AJH Synth MiniMod Glide & Noise User Manual
Page 3
8 Glide Mode :
This three way switch selects the Glide mode. In the centre position Glide is active on both
rising and falling input voltages. With the switch in the “up” position the glide effect is only
active on rising input voltages, it will drop instantly and track falling input voltages. With the
switch set to “down” the opposite is true, the module will glide down at the rate set on by
the Glide speed control, but will rise instantly and track rising input voltages.
9 Glide CV Output:
This is the Glide CV Output from the Glide Module. It has an output impedance of approxi-
mately 500 Ohms and the voltage output will be in the range of 0 to +6 Volts.
Notes on using longer glide times:
The original Model D keyboard glide circuit only had an effective range of four octaves, however by careful selection
of components we have managed to increase this range to 6 octaves (0 to +6 Volts) for short and medium length
glides, and 5 octaves (+1volt to +6Volt) for long duration glides.
So, if very slow glides are used (four seconds or longer) then take care to keep the Glide CV Input voltage between +1
Volt and +6 Volts. If the input voltage goes down to zero the output it will not glide right down to zero but instead
will level out somewhere between 0 and 1 volt, dependent upon the Glide Speed setting.
6 Hold CV Input :
A Gate Contol Voltage (Of +2 Volts to +10 Volts) applied to this input turns on the Glide
effect. If the gate voltage is zero (Low) then “Hold” mode is active and the Glide Output is
held at the last voltage received irrespective of changes to the Glide CV Input.
If no patch lead is connected to this Input then the Hold action is controlled by
the“normalising” function through the jack socket switch contact. In this case the
onboard jumper (JP1) comes into play. If the jumper is set to the “On” position then the
Glide function will be permanently active. If the jumper is set to the “Bus” position then
the module responds to Gate signals over the Power Distribution Bus. So for example if a
Midi/CV converter is connected then Glide mode will be active when a key is depressed
and hold mode will be active when all keys are released.
7 Glide Speed :
This controls the slew speed of the glide effect. Turning the control clockwise slows down
the Glide (or slew) rate. One of the “features” of the original Model D glide circuit is that it
is asymmetric - it glides up considerably faster than it glides down and we have emulated
this behaviour.