FREE JSFX Plugin: E-StereoMaster200 by Windows-G

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E-StereoMaster200

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Sometimes, all I want to do is invert the phase of a track or reduce its stereo width. At times, I just want to swap the channels or convert the signal to mono to check for mono compatibility and detect phase issues. There are moments when the mono content of a full mix feels too dominant, and I just want to reduce the mid level slightly. Similarly, a master track may lean toward one channel, and all I want to do is adjust the gain of that specific channel to balance it out. In other cases, I want to monitor each channel independently to ensure my monitors are outputting at the same level, especially before making panning decisions. This plugin is the result of wanting all of these essential utility functions together in a single plugin.

Features:
* Phase Inversion: Invert left channel, right channel, or both channels
* Channel Swapping: Instantly swap left and right channels
* Mono Conversion: Choose from four modes: Sum (L+R), Left, Right, and Difference (L-R)
* Stereo Width Control: Adjust the stereo width of the input signal from 0% (fully mono) to 200% (extra wide). 100% is the default, with no effect applied
* Center Level Control: Adjust the level of the mid or mono content of the signal from 0% (fully removed) to 200% (overkill). 100% is the default, with no change
* Output Gain (-20dB to +20dB): Sets the final output level of the plugin to compensate for volume changes
* Channel Monitoring: Monitor both channels, left only, right only, the sum of both channels, or the difference between both channels in mono. You can use the slider menu or click the GUI buttons to select monitoring modes. The Sum and Difference modes are useful for checking mono compatibility and detecting phase issues
* Individual Channel Gain Control: Apply independent gain adjustments to the left and right channels
* Zipper-Free Operation: Advanced smoothing prevents audio artifacts during real-time adjustments of the gain sliders
* Visual Feedback: Triangular indicators show when Width, Center, and Channel Gain are increased or reduced
* GUI Bypass Button: A smooth bypass button for toggling the effect on or off without audio clicks. Available for automation as “Bypass (Smooth)” in the parameter list
* Minimal CPU usage

Grab it for FREE: https://windowsg.gumroad.com/l/stereomaster200

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-StereoMaster200 (Windows-G).png
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Last edited by Windows on Tue Mar 31, 2026 10:34 pm, edited 4 times in total.

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Hi, I've added direct clickable GUI buttons for all the Channel Monitor modes. This update makes channel monitoring significantly faster by providing immediate clickable access to all monitoring modes. Link remains the same.

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Hi, I have made some changes to the GUI buttons and the Stereo Width slider. Below are the details.

Stereo Width Slider Changes:
* Full slider range (0-200): No changes
* Narrowing range (0-99): No changes
* Neutral point (100): No changes
* Widening (101-200): Increased intensity of the stereo widening effect by approximately 3x. However, the widening range (101-200) remains unchanged.

GUI Changes:
* Channel Monitor buttons now highlight when you hover over them to indicate they are interactive.

Link remains the same: https://windowsg.gumroad.com/l/stereomaster200

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1. Added a smooth bypass button for toggling the effect on or off without audio clicks.
Last edited by Windows on Tue Mar 31, 2026 10:28 pm, edited 1 time in total.

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:tu:

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