Erica Synths LXR Eurorack Drum Module (28 HP) - Manual (Page 22)

touched for some minutes, the display will show the screensaver. As soon as any control is touched,
the display will show the menu again. The screensaver can be deactivated in the settings menu.
6. Synth modules
In this chapter we will have a closer look at the synth modules used in the different voices.
6.1. Oscillator
The oscillators provide 6 different waveforms:
• Sine
• Triangle
• Saw
• Rectangle
• Noise
• PWM
The waveforms are classic analogue waveforms realized using bandlimited wavetable oscillators.
6.2. Filter
The filter is a 2 pole (12dB) state variable filter (SVF). It's used to shape the harmonic content of
the sound. For example a hihat sound consists of high frequencies and no low frequencies, so you
want to use a highpass filter. A clap has lots of mid sounds, here a bandpass filter is useful.
There are 3 parameters that control the filter response. Frequency, resonance and drive.
6.2.1. Frequency
The frequency determines the operating point of the filter in the spectrum. For example a low pass
filter will cut off all frequencies above its set cutoff frequency (all frequencies below it pass the
filter unaltered – hence the name).
6.2.2. Resonance
The resonance controls the feedback path of the filter. With higher resonance settings the
frequencies around the operating point (i.e. the set frequency) will be amplified more and more.
It becomes clear if we look at the filter amplitude response plots in the next section.
LXR Owners Manual - 22 -