The PITCH-HOLD capability permits you to hold the synthesizer envelope generator parameters and, along
pitch control voltages from the FF-1 constant while with the INTERVAL and PITCH-HOLD, for creating
the pitch of the input signal may be changing . The a duet effect between the instrument you are playing
PITCH-HOLD is activated with a footswitch as well . and the synthesizer which is controlled by the Fre-
During PITCH-HOLD, the GATE and ENVELOPE quency Follower .
OUTPUTS continue to respond to the input signal .
As you can see, the FF-1 Frequency Follower does it
The MUTE function gives you the ability to inhibit all! Imagine the thrill of hearing a synthesizer respond
the gate and envelope outputs of the FF-1 during a to all the subtle facets of a guitar tone, the moody
performance without removing any plugs. The MUTE personality of a saxaphone, or the incomparably
is engaged with a footswitch also . articul'ate human voice. You know that the weakest
part of a synthesizer is its keyboard -- that the key-
Still another footswitch operated function is the board can only provide a pale reflection of your
GATE . The GATE simply causes a gate voltage at musical concepts to control the synthesizer . Key-
the GATE OUTPUT jack regardless of the input boards were invented for instruments that can't
signal level . This feature is useful for setting up the "sing"! The FF-1 brings the synthesizer to your
world of warm, responsive musical sound.
JACKS :
INPUTS : REMOTES : (provide a means of connecting remote
controls such as footswitches to activate special
SIGNAL : accepts the signal from the instrument you performance features of the FF-1)
will use to control the synthesizer . The outputs of
many instrument pick-ups, some microphones, and GATE : causes the gate outputs of the FREQUENCY
all line level sources may be applied to the SIGNAL FOLLOWER to activate the synthesizer envelope
INPUT JACK . generators regardless of the input signal .
AUTO-LOCK : accepts any waveshape output of a INTERVAL : engages the interval tuned with the
VCO in the synthesizer being controlled by the FF-1 . INTERVAL control .
This VCO signal is compared to the input signal by
the AUTO-LOCK circuit. Based on this comparison, PITCH-HOLD : causes the FF-1 to retain the pitch
the AUTO-LOCK corrects the pitch control output control voltage at the time the switch is closed and
of the FF-1 to cause the VCO to exactly match the to ignore any new pitch information until the switch
pitch of the input signal . is opened again.
CONTROLS :
INPUT LEVEL : controls the audio signal input level AUTO LOCK switch : engages the AUTO LOCK
to the frequency and envelope followers over a gain feature if a signal has been applied to the AUTO
range of 0.1 to 10 . This control allows you to opti- LOCK INPUT jack .
mize the FF-1 performance for a specific input signal .
GATE THRESHOLD: adjusts the sensitivity of the
TUNE : adjusts the frequency control outputs of the gate producing circuit relative to the loudness of the
FF-1 so that the VCO's which it is controlling may be
input signal . This control is normally used after the
tuned to the input signal . This control has a range of optimum input level has been set with the INPUT
more than two octaves. LEVEL control.
INTERVAL : determines the musical interval size that ENVELOPE LEVEL : controls the range of the enve-
is selected by the remote INTERVAL SELECT lope follower output so that the envelope control
switch . This control has a range of more than two voltage will match the control requirement of vir-
octaves centered on whatever pitch the TUNE control tually any VCA . .
has been set for.
MUTE : inhibits all outputs of the FF-1 to provide a V GATE : a command signal of the positive going
fast and effective means of turning the unit on and type, used to turn most synthesizer envelope genera-
off during performance . tors on and off in response to the presence of the
input signal .
OUTPUTS:
S GATE : occurs simultaneously with the V Gate,
LOG PITCH : the control voltage output used to drive this switching or shorting type gate is required to
the pitch of a conventional exponentially responding control the envelope generators of certain manu-
synthesizer VCO (1 V per octave) . facturers.
LIN PITCH : the control voltage output used to ENVELOPE : the control voltage output of the
control the pitch of a linearly responding VCO (1V Envelope Follower which is used to control a VCA
per 1 KHz) . to create the same loudness contour as the input
signal .
MODEL FF-1 FREQUENCY FOLLOWER
FS-1 Foot Switch (Included) Rack Mounting Brackets Are Removable .
SPECIFICATIONS
LEADING PARTICULARS: REMOTE SWITCH JACKS:
Acquisition Time 20 Milliseconds All remote functions are "enabled" by shorting Pin 1 to Pin 2
Frequency Range 80 Hz to 5 KHz of the remote switch jacks.
Pitch Accuracy Log . 0 .1% to 2 .5 KHz
0 .2% to 5 KHz POWER REQUIREMENTS :
Lin . 1 .0% to 2 .5 KHz
2 .5%to5KHz 105 to 125 Volts
50 to 60 Hz
SIGNAL INPUT : 60 Watts Max .
Waveform Required Any DIMENSIONS :
Input Level (useable range) -45 to +35 dBM
Dynamic Range 40 dB Width x Depth x Height 17 .0 x 13 .5 x 3 .5 inches
(rack mount brackets provide
AUTO-LOCK INPUT : standard 19 in . width)
Depth behind panel 12 .75 inches
Waveform Required Any
Input Level (useable range) -20 to +20 dBM EIGHT :
Capture Range 1 Semitone
8 I bs .
CONTROL RANGES :
WA1 CCESSORIES :
INPUT LEVEL control From 10X attenuation to
10X gain FS-1 Footswitch
TUNE control 2'/z Octaves Total (+1'/a and 2 Rack Mounting Brackets and
-1 % ) Hardware
INTERVAL control 2'/z Octaves Total (+1'/a and 1 S-trig Adapter Patch Cord
-1'/0) 2 Standard Patch Cords
GATE THRESHOLD 25 mV to 2 .5 Volts RMS* 1 Operator's Manual
control
ENVELOPELEVEL 0 to 2X input envelope
control amplitude
*With input level control at "0" .
OUTPUTS : OPTIONAL ACCESSORIES :
Log Control Voltage 1 Volt/Octave from -2 .70 to Additional FS-1 Footswitches
+3 .35V with 0 VDC at Patch Cords in lengths of from 1 to 5 feet
500 Hz Series 2000 Synthesizer modules and systems to create the
Lin Control Voltage 1 Volt/KHz from -2 .40 V to finest electronic sounds available today
-2 .45 V with 0 VDC at
2 .5 KHz
V-Gate On = +15 Volts, Off = 0 Volts
S-Gate On = Ground, Off = Open
Circuit
Envelope Positive going DC control
voltage proportional to the
amplitude of the input signal,
variable gain from 0 to 2X
the input signal envelope
amplitude .
PoLyrasiorl 60 Sugg Road
Buffalo, New York 14225
(716) 631-3790
