Happy Nerding FX Aid
32 stereo effects in 4 skiff-friendly HP
4 HP Eurorack module
The Happy Nerding FX Aid is a compact 4HP stereo multi-effects processor for Eurorack modular synthesizers, built around the Spin Semiconductor FV-1 DSP chip. It provides 32 high-quality effects organized across 4 banks of 8 programs, covering delays, reverbs, choruses, flangers, phasers, pitch shifters, frequency shifters, filters, dynamics, and drum synthesis. Its true stereo signal path, analog dry/wet control, and assignable CV input make it a highly versatile and space-efficient effects hub for any modular setup.
Features
- 32 effect programs in 4 banks of 8, based on the Spin Semiconductor FV-1 DSP chip
- True stereo input and stereo output via 3.5mm jacks
- Mono-to-stereo normalling: left input normalled to both channels when only left is patched
- Analog dry/wet mix control via dedicated knob and dedicated CV input
- Assignable CV input routable to Parameter 1, 2, 3, Sample Rate Reducer, or Preset Selection
- D/W CV input with inverted response: positive CV crossfades toward dry, negative toward wet
- 4 user-storable quick presets remembering program selection and all three control positions
- Last used effect and CV assignment retained after power off
- User-replaceable firmware via WAV file loaded into CV input
- Online editor at https://fxaid.app/ for custom 32-program bank creation
- Over 200 effect programs available in the full library
- Skiff-friendly 25mm depth
Controls & Jacks (16)
- P1— Effect parameter 1 control. Function depends on the selected effect program.
- P2— Effect parameter 2 control. Function depends on the selected effect program.
- P3— Effect parameter 3 control. Function depends on the selected effect program.
- Dry/Wet— Analog dry/wet mix control. Fully left is 100% dry, fully right is 100% wet. Not stored in presets.
- Left— Navigate bank/program selection left. Press to change bank or scroll programs.
- Right— Navigate bank/program selection right. Press and hold 4 seconds to enter firmware update mode.
- CV— CV input for effect parameter modulation.
- Dry/Wet CV— CV input for dry/wet mix modulation.
- In L— Left audio input.
- Out L— Left audio output.
- In R— Right audio input. Normalled to In L when unpatched.
- Out R— Right audio output.
- Bank/Program LED 1— Bank/program indicator LED 1.
- Bank/Program LED 2— Bank/program indicator LED 2.
- Bank/Program LED 3— Bank/program indicator LED 3.
- Bank/Program LED 4— Bank/program indicator LED 4.
How-To Guides
- Storing a Quick Preset
- Recalling a Quick Preset
- Loading Custom Firmware
- Infinite Shimmer Pad
- Tape Delay Self-Oscillation
- Parallel Pitch Harmony
- Rhythmic Ping-Pong Delay
- Through-Zero Flanger Sweep
- Reverb Freeze Drone
- CV-Controlled Vowel Filter
- Lo-Fi Bit Crusher Texture
- Voltage-Controlled Preset Morphing
Explore the interactive FX Aid panel on BleepDex — tap any control to learn what it does.