LinPlug Spectral - Manual (Page 62)

Delay (Modulation-Delay)
This Modulation-Delay effect can be used to create echoes and other
related effects. It works in Stereo, but the delay times for the left and right
channel are always the same. For more control over the time of each
channel use either the Stereo Delay or the Ping Pong Delay described
next.
The Time dial is used for setting the delay time (in milliseconds). This can
range from 1 ms to 1300 ms and is displayed above the dial.
The time display also functions as a Sync popup menu which can be used
to sync the delay time with the current host (DAW) tempo (see Appendix A
for the range of possible sync settings).
The Feedback dial allows you to adjust the number of times the signal
repeats or echoes.
Also included in the Delay section is a variable high pass and low pass 6dB
per Octave filter which is adjusted with the next two dials:
The Highpass (High Pass Filter Cutoff Frequency) dial is used to set the
frequency (in Hz) below which frequencies are filtered out of the signal.
Higher settings produce thinner, brighter sounds, while lower settings
produce the full sounds including low frequencies.
The Lowpass (Low Pass Filter Cutoff Frequency) dial is used to set the
frequency (in Hz) above which frequencies are filtered out of the signal.
Higher settings produce the full, bright sounds while lower settings result in
darker sounds.
The Stereo dial allows adjustment of the stereo-width, when modulation is
applied. For the full stereo effect keep it set fully right. The more you move