FREE JSFX Plugin: E-ChorusFX700 by Windows-G

[Windows]

E-ChorusFX700 is a clean, digital chorus plugin designed to add width, depth, dimension, and movement to your tracks or mixes. It is capable of delivering subtle, transparent chorus all the way to the full, nostalgic “washy” sound of the 80s and 90s.

Features:
* Two LFO Shapes:
1. Triangle: Because triangle waves move at a constant speed in both directions (up and down), when modulating delay they produce less obvious volume pumping, giving a steady and consistent chorus sound.
2. Sine: Because sine waves move slowly at the peaks and troughs then accelerate through the middle, when modulating delay they produce more noticeable volume pumping, resulting in a dynamic and pumpy chorus sound.
* Delay (0–50 ms): Sets the base delay time for the LFO modulation. Short delays (0.1–5 ms) create a sweeping, flanger-like effect due to comb filtering. Mid-range delays (6–12 ms) produce transparent, single-voice chorus with subtle thickening. Longer delays (13–50 ms) produce highly spacious chorus with more noticeable doubling.
* Depth (0–100%): Controls how far the modulation sweeps above and below the base delay time; this is the intensity of the modulation. Lower values create narrower sweeps, resulting in a subtle, gentle chorus effect, while higher values create wider sweeps, resulting in a more intense chorus effect. At 0%, there's no modulation, while at 100%, the modulation uses the full range of the delay time.
* Rate (0–15 Hz): Controls the speed of the modulation. Lower rates create slow, gentle detuning, while higher rates create faster, more vibrato-like effect. If you are unsure of how to dial in tempo-synced Hertz values for the Rate slider, you can use my E-AudioUnitConverter plugin. It converts note values into milliseconds, seconds, and Hertz based on your chosen tempo: https://windowsg.gumroad.com/l/unitconverter
* Width (0–100%): Controls the stereo width by offsetting the phase relationship between the left and right channels. At 0%, the modulation pattern is mono (identical on both channels), creating a centered chorus. At 100%, the channels are maximally out of phase, creating a wide stereo chorus.
* Dry (0–100%): Controls the level of the original, unprocessed signal. At 0%, the original signal is completely removed. At 100%, the original signal is at full level.
* Wet (0–100%): Controls the level of the chorused signal. At 0%, the chorus effect is completely removed. At 100%, the chorus effect is at full level.
While a single dry/wet mix knob works great for most effects, independent dry and wet controls are particularly beneficial for chorus, where previewing the chorused signal separately helps you make more precise mixing decisions.
* Wet HPF (10 Hz – 20 kHz): Applies a high-pass filter to the wet signal only. The filter becomes active only when the frequency is set above 10 Hz. Use it to roll off low frequencies and focus the chorus effect on the mids and highs.
* Wet LPF (20 Hz – 21 kHz): Applies a low-pass filter to the wet signal only. The filter becomes active only when the frequency is set below 21 kHz. Use it to roll off high frequencies and create a darker, warmer chorus character.
* Output Gain (dB): Sets the final output level of the plugin from -30dB to +30dB to compensate for volume changes.
* Bypass (Smooth): The GUI features a dedicated bypass button for toggling the chorus effect on or off without audio clicks. Available for automation as “Bypass (Smooth)” in the parameter list.
* Zipper-Noise-Free Operation: Advanced interpolation ensures no zipper noise during slider automation or real-time adjustments.
* Visual Feedback: Clear indicators show the selected LFO shape (Triangle or Sine) and the active status of the wet high-pass and low-pass filters.
* Minimal CPU Usage

There are audio demos on the Gumroad page.

Link: https://windowsg.gumroad.com/l/chorusfx700

This JSFX plugin can also be used in other DAWs through the open-source YSFX plugin. YSFX is available in VST3, AU, and CLAP formats for Windows, macOS, and Linux. Download YSFX here: https://github.com/JoepVanlier/ysfx/releases

E-ChorusFX700 (Windows-G).png

[Cuauhtli]

Thanks. Looking forward to trying it out.

[Windows]

Thanks. Looking forward to trying it out.

You are welcome! If you have a moment after trying it out, you could leave a review. Thanks.

[Windows]

Hi, I updated the plugin on 21st January, 2026.

Changelog:
Made GUI buttons backward compatible in older REAPER versions. As a result, the plugin graphics now compile correctly in older versions of REAPER without affecting newer versions. Also, this doesn't affect the underlying audio processing code of the plugin; the older and new version null 100% in a null test.