TouchOSC is not available for Windows but there are a few alternatives that runs on Windows with similar functionality. The best Windows alternative is Open Stage Control, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to TouchOSC and three of them are available for Windows so hopefully you can find a suitable replacement. Other interesting Windows alternatives to TouchOSC are OSCillation (Free) and WorkCAD Designer (Free).
OSCillation, the new WORK PRO free software for Android and Windows PC, is an application for the control of devices through OSC Protocol. Users will be able to control several devices at the same time thanks to its multi-target capability.
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OSCillation vs TouchOSC opinions
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It was developed for lighting rather than MIDI control.
WorkCAD Designer is the sofware of WORK® designed to manage audio through TCP/IP and USB. It is suitable for many devices like the Digiline series and allows the independent control of each unit. WorkCAD Designer in action.