The Lfo - Schippmann ebbe und flut User Manual

back: (4)(RING) TRIG-S&H
The socket "TRIG-S&H" (4)(RING) can be used as an external input for the gate. On principle, each
alternating signal (audio, modulation) can be used for the gate, a minimum voltage of +3 Volts is requi-
red.
Input: 0 Volts / no action:
Input: transition from 0 Volts to +3 Volts:
Each transition from 0 Volts to +3 Voltss at the "TRIG-S&H"-input generates o n e sample of the source
input and is held at the output.

9.4 The LFO

The LFO contains the control elements [wave] (23), [LED] (23a) and [speed] (24) on the frontpanel
and the rearpanel sockets "LFO OUT" (4) and "SYNC"/"SPEED" (6). An LFO is a Low Frequency Oscil-
lator, that generates slow and frequent modulations like vibrato. This LFO is voltage controlled and
capable to generate periodes of many minutes up to the audio frequency range, almost 20 kHz.
SYNC (6t)
SPEED (6r)
speed (24)
Fig. 9.4.1 LFO
front: (23) [speed]
The [speed]-knob controls the LFO-frequency.
for the waveforms triangle and square:
0.008 Hz (120 second-periods) – 2 kHz
for the waveform saw:
0.016 Hz (60 second-periods) – 3.2 kHz
The scaling is approx. 1.8 octaves (x 3.5) per mark (30°)
This results in an entire range of approx. 18 octaves (x 250.000).
Saw has the almost double frequency of triangle/square, in order to keep the ramps of saw and triang-
le identical.
inactiv
waveform
(23)
tri
LFO OUT
saw
LFO
rect
activ (sample & hold)
(4t)
LFO
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