# Changes : Jazz Sheet Markup > Text-based ABC lead sheet editor & viewer with real-time rendering & transpose. Canonical page: [https://chrome-stats.com/d/jp.example.readsheetreader](https://chrome-stats.com/d/jp.example.readsheetreader) ## Overview - **ID:** `jp.example.readsheetreader` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** DS soft - **Category:** MUSIC\_AND\_AUDIO - **Downloads:** 35 - **Version:** 1.39 - **Last updated:** 2026-09-24 - **First published:** 2025-12-20 - **Publisher country:** JP - **Size:** 10 MB - **Data as of:** 2026-09-25 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=jp.example.readsheetreader) - **Website:** [https://dss.shisyou.com/](https://dss.shisyou.com/) - **Privacy policy:** [https://dss.shisyou.com/privacypolicy.html](https://dss.shisyou.com/privacypolicy.html) ## Description Create practical jazz charts with flexible ABC notation — and take them straight to the jam session.

Changes is a flexible ABC notation editor and renderer designed for practical lead sheets on your phone.

Write standard ABC notation, use simplified input, or start with just notes and chords. See your music rendered instantly, transpose it, play it back, and share it with other musicians.

A lead sheet doesn't always need to be a PDF. Sometimes a few lines of text are all you need.

■ KEY FEATURES

● Flexible ABC Notation

Changes supports standard ABC notation while allowing more flexible input than a strict ABC file.

・Notes, chords, durations, rests, ties, triplets, repeats, and barlines
・Optional title, key, meter, tempo, composer, and genre metadata
・ABC headers are optional
・Fault-tolerant input when durations are incomplete
・Automatic measure fitting

For example:

"Dm7" D F A c | "G7" B4 |

That's enough to create a readable lead sheet.

Use full ABC notation for precise control, or keep your input simple for a quick chart.

● Designed for Small Screens

Changes is not simply a desktop-style score shrunk onto a phone.

The display is designed around what a player needs to read at a glance:
・Clef and time signature are omitted to save space
・Adjustable line spacing and chord size
・Fullscreen display for rehearsal and performance
・Keep the screen awake
・Chord-only mode for rhythm charts and chord-change practice

The goal is simple: keep the important musical information readable on a small screen.

● Real-Time Rendering

No "Render" button.

Your sheet music updates as you type, so you can see the result immediately.

Write it as text. See it as music.

● Transpose for Real-World Playing

Set the song key and player's instrument independently.

・B♭: Tenor Sax, Trumpet
・E♭: Alto Sax, Baritone Sax
・F: French Horn
・Transpose melody for the player's instrument
・Optionally keep chords in concert pitch
・Transpose for vocalists and other lead players

For example, change a chart from B♭ to C for a vocalist, then display it as an E♭ part for an alto saxophonist.

● Audio Playback & Practice

Hear your chart directly from the editor.

・Swing/jazz playback
・Adjustable BPM
・Mute melody for improvisation practice
・Mute chords for comping practice

Write it, play it, and practice it from the same screen.

● Jazz Chord Symbol Customization

Choose the chord notation you prefer:

・Half-diminished: m7-5 ⇔ ø
・Minor: m ⇔ -
・Major: Maj ⇔ △ ⇔ M
・Diminished: dim ⇔ o
・Augmented: aug ⇔ +

● Interactive GUI Editing

Text is fast, but sometimes a visual edit is easier.

Tap a note, chord, or measure on the rendered sheet and adjust it through an interactive dialog.

● Save, Share & Collaborate

・Save and load lead sheets
・Share charts as plain text
・Send them through messaging apps, email, or cloud storage
・Let session partners edit the text and send it back
・Display a clean fullscreen chart or share it as a screenshot

● AI Composition Assistant

Optional AI tools can help generate ABC lead sheets.

・Use your own Gemini API key
・Copy ready-to-use prompts
・Use the prompts with your preferred AI service

AI is optional. Changes is an ABC notation and lead sheet tool first.

■ FOR JAZZ PLAYERS, COMPOSERS & MUSICIANS

Changes is useful for jazz players, composers, arrangers, vocalists, teachers, students, and anyone who works with ABC notation.

From a quick chord chart at a jam session to a complete jazz lead sheet, Changes helps you move from text to practical sheet music in seconds.

Write it as ABC notation.
See it as music.
Set the key.
Choose the instrument.
Transpose it.
Play it.
Practice it.
Share it.

Changes — flexible ABC notation for practical, mobile-friendly jazz charts. ## Rankings - #2,432,510 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_ADSERVICES_TOPICS` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.FOREGROUND_SERVICE` - `android.permission.INTERNET` - `android.permission.WAKE_LOCK` - `com.android.vending.CHECK_LICENSE` - `com.google.android.gms.permission.AD_ID` - `jp.example.readsheetreader.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [Easy LeadSheet Viewer](https://chrome-stats.com/d/com.tomkos.leadsheet) — 12 users - [Chord Sheet Writer](https://chrome-stats.com/d/com.instachord.ickey) — 14,165 users, 3.60 / 5 - [MaeMusic: Sheet Music Reader](https://chrome-stats.com/d/com.maestrosoftwaredevelopment.maemusic) — 3 users - [Jazz Piano Chords lite](https://chrome-stats.com/d/uk.chordnamer.jazzpianochordslite) — 10,883 users - [Chord Sheet Pro](https://chrome-stats.com/d/com.chordspro) — 2,794 users - [SongChordEditor](https://chrome-stats.com/d/com.magnificat.songchordeditor) — 13 users - [Real Jazz Practice](https://chrome-stats.com/d/com.musicapp.notationpractice) — 108 users - [Simple Chords](https://chrome-stats.com/d/app.simplechords) — 693 users - [Dom7 Chord Charts](https://chrome-stats.com/d/com.grantkidner.chordkeeper) — 15 users - [Jazz Piano Chords](https://chrome-stats.com/d/uk.chordnamer.jazzpianochords) — 841 users - [Maestro - Music Composer](https://chrome-stats.com/d/com.futuresculptor.maestro) — 4,467,890 users, 4.15 / 5 - [ChordyV](https://chrome-stats.com/d/io.github.mulfiethea_pixel.twa) — 105 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/jp.example.readsheetreader)