Moog Music MF-104Z Analog Delay - Manual (Page 5)

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9. Switch the BYPASS light to green. Continuing to play your
instrument, turn the MIX control clockwise. When the MIX control is
at 0, you will hear just the direct (undelayed) signal. When the MIX
control is at 5 (midposition), you will hear both the direct and
delayed signal. When the MIX control is at 10, you will hear just the
delayed signal. Note that the delayed signal has a softer, more muted
quality than the direct signal, - just as natural echoes are softer and
more muted than direct sounds.
10. Set the MIX control to 5, so you hear both the direct and delayed
signals. Vary the setting of the DELAY TIME control. When the
control is fully counterclockwise, the delay is very short, - about 50
milliseconds. (A millisecond is a thousandth of a second.) When the
control is fully clockwise, the delay is about 500 milliseconds. Note
that when you turn the DELAY TIME control while you're playing,
the pitch will change briefly. This is because turning the DELAY
TIME
control causes your sound to stretch or compress as it goes
through the delay circuit, thereby speeding up or slowing down the
vibrations.
11. Set the left switch to LONG. This doubles the delay time. It also
imparts an even more muted quality to the delayed signal.
Experiment with various settings of the DELAY TIME control and the
SHORT-LONG
switch to get a feeling for how they affect the delayed
signal.
12. Return the left switch to SHORT and the DELAY TIME control to
midposition. Turn the FEEDBACK control slowly clockwise. You will
now hear a series of echoes of each sound that you play. The
FEEDBACK
control creates the series of echoes by mixing a portion
of the delayed signal with the signal from your instrument. When the
FEEDBACK
control is set to about 8, the echoes sustain indefinitely.
With the FEEDBACK control above 8, the echoes build up chaotically
into some amazing electronic textures.
In the next sections we'll explain how an analog delay works and
look at your MF-104Z in more detail. For now, get a feel for your MF-
104Z's controls by experimenting with different settings.