Choritsu 2.1.0 — Sharper EQ, new wave mark

Choritsu 2.1.0 sharpens the parametric EQ and refreshes the brand mark. The lossless sample-rate switching and the EQ engine itself are unchanged.

What's new

• New app icon & brand mark — two offset sine waves on sumi ink: a cream signal wave carrying two EQ band nodes, shadowed by a 利休-green afterimage (the output trailing the source as the sample rate shifts). Replaces the old boost-bell curve. The menu-bar icon and the panel's top-left logo use the same mark.
• EQ curve renders high-Q bands correctly — the response graph now samples each band's centre frequency, so narrow (high-Q) peaks show their true height and width instead of flattening out above Q≈1. Imported AutoEQ presets keep their full Q range.
• Glass UI polish — the EQ toolbar's Import / add / reset buttons are now uniform capsule glass; per-band enable checkboxes are tinted 利休 green; the EQ panel is a fixed size, so adding bands no longer makes the window jump.
• Smoother, lighter spectrum — neighbour-blended with a gentle attack so it reads as a soft envelope, and drawn on its own layer (64 bins @ 24 fps) so it no longer forces the static response curve to repaint.
• Instant EQ panel — opening the EQ no longer plays a transition that could stutter.
• Import dialog comes to the front — the AutoEQ file picker now activates the app instead of opening behind whatever's frontmost.

Install

1. Download Choritsu-2.1.0.zip, unzip, and move Choritsu.app to /Applications.
2. This build is ad-hoc signed (not notarized), so Gatekeeper blocks it on first launch. Clear the quarantine flag, then open:

   xattr -dr com.apple.quarantine /Applications/Choritsu.app
   

Requirements

• macOS 26 Tahoe or later
• Apple Music (subscription or local library)

On first run, macOS asks to control Music (Automation) and access Media & Apple Music. Turning on the EQ adds a one-time audio-recording prompt (the muted process tap).