Akashic Guitar effects circuit lookup
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Scientific Guitarist

KDLAA Modulated Delay with Adjustable LFO Shape and Extended Delay Time

Category
Delay
Price
see vendor

From the vendor

Does the world need one more delay pedal? Why, yes, yes it does, and the KDLA is it. So what sets it apart? The modulation can be adjusted from subtle to extreme, mimicking warped vinyl, tape "wow", and other, more subtle, effects. In addition, the delay time can be stretched to over 1500 ms, though it does degrade the delayed signal significantly. It's perfect for that old-school, lo-fi, tape-style delay.

The KDLA is really born out of an amalgamation of the Stalker and the Wobble Box. It utilizes the delay topology from the Stalker (with added feedback control) and a modified version of the Wobble Box LFO that allows for adjustable shape. The plus side of this circuit is that the ES56033 allows for more usable delay times, both shorter and longer, than the ubiquitous PT2399. Aside from that, the overall circuit topology is pretty straightforward.

Additionally, since I have plenty of

Schematic

The schematic is in the vendor's build document, page 1. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 45 rows

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RefValueNormalizedTypeNotes
Resistors 17
×168R68Resistorshopping list
×1120R120Resistorshopping list
×11k1kResistorshopping list
×11k21.2kResistorshopping list
×12k22.2kResistorshopping list
×14k74.7kResistorshopping list
×510k10kResistorshopping list
×412k12kResistorshopping list
×315k15kResistorshopping list
×222k22kResistorshopping list
×133k33kResistorshopping list
×1100k100kResistorshopping list
×2120k120kResistorshopping list
×1180k180kResistorshopping list
×4220k220kResistorshopping list
×1330k330kResistorshopping list
×11M1MResistorshopping list
Capacitors 13
×147pF47pCapacitorshopping list
×1100pF100pCapacitorshopping list
×1220pF220pCapacitorshopping list
×21nF1nCapacitorshopping list
×44.7nF4.7nCapacitorshopping list
×110nF10nCapacitorshopping list
×347nF47nCapacitorshopping list
×4100nF100nCapacitorshopping list
×41uF1uCeramic/Film Capacitorshopping list
×14.7uF4.7uElectrolytic Capacitorshopping list
×122uF22uElectrolytic Capacitorshopping list
×247uF47uElectrolytic Capacitorshopping list
×2100uF100uElectrolytic Capacitorshopping list
Diodes 1
×11N58171N5817shopping list
Transistors 1
×1BC549BC549shopping list
ICs 2
×1LM7805LM7805shopping list
×3TL072TL072shopping list
Potentiometers 4
×1A1kA1kPotentiometershopping list
×3B50kB50kPotentiometershopping list
×1B100kB100kPotentiometershopping list
×1C100kC100kPotentiometershopping list
Trimmers 1
×110k10kTrimmershopping list
Switches 1
×13PDT3PDTfootswitchshopping list
LEDs 1
×1LEDLEDshopping list
Jacks & sockets 2
×21/4”1/4”input jackshopping list
×1DCDCpower jackshopping list
Other 2
×1ES56033EES56033Eshopping list
×1EnclosureENCLOSUREshopping list