Audulus allows users to create custom UI for modules using Lua and GLSL, offering unique design flexibility not found in traditional modular synths.

Audulus 4 now supports new UI nodes like sliders and X-Y pads, offering enhanced control options for custom patch design.

The Canvas Node feature enables users to craft custom interfaces with Lua, highlighting Audulus's flexibility in user-driven design.

Recursive exposure of modules allows for the creation of complex front-panels, enhancing the modular synthesis experience by building layers of functionality.

The Complex VCO in Audulus allows West-Coast style synthesis, using one oscillator to frequency modulate another, offering versatile sound design options.

Audulus provides a digital-native UI, contrasting with VCV Rack's Eurorack emulation, making it more accessible for those unfamiliar with coding.

Audulus 4 is noted to be more user-friendly for newcomers compared to Audulus 3, making it easier to unlock its full potential.

Audulus 4 is currently available for macOS and iPadOS, with plans for a potential Windows version, subject to future development.

Audulus 4's patches are backwards-compatible with Audulus 3, though some UI elements might require adjustments due to spacing changes.

The multitouch feature on iPadOS allows for interactive performance surfaces, enhancing live performance capabilities.

The incorporation of MIDI output via a MIDI Send node expands Audulus 4’s utility for complex setups involving external MIDI gear.

The ability to share patches widely through the free version encourages collaboration and broadens the potential user base by enabling easy distribution of custom instruments.

Tutorials like "Wired Up with Mark 1" are praised for making Audulus 4 more accessible to newcomers, enhancing understanding and usability.

Some users experience issues with app unlocking across multiple devices, requiring troubleshooting like restarting or re-clicking the unlock option.

Users appreciate the improved search experience in the module browser, which streamlines the process of finding and utilizing specific modules.

Audulus 4 can be tried for free, with a $19.99 in-app purchase for patch creation, offering a cost-effective entry into modular synthesis.