Visualz 3.0.4

Targeted release focused on the audio engine. The analysis worklet and BPM-tracking pipeline were retuned for cleaner onset edges and more stable beat lock when the input has heavy low-end or sustained pads.

Fixes

• Onset-flag pump dedup hardened — double-starting the engine no longer races the edge-triggered flag and kills BPM-reactive visuals.
• Audio analysis worklet thresholds adjusted for more reliable detection on quiet / sustained material.
• Render engine + engine store paths cleaned up around the analysis hand-off.