What's New

Version 1.1

v1.1.1

June 29, 2026

Some QoL updates:

Engine Changes

• Allow the use of override (instant-play without modifying).
• Font weight options for certain fonts.

Audio Changes

• Enables the use of user-uploaded audio. Users can now upload and export their video with their own audio!

Bug fixes

• Further user verification flow improvements.

v1.1.0

May 23, 2026

The Animation Update! First big update to Comet! Here is everything you need to know about this update:

Engine Changes

• New Shortform video format (9:16)

5 New Themes

• Focus
• Midnight Grid
• Polaroid
• Starstreak
• Viewport

2 New Note Animations

• Pop
• Scrub

4 New Fonts

• Borel
• Chillax
• Dongle
• Lexend Deca

Version 1.0

v1.0.13

April 10, 2026

Small Updates: yep, the Theme Editor is proving to be a challenge.

Engine Changes

• Changed Rendering Technique

v1.0.12

March 23, 2026

Small Updates: final change before theme editor, for real REAL this time!

Bug Fixes

• Fixed incorrect measure clipping using custom measure selector
• Fixed audio clipping for dense piano playback

v1.0.11

March 22, 2026

Small Updates: final change before theme editor, for real this time!

Engine Changes

• Improved audio engine for simultaneous playback of multiple notes
• Custom measure selector playback for preview and recording

UX Changes

• Added Suisei West as a server option, server dropdown added
• Improved convert UI
• Changed tier labelling and colors

v1.0.10

March 05, 2026

Small Updates: final background changes before major update

Engine Changes

• Removed duplicated calculation logic, minor performance uplift to low-end systems
• Video exports to CFR, for better video editing compatibility
• Changed theme replacement logic, all users will always be up to date on themes

UX Changes

• Improved remaining conversion information panel
• Added direct links to privacy & terms of service

Bug Fixes

• Fixed proper MIDI range (0-128)
• Fixed degraded audio quality at export

v1.0.9

February 18, 2026

Small Updates: under the hood changes

Engine Changes

• Added scaffholding for user-created themes

Themes

• Included themes now have native lyrics widget support

UX Changes

• Improved sign-up flow
• Scrollable left column of Video Editor
• Changed track color selection logic (embedded # in hex)

Bug Fixes

• Fixed audio desynced when minimizing
• [Monitoring] Applied fix to recording stutter at beginning of song

v1.0.8

February 11, 2026

Big Updates: This should not be a patch release but there are massive additions in this version.

UX Changes

• Added seek, rewind and fast-forward buttons to Preview Mode

Engine Changes

• [NEW] Brand new audio engine.
• [NEW] 20 instrument support, now you can hear your MIDI with audio feedback.
• [NEW] Ability to export videos with built-in audio.

Lyrics Widget

• [NEW] Lyrics widget to display lyrics in sync with the music via word-by-word mode or measure-by-measure mode.
• [NOTE] Existing themes does not support this feature, look out for future theme updates.

Video Editor

• [NEW] Basic video editor to meant to combine your completed recordings and your external audio.

Bug Fixes

• [FIXED] Visual glitch at 50-100ms after playback start where it uses the default font.

v1.0.7

February 9, 2026

Small Updates:

UX Changes

• Added visual hints at Play Preview.

Engine Changes

• Added beat divider toggle.

v1.0.6

February 8, 2026

Small Updates:

Bug Fixes

• [FIXED] Playback error on multiple tempo changes in a single measure.

v1.0.5

February 7, 2026

Small Updates: To utilize the monthly conversions, use version 1.0.5 or later.

Changes

• Changed tier labelling.

v1.0.4

February 5, 2026

Small Updates:

Hotfix

• Fixed auto-updater logic.

v1.0.3

February 5, 2026

Small Updates:

UX Changes

• Changed Main Menu avatar layout

Known Issues

• Playback error on multiple tempo changes in a single measure.

v1.0.2

February 2, 2026

Small Updates:

Bug Fixes

• Fixed versioning consistency checks.

v1.0.1

January 23, 2026

Small Updates:

6 More Fonts

Additional Japanese-friendly fonts have been added to the app.

• FuteHodo Maru Gothic
• Kosugi Maru
• MPLUS Rounded 1c
• NicoMoji (kana only)
• Yukisyuku
• Zen Maru Gothic

Bug Fixes

• Fixed a bug where fonts would not transfer to playback.
• Fixed very frequent auth checks.

v1.0.0

January 21, 2026

Welcome to the official launch of CometMIDI! Here’s everything included in the 1.0 release:

10 Built-in Themes

Version 1.0 launches with 10 crafted themes to show off your MIDI piece, each with its own unique look.

• Blueprint
• Classic Light
• Classic Night
• Minimal Light
• Minimal Night
• Music Player
• Paster Light
• Paster Night
• Scorpion
• Terminal

Built-in Recorder

Record your visualizations directly within the app-no need for external screen recording software.

Customizable Appearance

Out-of-the-box customization options:

• Track Colors - Personalize the colors of your MIDI tracks
• Background Color - Set your preferred background color
• Text Color - Adjust text colors to match your style

Progress Bar Widget

A sleek progress bar widget to track your song’s playback position in real-time.