Happy Nerding FX Aid
A compact Eurorack multieffects module with user-reflashable firmware and stereo signal path
Overview
The Happy Nerding FX Aid is a 4 HP Eurorack module with 32 audio effects, arranged in 4 banks of 8. It has three effect controls and an analog Dry/Wet knob with its own CV input. The CV works in reverse: positive CV fades from wet to dry, negative from dry to wet. There are four user-storable presets. Each one recalls the selected effect and all three control settings, but not the Dry/Wet knob position. The firmware can be reflashed. Load custom Spin FV-1 programs by playing a 40-second WAV file into the CV input, after holding both buttons for 10 seconds to enter firmware update mode. An editor application manages the effects. Do not use the FX Aid with the Pro editor, because it will brick the device.
Specifications
| Product type | Multieffects module in Eurorack format |
| Size | 4 HP |
| Effects | 32 unique audio effects in 4 banks of 8 |
| Controls | Three effect controls plus analog Dry/Wet control with CV input |
| Preset storage | Four user storable presets (stores effect and three controls) |
| CV capabilities | Assignable CV input to effect controls or Sample Rate Reducer; reverse CV operation on Dry/Wet |
| Signal path | High quality stereo signal pass |
| Firmware update | Hold both buttons for 10 sec; play WAV file to CV input |
| MSRP | 200 USD or 180 Euro (conflicting reports: 170€ + VAT also cited) |
Design
The FX Aid is based on the Spin FV-1 DSP chip and uses an analog Dry/Wet control. The CV input can be assigned to modulate effect parameters or the Sample Rate Reducer, which alters the internal clock. The module is reverse power protected, like other Happy Nerding designs.
Context
The FX Aid has a bigger sibling, the FX Aid XL, which adds separate CV inputs for each effect parameter and the SRR. The base FX Aid can be fully reflashed with user-selected effects through a standalone editor, so you are not stuck with the factory set of 32. The FX Aid Pro is a different unit. It supports 200 effects and should not be used with the same editor software.
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