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Triggering/Cycling the Envelope

1.

Cycle Button

— Press the button to toggle Cycle mode on/off. When this button is lit up, the envelope

will be free-running. In Cycle mode, the envelope will start on the ping clock (unless you gave an Async
trigger, see below... Pressing this button after an Async pulse will make the envelope re-sync.) As soon
as the button is pressed, the PEG calculates where in its cycle the envelope should be so that it ends on
the next ping clock, and starts outputting the envelope from this point. S

ee Figure 3.

2.

QNT jack (Quantized)

—

Apply a trigger/gate to this jack to cause an envelope to start

on the next

ping clock

. The PEG will wait for the next ping clock and then start the envelope. Holding a gate high

on this jack causes the envelope to repeat.

See Figure 4.

The rising edge of a trigger on this jack will

cause the envelope to re-sync if an Async pulse has previously been applied. The envelope will
complete at least one entire cycle even if the QNT jack goes low mid-way through the envelope.

3.

Async jack (Asynchronous)

— Apply a trigger/gate to this jack to cause an envelope to start

immediately.

Holding a gate high will cause the envelope to sustain as long as the gate it high, and then

start the fall curve once the gate is released (A-S-R envelope).

See Figure 5

4.

"T" jack (Cycle Toggle)

— When a gate is appled to this jack, both channel's Cycle buttons will toggle

state (on->off and off->on). When the gate is released they will revert to their previous state. The "T" jack
is useful for toggling between the two channels: set one channel in Cycle mode and the other channel to
non-cycling, and take the output from the OR jack (see Outputs section below). The "T" jack is also
useful for turning both channels on/off at the same time.

Note: applying a gate to the "T" jack is the

same as pressing both Cycle buttons at the same time (whether pressing the button turns it on or off).
Thus, all features that apply to starting Cycle mode also apply to turning the Cycle button on using the
"T" jack.

Figure 3: Pressing Cycle button

When button is pressed, envelope starts outputting
instantly, from a point in its cycle such that it's in sync
with the divided ping clock. (Blue trace is cycle button)

Figure 4: Quantized QNT trigger

Applying a QNT trigger causes an envelope to output
at the next ping clock (ping clock not shown in figure).
Holding a gate high causes the envelope to repeat.

Figure 5: Asynchronous trigger

Trigger causes an envelope to output immediately
(rising edge of trigger). Holding a high gate causes a
sustain period, and a fall period to begin after gate
goes low (ASR envelope). Envelope is re-triggerable.

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Содержание PEG

Страница 1: ...rator whose envelope lengths are set by incoming clocks or pings The PEG has full CV control of envelope shape skew and ping clock division multiplication as well as a plethora of triggering and cycling options AD AR quantization cycle cycle toggle and a tap tempo button for each channel DOWNLOAD UPDATED MANUAL AT http 4mspedals com peg php ...

Страница 2: ...goes high when envelope finishes a fall portion and goes low when envelope begins a fall portion Half R Half Rise gate goes high when 50 of the time of the rise portion has elapsed and goes low after 50 of the time of the fall portion this is different than a voltage comparator based design Jumper for each channel changes EOR output to a Half Rise gate output Factory setting is EOR for red channel...

Страница 3: ...s a clock output from an RCD SCM Step 4 Adjust your output level Adjust the Scale knob and or play with the Bi polar button to get a good voltage range that works well with whatever you re modulating with the PEG That s the basic PEG patch Ping Trigger and Output Now we can play with the parameters of the envelope Step 5 Set up your Division Multiplication amount Turn the Ping Div Mult knob to var...

Страница 4: ... clear an externally generated ping if the external unit has stopped sending pulses 2 External Clock plug a clock or manual trigger module into the Ping jack Only the timing between the last two pulses is used to set the ping clock timing no averaging Therefore you can plug in a manual trigger gate module such as the Pressure Points and just tap in two pulses the ping clock will continue to run at...

Страница 5: ...k will force an update of the div mult amount immediately in the middle of a curve if necessary If you hold a gate high on the QNT jack the div mult amount will track the CV glitchy envelope shapes can be obtained this way See Figure 1B When the Div Mult amount changes the PEG has to compensate the envelope in order to maintain timing A partial envelope may be generated after the div mult amount c...

Страница 6: ...n start the fall curve once the gate is released A S R envelope See Figure 5 4 T jack Cycle Toggle When a gate is appled to this jack both channel s Cycle buttons will toggle state on off and off on When the gate is released they will revert to their previous state The T jack is useful for toggling between the two channels set one channel in Cycle mode and the other channel to non cycling and take...

Страница 7: ...inear rise linear fall or asymmetrical e g exp rise log fall See figures 8a 8d The curve is selected from one of 17 using the Curve knob and CV jack the knob sets the offset for any applied CV As you turn the knob clockwise the first 4 curves are asymmetrical with exponential attacks and varying decays The last 4 curves are asymmetrical with logarithmic attacks and varying decays The middle 9 curv...

Страница 8: ...pot One common use would be to set this to about 10V of level shift so that the output when Scale is inverting would be positive voltages but with an inverted waveshape This is useful because now the 5V ENV jack and main ENV jacks will produce inverted copies of the same waveshape but in the same voltage range The main output is the ENV output and its amplitude is controlled by the Scale knob and ...

Страница 9: ... has elapsed It goes low when 50 of the fall time has elapsed It is high during a sustain segment and stays low when the envelope is not running While the Curve and Scale parameters have no effect on the gate outputs Skew has a big effect Skew changes the pulse width of EOF and EOR Turning Skew to the right more CV creates longer EOR pulses and shorter EOF pulses To the left we get shorter EOR and...

Страница 10: ...steps 1 7 to 0V output and step 8 to 5V If you want to control the number of times the note repeats e g 8 times as fast but only hit 4 times you can use a sequencer with variable pulse width for its gate output patched into the QNT jack or another module to change the pulse width e g Seq Gate SCM In and SCM x1 PEG QNT playing with SCM s PW knob Self oscillation self patched Very chaotic interestin...

Страница 11: ...y way Clock both channels with the same clock and patch the blue channel Half R into red channel Async Turn blue Cycle on and red Cycle off Adjusting the Skew of the blue channel will change the amount of phase shift from 0 180 50 skew will be 90 Note If you set red Skew to more than 50 this technique will result in a trapezoidal waveform which may not be desired To overcome this turn the red chan...

Страница 12: ...with 5V Source jumper selecting external 5V 105mA max with 5V Source jumper selecting internal 5V 5V rail 40mA max with 5V Source jumper selecting external 5V not used with 5V Source jumper selecting internal 5V 12V rail 35mA max Page 12 ...

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