Upgrade Manual

Appendix A: "Audio Plugins"76
Feedback:
The number of times the echo will repeat.
Mix:
Relative balance between the original signal and the echoes.
Modulation:
When Modulation is enabled, the pitch of the echo is modulated,
or "wobbled".
Rate:
The speed at which the pitch is modulated.
Random:
Make the modulation Rate slightly unstable, so it has a less
mechanical sound.
Depth:
The amount of pitch change.
Slight pitch modulation can make an echoed track sound "fatter" by beating the
pitch of the delayed signal against the unmodified pitch of the original signal.
Old tape-based echo units, such as Echoplex, had cheap tape transports. These
units had a lot of wow-and-flutter in the tape speed, which wobbled the pitch of
the echo. That is one reason tape-based echo units sounded fatter and more
musical than many modern digital delay units. Adjust the modulation controls to
emulate this aspect of a tape-based echo unit.
Feedback EQ:
Old tape echo units did not have flat frequency response.
Sometimes highs would fade away before lows, and on other units the lows
would die away before the highs.
The Echoplex was designed to have a peak in the upper midrange, with low freq
and high freq rolloff. The Echoplex was excellent for many guitar and voice
effects, giving a spacious sound without making the musical lines muddy.
Enable Feedback EQ to emulate some of the old tape-based echo effects. The
Feedback EQ only affects the signal on the delay line; it doesn't affect the tone
of the dry signal.
The Feedback EQ is a three-band cut-only parametric EQ. It is a cut-only effect,
to avoid runaway feedback at extreme settings.
For a bright echo decay, assign one or more of the EQ bands to cut lows and
mids. For mellow echo decay, assign EQ bands to cut highs.
Chorus
A chorus of voices sounds thick, because each individual voice has slightly
different pitch and timing. The Chorus effect attempts to mimic this effect by
adding pitch- and time-modified copies to the source signal.