======================================================================
 TWINFOLD  v1.1.0
 Stereo Imager Plugin
 Tonecraft Tokyo
======================================================================

* Overview

TWINFOLD is a stereo imager where the mono sum stays the same whether
you widen or narrow the stereo spread. Processing is applied only to
the difference between left and right (Side).

  - WIDTH to intuitively control overall stereo spread with a single
    knob
  - BASS MONO to tame low-end spread and keep the bass centered
  - Vectorscope that smoothly auto-scales to the input level
  - Phase correlation meter to monitor output phase correlation
  - MONO LOSS meter to constantly monitor how much the level drops
    in mono
  - ZERO LATENCY mode with no latency, for recording or live
    performance
  - 7 factory presets and A/B comparison
  - Supports insertion on mono tracks (mono in / stereo out)


* Requirements

OS               Windows 10 / 11 (64bit)
                 macOS 11 or later (Apple Silicon / Intel)
Format           Windows: VST3 / Mac: VST3, AU
Supported hosts  DAWs supporting VST3 or AU
Input            Stereo or Mono
Output           Stereo
Sample rate      Host dependent
Window size      960 x 600 (fixed)
Screen language  Japanese / English (follows the OS display language)
Latency          Yes (DAW compensated. No latency with ZERO LAT on)


* Installation

[Windows]

  1. Extract this ZIP file.
  2. Copy the TWINFOLD.vst3 folder to the following location:

       C:\Program Files\Common Files\VST3\

  3. Launch your DAW and perform a plugin rescan.
     (If you copy the file while your DAW is running, changes may
     not take effect.)

To uninstall, delete the TWINFOLD.vst3 folder you copied.


[Mac]

  1. Extract this ZIP file.
  2. Copy TWINFOLD.vst3 and TWINFOLD.component to their respective
     locations:
     (~ represents your user home folder. You can open it by pasting
     the path into Finder: Go -> Go to Folder. Create the folder if
     it does not exist.)

       TWINFOLD.vst3      -> ~/Library/Audio/Plug-Ins/VST3/
       TWINFOLD.component -> ~/Library/Audio/Plug-Ins/Components/

  3. Open Terminal (Applications -> Utilities -> Terminal), paste the
     following three lines one by one, and press Return:

       cd ~/Library/Audio/Plug-Ins
       xattr -dr com.apple.quarantine VST3/TWINFOLD.vst3
       xattr -dr com.apple.quarantine Components/TWINFOLD.component

     If nothing is displayed, it succeeded. If you do not run this,
     macOS will show messages like "is damaged and cannot be opened"
     or "cannot be opened because the developer cannot be verified",
     and the DAW will not load the plugin. This command only removes
     the quarantine attribute that macOS attaches to downloaded files
     (you need to run it again when updating or reinstalling).
  4. Launch your DAW and perform a plugin rescan.
     (If the AU plugin does not appear in Logic Pro or other DAWs,
     restart your Mac.)

To uninstall, delete TWINFOLD.vst3 and TWINFOLD.component that you
copied.


* Quick start

  1. Install the plugin and insert it on a track in your DAW.
  2. Turn the WIDTH knob to adjust stereo spread.
  3. If you notice low-end muddiness, turn on BASS MONO and use FREQ
     to set the frequency limit to make mono.
  4. Widening the highs heavily may cause a slight ringing just
     before attacks. If that concerns you, turn on ZERO LAT.

For detailed instructions, see the bundled TWINFOLD_Manual_EN.html.


* About the download warning

[Windows]
Because the software is not code-signed, your web browser may show
a warning when downloading the ZIP. In that case, choose to keep or
allow the download.

Also, before unzipping, right-click the ZIP file and open Properties.
If you see "Security: This file came from another computer..." at
the bottom, check "Unblock", click OK, and then extract the files.

[Mac]
Run the command in Step 3 of the installation instructions. Do the
same when updating or reinstalling.

This product is a VST3 / AU plugin. It does not launch on its own;
your DAW loads it as a plugin.


* About TWINFOLD Pro

For users looking for more advanced processing, an upgraded edition,
"TWINFOLD Pro", is also available.

  - Independent 3-band stereo width adjustment (LOW / MID / HIGH)
  - RECOVER to make up the level lost by narrowing, in the Mid
  - STEREOIZE to synthesize natural stereo from mono sources
  - Mono auditioning (MONO) and Side solo auditioning (SIDE) features
  - AUTO WIDTH to automatically track target stereo spread
  - Per-band phase correlation display and dragging crossover lines
    with the mouse
  - Preset save, delete, and file export/import (.twinfold)


* Notes

  - This product is distributed free of charge (freeware) as-is,
    without support.
  - The source code is closed source.
  - The copyright of this product belongs to Tonecraft Tokyo.
  - Modification, reverse engineering, redistribution, and resale
    are prohibited. Please obtain downloads only from the official
    Tonecraft Tokyo website and BOOTH.
  - Free to use for both commercial and non-commercial purposes.


* Disclaimer

  - This product is provided "AS IS", without warranty of any kind,
    express or implied, including but not limited to merchantability,
    fitness for a particular purpose, and non-infringement of
    third-party rights.
  - Tonecraft Tokyo is not liable for any damages arising from the use
    of, or inability to use, this product, including but not limited
    to loss or corruption of project files or audio data, equipment
    malfunction, lost working time, or lost profits.
  - Operation is not guaranteed for every combination of DAW,
    operating system, and hardware.
  - Specifications may change, and the product may be discontinued,
    without notice.
  - Use this product at your own risk. Back up your projects before
    important work.


* Feedback

  We welcome your feedback and impressions.

    info@tonecraft.blue-x.tokyo

  We cannot promise individual support. However, your feedback will
  be used as reference for future product development.


* Licenses

  - VST is a trademark of Steinberg Media Technologies GmbH.
  - This product uses JUCE.
  - Noto Sans JP / JetBrains Mono - SIL Open Font License 1.1


* Distributed by

  Tonecraft Tokyo
  https://www.tonecraft.blue-x.tokyo/free-vst-plugins

(c) 2026 Tonecraft Tokyo. All rights reserved.
