Moog Music MF-104M Analog Delay User Manual

Page 10

LFO RATE - Sets the frequency of modulation of the Delay Line by the
LFO. The

RATE can be varied from .05 Hz to about 50 Hz. The LFO RATE

LED indicates both the

RATE and WAVEFORM of the current LFO settings.

The LED is red when the

RATE is set from the front panel, green when the

rate is set by the

TAP TEMPO switch, and orange when the LFO is synced

to MIDI clock. When synced to MIDI clock, the

RATE control is quantized to

select only rhythmic subdivisions of the MIDI clock tempo.

LFO AMOUNT - Sets the overall amount of modulation of the Delay Line
by the LFO.

Note: As the LFO Amount increases, the functional range of the DELAY TIME control
is decreased, so that the maximum and minimum delay times are not exceeded

BYPASS - Used to turn the effect ON and OFF. When the effect is on the
Bypass LED is green. When the effect is in

SPILLOVER mode the BYPASS

LED is orange. When the effect is off the

BYPASS LED is red.

TAP TEMPO - Dedicated switch used for setting the DELAY TIME or the
LFO RATE to a musical tempo.

To initiate Tap Tempo control of the

DELAY TIME, press the TAP TEMPO

switch three times with the tempo you want (quarter notes). On the third
press, the

TIME LED will change to Green, and the DELAY TIME will change

rates to match the timing of the switch presses.

If you continue to press the

TAP TEMPO switch, the TIME will be set by a

running average of the time between switch presses. To start over, wait
five seconds and then press the

TAP TEMPO switch three times to set a

new tempo.

To revert the unit to front panel control, simply turn the

TIME control. The

TIME LED will turn red, and the DELAY TIME will set by the panel control.

To initiate Tap Tempo control of the LFO, press and hold the

TAP TEMPO

switch for at least one second. The LFO LED will flash green to show that
the tap tempo is now routed to the LFO and not the

DELAY TIME. To

change back, press and hold the

TAP TEMPO switch again until the TIME

indicator flashes green.

When Tap Tempo is routed to the LFO pressing the switch three times or
more will set the LFO rate to match the tap time. Turning the

RATE knob

reverts the unit back to front panel control.

Note: When either destination (time or LFO) is synchronized to MIDI Clock messages,
Tap Tempo is disabled for that destination only

OUTPUT LEVEL - Sets the strength of the Analog Delay output at the
MIX OUT and DELAY OUT jacks. This control is only active when the effect
is on or in Spillover mode. The

OUTPUT LEVEL control is designed so that

an overall boost, attenuation or zero gain state can be achieved with any
DRIVE setting.

MIX - Sets the ratio of dry (signal as input) to wet (effected) signal. This
control is only active when the effect is on. Set fully counterclockwise it
allows only the dry signal to pass to the

MIX output. The full clockwise

position allows only the wet signal to pass to the

MIX output. Any position

between the two will blend wet and dry signal to the output. The

DELAY

OUT signal is not affected by the MIX control.

Note: If you’re applying a sustained steady pitch to the MF-104M and the MIX control
is set near 12:00, you may find that the direct and delayed signals alternately reinforce
and cancel each other in rapid succession as the DELAY TIME is varied. This is a nor-
mal result of mixing a steady pitch with a delayed replica of itself. It is the analog-
delay equivalent of “standing waves” in a reverberant room.

DELAY TIME - Sets the length of delay from the BBD Delay Line based
on the

SHORT/LONG (Delay Range) switch setting. In SHORT mode, with

AMOUNT set to 0, the delay time changes from approximately 40ms to
400ms nominal. In

LONG mode the available span is from approximately

80ms to 800ms nominal. The

DELAY TIME is modulated via the LFO to

create various effects.

Since the delay’s internal anti-alias filter must change for the delay time,
the

SHORT setting will yield a higher frequency response for the same delay

time as

LONG. Switching from SHORT to LONG will reduce the sound in

the “feedback loop” one octave, while switching the other direction will
double the pitch and time of the loop sound.

FEEDBACK - Sets the amount of Delay Line output fed back into the input
of the Bucket Brigade Device. The feedback is variable from off, slapback
or single repeats, to continuous repeats (at about the 3:00 setting). When
turned past 3:00, the

FEEDBACK provides for self-oscillation and swelling

delay sounds.

WARNING: The Analog Delay Feedback control is able to drive the Delay Line into
self-oscillation. This means the Analog Delay is capable of producing sounds without
any audio signal present. Tones produced by self-oscillating feedback may be much
stronger than normal signal levels. Please watch your speakers and ears. Oscillation
typically begins at the 3:00 position.

LFO WAVEFORM - Selects the LFO waveform for modulation of the Delay
Time. There are six waveforms available: Sine, Triangle, Square, Sawtooth,
Ramp and Sample and Hold (Random Stepped) waveforms.

Note: No modulation will be heard with the LFO AMOUNT set to zero.