User manual

8. Panel Reference: Filter NORD LEAD 2X V1.0x

Page 48

velope Amount knob, can be used to make the Filter frequency vary as the sound progresses, when you

press and hold a key. For a theoretical introduction to filters, see page 85.

T T

LP 12

LP 12LP 12

LP 12

LP stands for low-pass. A low-pass filter lets low frequencies pass and cuts out higher frequencies. Exactly

which frequencies get cut out is determined by the Filter Frequency setting (and various other controls,

as described below).

In the 12dB low-pass mode, the filter has a gentle roll-off curve (12dB=2poles). This mode leaves more

harmonics than the 24dB variation discussed below. This type of filter has been used in various Oberheim

synthesizers and others.

LP 24

LP 24 LP 24

LP 24

This is the classic synth filter used in the Minimoog and Prophet-5, among others. It cuts out high fre-

quencies rather drastically (24db=4 poles).

HP 24

HP 24HP 24

HP 24

HP stands for high-pass. This filter is the opposite of the lowpass filter, that is it lets the high frequencies

pass and cuts out low frequencies. The filter has a rather steep curve.