Further, a +5V DC oltage ( ia 10kΩ resistor) is pro ided on , a ailable on the middle connector
of a 3pole jack plugged in . Thus may be useful, for example, in combination with a sensor or a
pedal. In the latter case, a common passi e foot pedal (e.g. the Moog ‚EP-3‘) with 3pole jack
should work.
When using the Sample+Hold (switch 'S+H'
in middle or lower position), the external
signal will replace the en elope follower's
oltage and this external signal in
combination with the LFO will be processed
by the Sample+Hold (please read the
referring point ).
S+H Sample+Hold switch
Alternati ely to the modulation with the en elope shape (with switch in upper position 'off'), a
Sample+Hold circuit can be acti ated for frequency modulation (switch in middle or lower
position).
A Sample+Hold is ha ing two inputs, an analog oltage input and a clock input, and an output
pro iding the generated Sample+Hold oltage. Each time when the clock signal is acti ating the
S+H, the S+H is reading the momentary oltage from its analog input and holds it until the next
clock impulse is coming. The results are staircase- or glissando-like sound patterns, if the S+H is
used for frequency modulation. The XR1-E's Sample+Hold is using the internal LFO and the
en elope follower (with a threshold function) for sourcing the S+H inputs. The switch 'S+H'
determines if the S+H is acti e, and whether the LFO is pro iding the clock signal and the
en elope shape is the analog input of the S+H, or ice ersa.
•
Upper position
Off: The S+H function is switched off, for en elope modulation.
•
Middle position
LFO-Clk: The squarewa e signal of the LFO is the clock of the S+H and the
en elope shape is its analog input.
•
Lower position
En .-Clk: The en elope shape con erted to a trigger signal (from a certain
le el of the en elope shape) is the S+H's clock and the trianglewa e of the LFO is going to
its analog input.
When using the external frequency control input , the en elope follower’s signal will be replaced
by that.
Switch
'S+H'
in middle position
The LFO's squarewa e
output is the S+H's clock
signal
The en elope shape is the
S+H's analog input
The resulting frequency
modulation oltage
6
