FXpansion EtchRed - Manual (Page 20)

Etch Operation Manual 20
© 2012 FXpansion Audio
4.4 Sample and Hold (S&H)
The Sample and Hold (S&H) function is designed to output a stream of
varied modulation values and act as a 'random LFO'.
By default, a dedicated internal noise signal is sampled and held
periodically (with the period dictated by the Rate control). When a clock
pulse occurs, the dedicated internal noise signal is 'sampled' - its
current value is 'snapshotted' - and held constant at the sampled value
until the next clock pulse, when the process repeats.
Sync button
With the Sync button enabled, the Rate control is set in BPM values
derived from the Reason tempo.
With the Sync button disabled, the Rate control is set in Hz.
The behaviour of the Sync function is explained in more detail here.
Rate [ w /Tra n sM od a m ou n t]
The Rate control dictates the speed of the sample and hold process.
Slew
The Slew control introduces lag between each sampled and held value, resulting in a smoother
transition between values instead of abrupt changes with the control at the minimum setting.
Gain [ w /Tra n sM od a m ou n t]
The Gain control offers a final attenuation control for the output of the module before it enters the
TransMod modulation system. At 100%, no attenuation is applied to the output modulation signal.
This control is intended to be modulated by other TransMod sources for dynamic, evolving
modulation effects.
Sample & Hold connections
S&H Override input
The S&H Override input can be connected to
an external audio source to use with the
S&H in place of its internal noise source.
With the input connected, the S&H module
operates on the connected signal. When it is
disconnected, the internal noise source is
used.
S&H Retrigger input
The S&H Retrigger input can be connected
to a suitable source of trigger signals, such
as gates, LFOs etc, to trigger the S&H
function.
This function is applied in addition to the
internal clock. To trigger S&H events only
with an external gate or clock, set the Rate
parameter to a frequency lower than the
external gate/clock.
Sample & Hold output
The Sample & Hold output provides the output from the S&H modulator so that it can be used to
modulate parameters in other Reason devices.