ВЧ фильтр

Evolver имеет 2 одинаковых 4-полюсных цифровых ВЧ фильтра (ФВЧ). ВЧ фильтры обратны НЧ фильтрам: они блокируют низкие частоты, и пропускают высокие частоты.

ВЧ фильтры Evolver считаются как единый фильтр, и будут упоминаться как один фильтр далее.

The HPF can be placed in one of two locations in Evolver’s signal path. It can be placed either after the low-pass filter, before the delay (for synth sounds), or following the external input (for processing external audio).

Evolver’s HPF is digital, unlike the LPF, which is analog. Because the HPF is digital, it shouldn’t exhibit any of the variation of the dual analog low-pass filters, so treating it as a single stereo filter is fine.

Evolver’s HPF is only available in 4-pole configuration and has no resonance control.

The HPF has only a single parameter: Highpass (“Hi-pass Filter”). The single parameter controls both cutoff frequency and where in the audio path the filter is placed:

• 0 = HPF is completely bypassed and is not in the circuit.

• o 1 - o99 = HPF on the oscillators. As the value rises to 99, the cutoff frequency rises. At 99 only the highest frequencies are let through.

• i 0 - i99 = HPF on the input. As the value rises, the cutoff frequency rises. At 99, only the highest frequencies from the input are let through.

The highpass filter has an undocumented feature: When set to “0”, it is removed completely from the circuit.

So if you map the highpass filter to a controller, such as the mod wheel, you must set the highpass filter’s frequency parameter to 1 or higher (whether it is being used for the oscillators or the external input) to get any effect at all. If you leave it at zero, all the modulation in the world won’t make it do anything.

Дата добавления: 2015-08-20