Kurzweil:Two-pole Lowpass
From Sonikmatter
The Two-pole Lowpass Filter (2POLE LOWPASS) is probably the most abused of all filters and probably the single most used block on the K2000. It is the filter that creates most of those filter sweeps heard on nearly every techno, dance and electronic music track of the 90's.
It is similar to the One-pole Lowpass Filter except that it features feedback and a resonance control. This filter occupies 2 blocks and as such has 2 control pages. The first is for cutoff frequency and the second is resonance.
While it attenuates high frequency component's in the same way as the One-pole Lowpass Filter, the signal at the cutoff frequency is amplified by the resonance control and this creates ringing at that frequency.
Sweeping the cutoff frequency by assigning it to a controller while the resonance is turned up creates the classic bass and lead shounds, of the dance music genre's. The cutoff frequency can be assigned to envelopes or to the AMPENV if you want to try to emulate the classic TB-303 sound.
Sawtooth waves and other sounds rich in harmonic content work best with this filter. Examples include square waves and violin or string samples.
Tutorials that use this block
Back to DSP Blocks
The Puppeteer 22:06, 3 Jul 2005 (EDT)
| Main Page : | Documentation : | FAQ : | DSP Blocks : | KDFX : | Algorithms |
