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Welcome To The Machine via Logic's ES2
Computer Music, Mon 8 Jun 2009, 2:23 pm UTC

Step 9: Finally, let's use a bit of LFO modulation on the filter cutoff. We've set the fourth modulation slot to modulate Cutoff 2 with LFO2 via Envelope 1. With the settings we've used, this creates quite a subtle effect, so if you want something a bit more drastic you can automate the filter cutoff yourself.