4MQPLFOKIT

QPLFOKIT

4ms

Designed to be useful in small portable systems that require maximum functionality in minimal space, as well as large systems that need maximum modulation sources, the silver 4ms Quad Pingable LFO Kit is a do-it-yourself compact, playable four-channels each with tap tempo, clock-syncable LFO with variable skew and reset, in Eurorack format.The QPL features four independent LFOs that can produce a variety of shapes and each channel can easily modulate, trigger, and reset each other for complex and slowly morphing outputs. The Quad Pingable LFO Kit includes all the components needed to complete the module as well as a silver panel.Full DIY Kit Includes all the parts necessary to build a full-featured QPLFOAdvanced-Level Kit: Soldering proficiency requiredTools Needed (Not Included):Soldering iron, solderFlush snipsNeedlenose pliers (for removing a component if you make a mistake)5/16" and 3/8 socket driver (optional: pliers will work too if you're careful)Multimeter (for reading resistor values if you don't know the resistor color-code chart)Basic Overview Quad pingable LFO frequency is set by time between pulses (pings)Each of the 4 channels is an independent LFOCan produce a variety of waveshapes: pluck to ramp down, to triangle, to ramp up, and all shapes inbetweenChannels can easily modulate, trigger, and reset each other for complex and slowly morphing outputsSlowest period is about 71 minutes (0.0002 Hz), fastest speed is about 500 Hz (marginal tracking up to 1 kHz)Tap-tempo button is free-running (LFO runs indefinitely), but external clock/ping is autostopping (LFO stops when external clock stops)Controls and Jacks Ping button for manually setting the tempoPing jack sets tempo with an external clock (any complex signal can be used as a clock)On/mute button enables or mutes the output (latching button)Reset jack restarts the LFO without changing the tempo (rising edge triggered)OUT jack outputs either a 0 to 10V waveshape, or a -5V to +5V waveshape (jumper selectable)LED flashes and dims to the signal on the Out jackPing button flashes to the internal tap-tempo clock or to incoming pulses on the Ping jackOn/Mute button lights up when channel is OnSkew Knob and CV Control the waveshape by altering the ratio between rise and fall timesAt 0% Skew (0V of CV), the shape is a plucky near-exponential curveAt 1% Skew (just over 0V of CV), the shape is ramp-downAt 50% Skew (about 5V of CV), the shape is a triangleAt 100% Skew (about 10V of CV), the shape is ramp-upSkew knob provides offset to the incoming CV signal, so any range of CV is acceptableAdvanced Functions Ping and Reset inputs use comparators, so any waveshape can be used for triggering (audio waves, complex LFOs, even the QPLFO itself)Trim-pot on PCB allows for adjustment of comparator threshold valueFire-on-unmute jumper per channel:When this optional jumper is installed, pressing the On button to turn the channel on will reset the LFOIf the jumper is not installed (factory default), pressing On will unmute the LFO without resetting (LFO runs in the background when muted)Bipolar/Unipolar jumper:Setting jumper to Bipolar makes the outputs -5V to +5VSetting jumper to Unipolar makes the outputs 0V to +10VOne jumper controls all four channelsOne-shot mode: Reset jack can be used to trigger a one-shot envelope if the external ping clock is stopped. See manual for detailed discussionFloating Reset mode: Holding a high gate on Reset jack allows the waveshape to run freely without automatically re-syncing to the ping clock. A bare cable plugged into the jack causes a high gateConnects to other modules using ribbon cables:Outputs can connect to the 4ms VCA Matrix, or the 4ms SISM, the Circuit Abbey Intermix, or the Toppobrillo MixiplexerNormalization of ping jacks can connect to the 4ms Quad Clock Distributor Eurorack Ready 12 HP Eurorack format moduleMaximum Depth: 1.57" (40mm)Includes 10- to 16-pin power ribbon cable