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JUCE is the most widely used framework for audio application and plug-in development. It is an open source C++ codebase that can be used to create standalone software on Windows, macOS, Linux, iOS and Android, as well as VST, VST3, AU, AUv3, AAX and LV2 plug-ins.

JUCE allows developers to focus on the most valuable parts of their software by taking care of the differences between operating systems (both desktop and mobile) and plug-in formats. With JUCE’s library of digital audio processing (DSP) building blocks you can quickly prototype and release native applications and plug-ins with a consistent user experience across all supported platforms. Using JUCE also future-proofs your products against operating system and plug-in host updates.
A Quantum Leap is needed else the same thing is gonna drag on for years. I type things and as I type I think this is all familiar, so I look way way back in the forum posts of years n years n years... and sure enough it's all been said before.

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