Version OS 1.0
7.2.3 CH/OH Page 3 A (only Hi Hat Filter)
This page only describes the Hi Hat filter section and applies to the two instruments
Closed Hi Hat and Open Hi Hat. It's different from the other four channels with
multimode filter (Clap, Rim, Crash and Ride). Two 6dB filters form a band pass that has
peak. Tweak both part filters to get your desired result.
If LpCut = <127> and HpCut = <000>, the filter has its largest bandwidth. This filter,
however, is optimized for Hi Hat sounds and has therefore a limited bandwidth that cuts
well below 250hz even with maximum adjustments. In order to have a flat frequency
response on a Hi Hat channel, turn off the filter with Routing = <000>.
7.2.3.1 LpCut = Low Pass Cutoff < 000-127 >
Controls the cutoff of the 6dB low pass filter of the HiHat filter. With a value of <127>
the low pass filter is opened to the maximum. At lower values higher frequencies are
filtered away (duller).
7.2.3.2 HpCut = High Pass Cutoff < 000-127 >
Controls the cutoff of the 6dB high pass filter of the HiHat filter.
7.2.3.3 Res = Resonance < 000-127 >
This parameter controls the resonance of the resulting band pass filter. <000> means
that the filter doesn’t have resonance. Even at maximum peak the filter will not
resonate but only become nosy.
7.2.3.4 Rout = Filter Routing < 000-001 >
The filter routing switches between pure sample playback and filtered playback.
Routing = <000>: No filter, no metal noise.
Only sample playback through the analog final VCA.
Routing = <001>: With Hi Hat filter, optional metal noise.
The sample is mixed to metal noise (if activated), led through the filter and played back
through the analog final VCA.
ALPHA BASE Operating Manual 49
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