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4ms PEG Скачать руководство пользователя страница 8

Envelope Outputs (Main ENV, +5V ENV, OR)

Each side of the PEG has two outputs: a scaled output labeled "ENV" and an unscaled output labeled "+5V
ENV". Additionally, there is a shared output that's the arithmetic "OR" of the scaled outputs.

•

The Scale knob and Bi-polar button only effect the ENV output jack:

◦

With Bi-polar off: If the scale knob is right of center, the output will be positive-only, from 0V to a
maximum of +10V. Left of center, the envelope inverts and is negative-only, from 0V to a minimum of
-10V.

◦

With Bi-polar on: Scale knob right of center, the output will rise from negative to positive, then fall
back to negative voltage (maximum range -5V to +5V). Scale knob left of center, the output starts
positive and "rises" to negative voltage, then "falls" back to positive voltage.

◦

In any setting, Scale knob in the center will produce no output.

◦

The Bi-Polar button is a level-shifter (before the scale inversion/attenuation in the circuit). The
amount of level-shifting is controlled by a trim pot on the back of the module. Factory setting is a
shift of -5V (thus 0V to +10V becomes -5V to +5V), but other levels may be obtained by turning this
trim 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 Bi-polar button

•

The +5V ENV jack always outputs a waveform that goes from 0V to +5V. The scale and bi-polar controls
have no effect on this. This jack is useful as an auxiliary envelope output. It's often useful to patch into
the other channel's CV jack(s) to modulate parameters.

•

The OR jack will output the highest voltage value from either side's ENV jack at any given moment. One
way to use this is to think of the OR jack as a mix out, and use the Scale knobs as level knobs and the
Bi-Polar buttons to bring down the relative level of a channel (kind of like a mute button). See Fig 9c.

Figure 9a: Changing Scale (Bi-polar off)

Figure 9b: Changing Scale (Bi-polar on)

Top traces are ENV as Scale is turned from max to min. Bottom traces are +5V ENV. Grid lines are 5V/division.

Figure 9c: OR jack vs. adding ENV outputs

Top trace is OR jack (one channel is being sped up).
Bottom trace is from mixing both channels using a
passive mult

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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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