Moog Music MF-104Z Analog Delay User Manual

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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.