General Rapture filter info: 1). Choose a routing in the DSP section; otherwise, the filters are out of the signal path.
To experiment wth one filter only, select a serial routing (like
01. DSP1 -> DSP2 -> F1 -> DSP3 -> F2). Parallel routings (example:
04. F1 ->DSP1 ->DSP2 || F2 - DSP3) split the filters on two branches, and it's more difficult to hear what one or the other is doing alone.
2). Select a filter type.
That's going to make a huge difference whether the filter acts above, below, or around the Cutoff knob position, or whether the filters break up at high resonances (ex. - LPS 2).
3). Adjust the Cutoff and/or Res knob.
This is the starting point(s) of the filter. Any Cut LFO, stepgen, or envelope that you enable will
add or
subtract from this initial 'knob' position. The Cutoff is measured in Hertz; the resonance units are in deciBels.
General Filter EG info: 1). Enable the Cut 1/2 Status.
It's very easy to overlook this parameter. It takes the filter envelope in & out of the signal chain.
2). Set the Cut 1/2 Depth.
The default amount is 12000. That's ten full octaves (10 X 1200 'cents' per octave) above your initial Cutoff knob setting. Don't leave it there for now; that much range can develop into filter actions higher than you can hear (depending on the other filter settings). Start out with a few thousand 'cents' instead.
This sets the upper limit of your envelope shape (level 1.000, or the top horizontal line in the EG display). The lowest horizontal line is where your Cutoff knob is currently positioned (in a virtual sense; at 0.000). Depth can be positive or negative. The EG will either add to, or subtract from, the selected filter over time.
3). Create an envelope, using multiple nodes and segments.
Here's where the relationship between time and filter depth is established. At default, the EG display wll show one second of time elapsed, from left to right. 'Time'
always begins when you press a note on your keyboard. Another separate filter is generated for each note that you play. The EG display represents the shape of
each of those individual filters.
4). Adjust the node positions and segments to taste.
With Rapture's breakpoint envelopes, you're telling the filter here that you want
this depth to occur at
this point in time. A node represents both a point in time (horizontally), and how much level that you want added/subtracted from the initial Cutoff knob setting (vertically in the EG display).
{For more information,
see the
Nodes, Segments, and Shapes or
Multiple AttackDecayRelease tutorials.}
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Edit: There are many more parameters to explore here that greatly affect the filters, but this should get you started. If you'd like to try an easy filter tutorial with clear results,
see the
'Say Yay' tutorial. It uses opposing LFOs to create the effect, but you could just as easily substitute two filter envelopes instead.
Disregard or disable the LFOs in that setup. Create a Cut1 EG envelope shape at a positive Depth (2400 cents/ 2 octaves is a good place to start). Copy the whole Modulator from the right-click context menu, and Paste Modulator into Cut2. Then change the Depth setting in the Cut2 EG to -2400. These examples use parallel filter routings with two complimentary filters.
post edited by b rock - 2008/03/08 10:16:49