When on, it enables nasty feedback at higher levels. It has no

effect at lower levels of feedback.

Distortion

Distortion: 0…99 – Sets the amount of distortion. There are two separate

distortions, one for each channel. When the Dist Pre/Post parameter in the Misc

Params section is set to Pre(After ExtIn), the distortion is introduced before the analog

filter, and only affects external input. When the Dist Pre/Post parameter is set to Post

(After VCA), the distortion is introduced after the analog filter, VCA, and High-pass,

but before the Delay.

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Dave Smith Instruments Evolver User Manual Page 25