Post by keurslagerkurt on Mar 22, 2021 10:36:22 GMT
Hey all!
Last week a posted a live track where I used a kick drum I made on my breadboard. The kick drum was derived from a schematic from Korg's Monotribe drums. There is an interesting discussion about porting this schematic to eurorack on Muffwiggler, with loads of extra info and mods, and also with the original schematic:
www.muffwiggler.com/forum/viewtopic.php?t=244390&view=unread#unread
People seemed to like the kick, so I thought I'd share it here! Its a muffled, but fairly deep kick. However, I have not found a way yet to reliably tweak the decay and tuning of the circuit (not sure if the tuning is even possible). Anyway, I added my 'draft' of the circuit for AE down below. I indicitated two places where I have played with adding CV voltage through a voltage divider potentiometer. The two pots are very interactive and only a relatively small portion of their turn is really useful, so this is by no means a 'proposed' way to go.
Schematic_Monotribe Kick_2021-03-22.pdf (49.51 KB)
I added a second stage (after R9), which is a transistor based boost circuit that bumps up the volume and punch (its actually the same circuit as my soon-to-come-out Quad Boost module kit). Its very much necessary to get more than just a click out of the original korg circuit (which I'm sure also features a boost stage afterwards).
Input is a trigger coming in at C1. Output is taken from in between C6 and R11. I should note that I boosted an AE modular topograph trigger from its average 3.5V to 5V using an MCP opamp stage. This gave the output kick also more volume and decay. I should also note that I sent the kick output through the AE modular 2VCA controled by 2ENV.
Anyway, I don't understand an awful lot about the Korg circuit and how the transistors and bunch of capacitors engage exactly. It is def a tricky circuit, its very sensitive to changing resistor values and 'wanting to work'. I'm not sure yet if it is worth building further on this circuit or better to try out a more versatile & tweakable one. However its pretty fun, with only very common parts, and fairly easy to build on a breadboard!
Cya around!
Last week a posted a live track where I used a kick drum I made on my breadboard. The kick drum was derived from a schematic from Korg's Monotribe drums. There is an interesting discussion about porting this schematic to eurorack on Muffwiggler, with loads of extra info and mods, and also with the original schematic:
www.muffwiggler.com/forum/viewtopic.php?t=244390&view=unread#unread
People seemed to like the kick, so I thought I'd share it here! Its a muffled, but fairly deep kick. However, I have not found a way yet to reliably tweak the decay and tuning of the circuit (not sure if the tuning is even possible). Anyway, I added my 'draft' of the circuit for AE down below. I indicitated two places where I have played with adding CV voltage through a voltage divider potentiometer. The two pots are very interactive and only a relatively small portion of their turn is really useful, so this is by no means a 'proposed' way to go.
Schematic_Monotribe Kick_2021-03-22.pdf (49.51 KB)
I added a second stage (after R9), which is a transistor based boost circuit that bumps up the volume and punch (its actually the same circuit as my soon-to-come-out Quad Boost module kit). Its very much necessary to get more than just a click out of the original korg circuit (which I'm sure also features a boost stage afterwards).
Input is a trigger coming in at C1. Output is taken from in between C6 and R11. I should note that I boosted an AE modular topograph trigger from its average 3.5V to 5V using an MCP opamp stage. This gave the output kick also more volume and decay. I should also note that I sent the kick output through the AE modular 2VCA controled by 2ENV.
Anyway, I don't understand an awful lot about the Korg circuit and how the transistors and bunch of capacitors engage exactly. It is def a tricky circuit, its very sensitive to changing resistor values and 'wanting to work'. I'm not sure yet if it is worth building further on this circuit or better to try out a more versatile & tweakable one. However its pretty fun, with only very common parts, and fairly easy to build on a breadboard!
Cya around!
I'll be watching & reading about twin-T resonators the next days then 
