PEG Manual - Analogue Haven
Contents
1. with the divided ping clock Blue trace is cycle button Holding a gate high causes the envelope to repeat Page 6 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 Skew Skew is the ratio between the rise and fall times Unlike most envelope generators in the PEG the total envelope length is held constant when the skew is changed thus allowing you to change between ramp up ramp down triangle and everything in between without altering the timing AAN Figure 6 Skew examples Skew knob was turned up a little bit in between each envelope If Skew is changed while an envelope is running the curve will update immediately Some funky outputs can result from this see figure for examples F Figure 7 Funky envelopes made by twiddling the skew parameter while envelope is running Curve The envelope shapes available in the PEG are formed by combinations of exponential linear and logarithmic waveforms In between each fully expo lin log waveform there are three interpolated waveforms formed from weighted combinations of each e g 25 log 75 linear The waveforms can be symmetrical e g linear rise amp linear fall or asymmetrical e g exp rise amp log fall See figures 8a 8d The curve is selected from one2. 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 Page 8 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 Gate Outputs EOR EOF Half Rise Each channel has a two gate outputs End of Fall EOF and either End of Rise EOR or Half Rise A jumper selects the latter see photos below for location of jumpers e End of Rise outputs a gate that goes high when the fall segment begins and goes low when the envelope completes It is low during a sustain segment The jack will stay low when the envelope is not running Another name for this jack might be Envelope is Falling See figure 10a e End of Fall outputs a gate that goes high when the fall segment ends and goes low when a rise segment ends It is low during a sustain segment It will stay high when the envelope is not running Another name for this jack might be Envelope is Rising or Resting See figure 10b e Half Rise outputs
3. Set your Ping time Before the PEG can generate an envelope you need to supply a Ping time The Ping time is the basic reference that determines the timing of the envelope e Tap the red channel Ping button two or three times about a second between taps It s easier to see what s going on with a slow envelope The white Ping button should be flashing at the tempo you tapped If you gave a third tap the time between the taps will be averaged unless the third tap occurs more than 50 different than the timing period of the first two taps e You also could run an external clock into the red Ping jack when a gate is received on the Ping jack the internal tap tempo clock is stopped Step 3 Provide a trigger source Like any envelope module the PEG will produce an envelope when it receives a trigger Also like many envelope modules it can be set to self trigger so that it ll cycle without any external trigger e Press the red channel Cycle button it will light up green Notice the white LED above the ENV jack starts flashing The envelope is now running freely in time with the ping clock Adjust the other module s you are running the PEG into so you can hear the modulation e You also could turn Cycle off and run a manual trigger into the QNT or Async jack e g try the Gate output from a Pressure Points or perhaps a clock output from an RCD SCM Step 4 Adjust your output level e Adjust the Scale knob and or play with the Bi polar
4. applied e QNT jack for each channel triggers an envelope to start at the next quantized beat with respect to the divided multiplied ping clock Holding a gate high on this jack causes the envelope to repeat e Async jack for each channel causes an envelope to output immediately asynchronously Holding a gate high results in an AR envelope rise sustain fall If cycle mode is enabled the envelope will continue to cycle at this new phase with respect to the ping clock Phase can be reset to being in sync with the ping clock by pressing the cycle button or applying a pulse to the QNT jack e CV input jacks e CV control of each channel s Ping Div Mult Skew and Curve using the CV jacks e Respective knobs set the center offset for the applied CV e CV of 0 10V will modulate the parameter s full range however a 0 5V CV will modulate the parameter within a useful range Dimensions e 20 HP Eurorack format module e 1 6 40mm deep Page 2 Your first P E G Patch a Basic Walkthrough Step 1 Prepare the PEG e Unplug all cables from the PEG turn the Div Mult Skew and Curve knobs to center 12 o clock turn Scale all the way up and make sure the Cycle and Bi polar are off not lit up e Plug the ENV jack on the red channel into something you want to modulate perhaps a filter or the pitch of an oscillator Choose something simple so you can hear what s going on while you re learning about the PEG Step 2
5. 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 e Turn the Ping Div Mult knob to various settings and watch the Ping button flash faster and slower Notice how the tempo doesn t change gradually but instead jumps from speed to speed This is because each speed is an integer multiple or division of the original tempo e g three times as fast or half as slow e You also can modulate this parameter with the Div CV jack at the bottom Step 6 Adjust Skew and Curve e Fiddle with the Skew and Curve knobs to get an envelope shape you like Notice the curve shapes in the center section of the knob are all symmetrical Same rise and fall shape while the shapes at the start and end of the knob s range are asymmetrical different curves for rise and fall Of course you can modulate these parameters with the CV jacks at the bottom Step 7 Trigger the blue channel with the red channel e Now plug the red EOF end of fall jack into the blue Ping jack e Turn the blue channel Cycle button On e Run the blue channel ENV jack output to modulate something else Set Scale and Bi polar as desired Step 8 Modulate the blue channel with the red channel e Make sure the blue Ping Div Mult knob is set to and patch the red 5V ENV jack into the
6. changes in order to insure that subsequent envelopes are synced to the ping clock See Figure 2 Figure 1A Changing Div Mult with no gate on QNT Figure 1B Changing Div Mult while holding a gate Notice the envelopes always start on the ping clock s high on QNT rising edge Slope of envelope changes each time the Div Mult Page 5 CV knob moves to a new div amount Figure 2 Changing Div Mult causes catchup partial envelope Change occurred from x4 to 4 in the middle of second high portion of the ping clock New envelope re syncs abruptly on the following ping clock 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 See Figure 3 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 r
7. max 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
8. this technique will result in a trapezoidal waveform which may not be desired To overcome this turn the red channel to Cycle mode wait for one cycle then unplug the Half Rise gt Async patch cable Another way to overcome this is to run the Half R output through a trigger to gate module before going into Async Another way just for kicks Clock both channels together and set both to 4 Using the same technique as described in the Quantized phase selection patch above hit the Cycle button at the right moment so that one channel is 90 degrees out of phase as the other Or turn blue Skew one mark to the right of center turn red Cycle off wait for red envelope to finish wait for the blue Half R LED to go off and immediately patch blue Half R into red QNT The two channels will be 90 degrees out of phase Now adjust the levels Turn both Scale knobs to Invert about 10 00 and both Bi polar buttons on Run the main ENV outputs into a Level Shifter e b Bubblesound LvL rm or Doepfer A 129 3 to add about 2 5V so that the inverted signals are at the same DC offset as the 5V ENV outputs Your four phase shifted outputs will be Blue 5V ENV 0 Red 5V ENV 90 Blue level shifted ENV 180 Red level shifted ENV 270 If you use this patch often and want to avoid using an external level shifter module you can adjust the Bi Polar trim pot Page 11 as described in the Bi Polar section above Power consumption 12V rail 60mA
9. 10V non inverted and Minimum 10V to OV inverted e Bi polar button centers main envelope output around OV 5V to 5V output e 5V ENV jack is a non scaling output that always produces a OV to 5V envelope regardless of Scale and Bi polar settings e OR jack outputs an analog OR of the two channels scaled envelope curves This outputs the highest value from either envelope at any given moment taking into account the Scale and Bi polar controls e Gate outputs e End of Rise EOR gate output goes high when envelope finishes a rise portion and goes low when envelope begins a rise portion e End of Fall EOF gate output goes high when envelope finishes a fall portion and goes low when envelope begins a fall portion e 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 Half Rise for blue channel This jack provides a 90 degree out of phase gate output useful for quadrature effects clock phase shifting and trigger delay effects e Triggering cycling e Cycle button for each channel forces envelope to self cycle LFO mode in sync to the ping clock Button lights up when in cycle mode e T jack toggles the state of both channels Cycle buttons while a gate is
10. 4ms Pingable Envelope Generator Eurorack Module User Manual v2011 11 25 The Pingable Envelope Generator PEG from 4ms is a dual envelope generator 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 Features e Basics e Dual pingable envelope generator total envelope time is set by a minimum of two pulses ping e Tap tempo button or external clock triggers sets the ping time e Two taps will set the tempo If a third tap is given close to the tempo to the first two taps the two timing periods will be averaged e Envelope time is a multiple or division of the ping clock from 8 to x8 set by Ping Div Mult knob and CV e Curve knob and CV control the shape of the output envelope various combinations of exponential linear logarithmic and interpolated curves are available separately for rise and fall portions e Skew knob and CV control the ratio between rise and fall times without changing total envelope time e Envelope is triggered by Quantized trigger jack Asynchronous trigger jack and or Cycle mode e Outputs and scaling shifting e Scale knob is an attenuating inverter for main envelope output Maximum OV to
11. a gate that goes high when 50 of the envelope s rise time 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 e While the Curve and Scale parameters have no effect on the gate outputs Skew has a big effect o 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 longer EOF pulses o The width of the Half R pulse is always 50 of the envelope time Changing the Skew will change the phase of the Half R output See figure 10c jumper for EOR Factory setting is removed jumper for EOR Blue channel Half Rise jumper installed Remove Factory setting is installed Figure 10a End of Rise EOR aka Is Falling Figure 10b End of Fall EOF aka Is Rising or Resting Figure 10c Phase shifting Half R Yellow trace is EOF Blue is Half R Skew knob being turned slowly Notice the phase shift from 180 to almost 0 degrees relative to the rising edges Page 9 Beyond Mere Envelopes Advanced PEG Patching Hopefully after reading this manual and playing with your PEG you have a clear understanding of how to make a variety of timing dependent envelopes The following patches illustrate how the PEG s large assortment of inputs and output types can be used for a variety of purposes besides enve
12. blue channel s Div CV jack Set the red channel Div Mult knob to something slow The blue channel should speed up slow down in time with the red channel s envelope Keep going play with the T jack try clocking both channels the same and hitting different triggers into the QNT jacks play with off time triggers into the Async jack while the channel is in Cycle mode modulate each channel with the other or themselves etc etc Have fun Page 3 Ping and Tap Tempo Ping is the core of the PEG every aspect of the envelope relates back to the timing established by the ping time There are two ways to set the ping time 1 Tap tempo button tap the white Ping button at least twice to set the timing o It s easiest to tap a tempo with Ping Div Mult set to This is because the tap tempo clock can be divided multiplied just like the external Ping clock For example if you tap a tempo with the Ping Div Mult knob set to x4 the Ping light will flash four times as fast as you tapped o Three taps will average Two taps set the ping timing period If you give a third tap it will be averaged with the first two taps unless the timing period set by the third tap is widely different than the first two taps specifically it must be more than half and less than twice the timing period set by the first two taps o When a gate is received on the Ping jack the tap tempo clock is disabled Try tapping a fast tempo while you have a
13. e 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 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 T jack Cycle Toggle When a gate is appled to this jack both channel s Cycle buttons will toggle state on gt off and off gt 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 Figure 4 Quantized QNT trigger When button is pressed envelope starts outputting Applying a QNT trigger causes an envelope to output instantly from a point in its cycle such that it s in sync at the next ping clock ping clock not shown in figure
14. ined by a clock a trigger is outputted Patch a trigger e g from Pressure Points gate output to the Async jack Patch a clock into the PING jack Set Div Mult to 2 Set Skew to center EOR will be your delayed trigger output actually is a gate as wide as the clock period Changing Skew will fine tune the delay time as well as output gate pulse width Audio Harmonizer Sub octave and harmonic series from an audio input Run an oscillator into Ping input Cycle On Set your frequency shift amount with the Div Mult e g x2 will be an octave up x3 will be an octave plus a fifth 8 will be three octaves down etc Audio output from the ENV jack Scale sets your volume Skew and Curve set your waveshape timbre Keying Async will mute the signal Turning Cycle off and keying QNT will gate the signal Do this on both channels and use the T jack to toggle between harmonics taking the output from the OR jack Unplug one channel s Ping to let it slowly drift creating phaser swooshing sounds Run into a LPF with roll off at 10kKHz for a less harsh sound Page 10 Phase Shifting Variable phase shift two sets of events are repeatedly occurring at the same intervals but the amount of stagger between them is variable Ping both sides with the same clock Cycle on both channels Main envelope outputs to open two different filters or LPG s or somehow make sound Some options for setting the amount of phase difference Manual
15. lopes Complex pattern generator Use the PEG s quantization features to create complicated repeating beat patterns For this patch it s helpful to have a metronome or kick in the background being triggered at the steady master clock rate or slow division of the master clock Run a Shuffling Clock Multiplier x8 output or RCD 1 out into Ping Run another SCM output say S5 or RCD 3 into QNT Cycle Off Div Mult to Run the ENV output to open a filter try a 100 Skew triangle Curve If the beat pattern isn t goovy use a different clock output into QNT use the SCM s slip shuffle and adjust Div Mult To increase complexity run EOF into the other channel s Ping Turn that channel s Cycle on or run a different clock into QNT Play with Div Mult Use the OR out or run its ENV out to modulate another sound or perhaps a second aspect of the same sound If you can play with the pulse width of the module feeding QNT jacks the SCM Breakout has a PW knob and jack as do many VCOs and LFOs Longer PW means more repeated notes Ratcheted quantized beats Control the repeat rate of each note of a sequenced bassline Clock a sequencer and run the same clock into Ping Presumably one CV output from the sequencer is controlling the pitch of your bassline Patch a different CV output of the sequencer into Div CV Turn Cycle on or run the sequencer s Gate output into the QNT jack Set each step to a CV value that corresponds to the n
16. 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 curves are symmetrical ranging from exponential to linear to logarithmic Look closely at the artwork around the Curve knob on your PEG to see how the curves are laid out Once a rise or fall segment has begun the shape will not change until the segment ends However applying a pulse on the QNT jack or turning the cycle button on will force an update of the curve shape As opposed to the Div Mult parameter holding the QNT jack high will not force the Curve shape to track the CV Figure 8a Curves 1 5 Figure 8b Curves 5 9 Asymmetrical curves with expo attacks Symmetrical curves expo to linear _ be Figure 8c Curves 9 13 Figure 8d Curves 13 17 Symmetrical curves linear to log Asymmetrical curves with log attacks Page 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 e The Scale knob and Bi polar button only effect the ENV output jack O With Bi polar off If the scale knob is right of center the output will be positive only f
17. rom OV to a maximum of 10V Left of center the envelope inverts and is negative only from OV 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 OV 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 e The main output is the ENV output and its amplitude is controlled by the Scale knob and Bi polar button e The 5V ENV jack always outputs a waveform that goes from OV 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 e The
18. slow clock going into the Ping jack the fast tempo will take effect immediately but will revert back to the slow tempo when a gate is received o Hold the Ping button down for 2 seconds to clear the tempo The light will go off and the envelope will stop You also can 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 o Only the timing between the ast 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 that tempo even though you re not providing any more trigger pulses o Tip A quick way to keep both channels in sync is to mult stack an incoming clock in both Ping jacks Alternatively you can use a clock module with multiple outputs such as the Rotating Clock Divider or Shuffling Clock Multiplier Or you can patch the EOF of one into the other o The Ping jack has no roll off but the main chip can process incoming clocks up to about 10KHz However it can only output cleanly up to about 1kKHz depending on your requirements for cleanly So you can divide a 10kHz clock down to 1 25kHz but it will be dirty When outputting frequencies higher than 1kHz the output will be unstable noisy and glitchy but responsive to the input frequency See Self oscillation sample pa
19. tch Below the 1kHz threshold the PEG can be used as a rudimentary harmonizer e g sub octave generator See Audio Harmonizer patch The maximum time of either envelope curve rise or fall is about 15 minutes so the total envelope time can be up to about 30 minutes Page 4 Ping Divider Multiplier Once a ping time has been established you can then divide or multiply it from 1 8th the speed to 8 times the speed in whole number increments The resulting clock is called the Divided Multiplied Ping Clock or just Ping Clock for short The Ping button flashes to the rate of the Divided Multiplied Ping Clock The Ping Div Mult knob sets the amount of multiplication or division of the incoming ping time along with any CV that s applied to the Div jack the knob sets the offset for the CV Changing the Div Mult amount in the middle of an envelope will have no effect until a ping clock is received or the divided ping clock timing period renews or the envelope starts a new rise fall segment See Figure 1A Giving a pulse to the QNT jack 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
20. trigger into Async jack on one channel For example to set the blue channel to lag by 25 90 phase difference hit the trigger a quarter of the way after a red channel pulse CV Skew Changing the skew will change the timing that the peak of the envelope occurs Thus sweeping the Skew of one channel while holding the other steady will cause the envelope peak to shift in phase with respect to the other envelope s peak Quantized phase selection Slow each channel down to 8 Speed your clock up if necessary Turn blue channel cycle off Listen to the red channel and at a moment right before you want the blue channel to come in press the Cycle button on The blue channel s phase will be quantized to one of 8 possible phases 0 45 90 135 180 225 270 or 315 It helps to set a sharp attack on the red channel Skew at 100 so you can hear the timing better Cycle button can be turned off and back on to change phase again Use different Div settings for different possible phase shift amounts e g 7 gives 0 51 102 etc Quadrature patch First you have to set up the phase difference between the two channels The easy 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
21. umber of repeats you want for that particular step For example suppose you have an 8 step sequence and you want notes to be played once for every step until the last note which you want to be repeated 8 times and played 8 times as fast set the sequencer steps 1 7 to OV 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 gt SCM In and SCM x1 gt PEG QNT playing with SCM s PW knob Self oscillation self patched Very chaotic interesting noises Needs a human to fine tune the settings Spend some time on this one Patch EOF to Ping Patch ENV output to your audio mixer Set Div Mult to between and x2 adjust this very slowly throughout the patch Cycle On Scale will be your output volume Skew and Curve effect the timbre heh Give PING a few taps to get it started More advanced Do the basic patch to both channels with both ENV outputs going to an audio mixer or just listen to the OR output Now patch Half Rise into the T jack Play with Cycle button settings Keep patching each channel into itself and or the other Try running one channel s output to control a filter the other controls a VCO running into the filter Clockable Trigger Delay A trigger is fed in and after a delay which is determ
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