musescore/MuseScore
Oct 2024 – Oct 2025
13 Months active
Languages Used
C++CMakeJavaScriptQMLXMLYAMLPythonQt
Technical Skills
Code RefactoringScore EditingSoftware DevelopmentUI Navigation LogicUI/UX DevelopmentBuild System Management
Calum Matheson
PROFILE
Calum Matheson
Calum Matheson engineered core editing and UI features for the musescore/MuseScore repository, focusing on music notation workflows, accessibility, and editor reliability. Over 13 months, he delivered robust enhancements to the percussion panel, selection logic, and onboarding experience, using C++, QML, and the Qt framework. His work included refactoring selection and deletion logic for complex score elements, improving accessibility with keyboard navigation and screen reader support, and modernizing UI architecture for maintainability. By addressing stability, data integrity, and cross-platform usability, Calum’s contributions enabled faster feature delivery, reduced regression risk, and provided a more predictable, accessible experience for end users.
Overall Statistics
Feature vs Bugs
51%Features
Repository Contributions
240Total
Bugs
61
Commits
240
Features
63
Lines of code
44,208
Activity Months13
Work History
October 2025
11 Commits • 4 Features
Oct 1, 2025October 2025: MuseScore development focused on reliability, UX polish, and accessibility across playback, notation panels, and project state management. Key deliveries include unsaved state on instrument solo/mute changes; palette interaction fixes (measure-number interactions and frame insertion order); braille panel action resolution to ensure project-context correctness; hover shadow notes on piano keyboard with related macro/shadow display refactor; percussion panel notation preview background customization with rounded corners; and playback timing fix for fixed-note auditions to ensure notes start at intended ticks. Additional hardening covered color consistency for guitar bends/vibrato and alignment of legacy drumset panel color inversion with score inversion. These changes reduce data-loss risk, improve UI predictability, accessibility, and maintainability, and enable more accurate and expressive notation.
11 Commits • 4 Features
Oct 1, 2025October 2025: MuseScore development focused on reliability, UX polish, and accessibility across playback, notation panels, and project state management. Key deliveries include unsaved state on instrument solo/mute changes; palette interaction fixes (measure-number interactions and frame insertion order); braille panel action resolution to ensure project-context correctness; hover shadow notes on piano keyboard with related macro/shadow display refactor; percussion panel notation preview background customization with rounded corners; and playback timing fix for fixed-note auditions to ensure notes start at intended ticks. Additional hardening covered color consistency for guitar bends/vibrato and alignment of legacy drumset panel color inversion with score inversion. These changes reduce data-loss risk, improve UI predictability, accessibility, and maintainability, and enable more accurate and expressive notation.
October 2025
September 2025
10 Commits • 3 Features
Sep 1, 2025September 2025 MuseScore monthly summary: Focused on UX stability, data integrity, and testing readiness. Delivered targeted features to improve editing UX, fixed core stability bugs affecting templates, measures, and windowing, and established test scaffolding to speed development. Cross‑platform improvements reduced crash surfaces and improved onboarding experience for new users and contributors.
September 2025
10 Commits • 3 Features
Sep 1, 2025September 2025 MuseScore monthly summary: Focused on UX stability, data integrity, and testing readiness. Delivered targeted features to improve editing UX, fixed core stability bugs affecting templates, measures, and windowing, and established test scaffolding to speed development. Cross‑platform improvements reduced crash surfaces and improved onboarding experience for new users and contributors.
August 2025
22 Commits • 7 Features
Aug 1, 2025Concise monthly summary for 2025-08 highlighting delivered features, critical fixes, and measured impact for business value and code health. The month focused on onboarding improvements, UI architecture modernization, update/check improvements, and stability through targeted bug fixes and refactors.
22 Commits • 7 Features
Aug 1, 2025Concise monthly summary for 2025-08 highlighting delivered features, critical fixes, and measured impact for business value and code health. The month focused on onboarding improvements, UI architecture modernization, update/check improvements, and stability through targeted bug fixes and refactors.
August 2025
July 2025
20 Commits • 4 Features
Jul 1, 2025July 2025 MuseScore development delivered user-facing editor enhancements and stability fixes, focusing on reliability, UX improvements, and extensibility. Key outcomes include percussion panel column customization with persistence; an updated update-check flow supporting manual vs automatic checks; File/Publish UI improvements and cloud-save behavior; staff visibility indicators and related UI; and corrected grace-note range deletion and spanner handling with added unit tests. These changes reduce editing friction, prevent regressions, and enable safer, configurable workflows.
July 2025
20 Commits • 4 Features
Jul 1, 2025July 2025 MuseScore development delivered user-facing editor enhancements and stability fixes, focusing on reliability, UX improvements, and extensibility. Key outcomes include percussion panel column customization with persistence; an updated update-check flow supporting manual vs automatic checks; File/Publish UI improvements and cloud-save behavior; staff visibility indicators and related UI; and corrected grace-note range deletion and spanner handling with added unit tests. These changes reduce editing friction, prevent regressions, and enable safer, configurable workflows.
June 2025
23 Commits • 4 Features
Jun 1, 2025June 2025 performance for musescore/MuseScore focused on delivering robust filter capabilities, UI polish, and test coverage to accelerate editing workflows while reducing regression risk. Key work spanned chord/notes filtering enhancements, selection filter reliability improvements, tempo filter bug fixes, and visual/notation refinements, supported by unit tests and a pre-4.4.0 score initialization fix. The month yielded fewer workflow interruptions and sharper UX for complex filtering tasks, with measurable improvements in filter accuracy and editor responsiveness.
23 Commits • 4 Features
Jun 1, 2025June 2025 performance for musescore/MuseScore focused on delivering robust filter capabilities, UI polish, and test coverage to accelerate editing workflows while reducing regression risk. Key work spanned chord/notes filtering enhancements, selection filter reliability improvements, tempo filter bug fixes, and visual/notation refinements, supported by unit tests and a pre-4.4.0 score initialization fix. The month yielded fewer workflow interruptions and sharper UX for complex filtering tasks, with measurable improvements in filter accuracy and editor responsiveness.
June 2025
May 2025
9 Commits • 2 Features
May 1, 2025May 2025 engineering focus centered on delivering higher fidelity engraving interactions, strengthening reliability across core editing operations, and increasing test coverage to prevent regressions. The following items highlight the most impactful work, aligned with business value:
May 2025
9 Commits • 2 Features
May 1, 2025May 2025 engineering focus centered on delivering higher fidelity engraving interactions, strengthening reliability across core editing operations, and increasing test coverage to prevent regressions. The following items highlight the most impactful work, aligned with business value:
April 2025
24 Commits • 7 Features
Apr 1, 2025April 2025 (2025-04) delivered stability, maintainability, and workflow improvements for MuseScore through targeted bug fixes and substantial refactoring. The work focused on UI/input reliability, robust notation handling, and cleaner, test-covered score operations, enabling faster feature delivery and a smoother editing experience for users.
24 Commits • 7 Features
Apr 1, 2025April 2025 (2025-04) delivered stability, maintainability, and workflow improvements for MuseScore through targeted bug fixes and substantial refactoring. The work focused on UI/input reliability, robust notation handling, and cleaner, test-covered score operations, enabling faster feature delivery and a smoother editing experience for users.
April 2025
March 2025
10 Commits • 3 Features
Mar 1, 2025Month: 2025-03. Focused on editor precision, UI stability for percussion features, and aligning nightly builds with the latest release branch. Delivered enhancements to element selection, streamlined percussion panel management, and ensured build pipeline targets 4.5.2 for future releases.
March 2025
10 Commits • 3 Features
Mar 1, 2025Month: 2025-03. Focused on editor precision, UI stability for percussion features, and aligning nightly builds with the latest release branch. Delivered enhancements to element selection, streamlined percussion panel management, and ensured build pipeline targets 4.5.2 for future releases.
February 2025
43 Commits • 9 Features
Feb 1, 2025February 2025 delivered a comprehensive enhancement of the percussion workflow and stabilized the editing experience across notation input, UI, and accessibility. Key progress includes moving to a new percussion panel by default with granular auto-show controls, robust percussion shortcut handling and dispatcher-based note writing, and UI refinements for popups, hover states, and context menus.
43 Commits • 9 Features
Feb 1, 2025February 2025 delivered a comprehensive enhancement of the percussion workflow and stabilized the editing experience across notation input, UI, and accessibility. Key progress includes moving to a new percussion panel by default with granular auto-show controls, robust percussion shortcut handling and dispatcher-based note writing, and UI refinements for popups, hover states, and context menus.
February 2025
January 2025
22 Commits • 7 Features
Jan 1, 2025January 2025 focused on stabilizing and enhancing the Percussion panel in MuseScore (musescore/MuseScore). Delivered UX improvements and robust fixes, improved integration with the dock frame, enhanced keyboard navigation, and a set of refactors to improve maintainability. These changes reduce crashes, improve response after undo/redo, and deliver a more efficient workflow for percussion editing, translating to lower support costs and higher user satisfaction.
January 2025
22 Commits • 7 Features
Jan 1, 2025January 2025 focused on stabilizing and enhancing the Percussion panel in MuseScore (musescore/MuseScore). Delivered UX improvements and robust fixes, improved integration with the dock frame, enhanced keyboard navigation, and a set of refactors to improve maintainability. These changes reduce crashes, improve response after undo/redo, and deliver a more efficient workflow for percussion editing, translating to lower support costs and higher user satisfaction.
December 2024
27 Commits • 7 Features
Dec 1, 2024December 2024 MuseScore — Percussion panel UX, stability, and localization in focus. Delivered keyboard navigation for the percussion panel (toolbar and pad grid) to boost accessibility and editing speed; enhanced notation preview with tooltips/hover states; and implemented UI/interactions refinements, including icon labeling, scrollbar placement, drumset tweaks, and copy changes. Launched percussion preferences with translation context, pad-name terminology (renaming instrument names to pad names), and a pad swap options dialog. Strengthened editing workflow stability with fixes to layout finish, panel mode transitions, and crash prevention on project close, plus a crash fix for deleting staves. Also addressed nightlies reliability by disabling unstable 4.4.4 nightlies and performed targeted code cleanup (remove redundant DEFERs in PercussionPanelModel). Overall, the month delivered measurable business value: improved accessibility and editing efficiency, reduced crash risk, and better internationalization and build reliability.
27 Commits • 7 Features
Dec 1, 2024December 2024 MuseScore — Percussion panel UX, stability, and localization in focus. Delivered keyboard navigation for the percussion panel (toolbar and pad grid) to boost accessibility and editing speed; enhanced notation preview with tooltips/hover states; and implemented UI/interactions refinements, including icon labeling, scrollbar placement, drumset tweaks, and copy changes. Launched percussion preferences with translation context, pad-name terminology (renaming instrument names to pad names), and a pad swap options dialog. Strengthened editing workflow stability with fixes to layout finish, panel mode transitions, and crash prevention on project close, plus a crash fix for deleting staves. Also addressed nightlies reliability by disabling unstable 4.4.4 nightlies and performed targeted code cleanup (remove redundant DEFERs in PercussionPanelModel). Overall, the month delivered measurable business value: improved accessibility and editing efficiency, reduced crash risk, and better internationalization and build reliability.
December 2024
November 2024
17 Commits • 5 Features
Nov 1, 2024Month: 2024-11 — Delivered a polished set of Percussion Panel improvements and UI/UX refinements in MuseScore, driving reliability, usability, and asset discovery. Key work centered on the percussion panel, engraving/notation rendering, and MuseHub integration, with broad internal refactors to improve maintainability. The work reduces user friction in percussion workflow, preserves data integrity during drumset changes, and standardizes terminology across the UI, enabling faster feature delivery and higher user satisfaction. Overall, the updates deliver clear business value: faster percussion setup, safer editing workflows, richer sound/resource access, and a cleaner codebase for future enhancements. Technologies/skills demonstrated include C++/Qt UI work, rendering pipeline enhancements for engraving/notation, architectural refactors and constants cleanup, and feature-driven UI integration with MuseHub and tools panel.
November 2024
17 Commits • 5 Features
Nov 1, 2024Month: 2024-11 — Delivered a polished set of Percussion Panel improvements and UI/UX refinements in MuseScore, driving reliability, usability, and asset discovery. Key work centered on the percussion panel, engraving/notation rendering, and MuseHub integration, with broad internal refactors to improve maintainability. The work reduces user friction in percussion workflow, preserves data integrity during drumset changes, and standardizes terminology across the UI, enabling faster feature delivery and higher user satisfaction. Overall, the updates deliver clear business value: faster percussion setup, safer editing workflows, richer sound/resource access, and a cleaner codebase for future enhancements. Technologies/skills demonstrated include C++/Qt UI work, rendering pipeline enhancements for engraving/notation, architectural refactors and constants cleanup, and feature-driven UI integration with MuseHub and tools panel.
October 2024
2 Commits • 1 Features
Oct 1, 2024Month: 2024-10 – MuseScore (musescore/MuseScore) monthly summary focusing on key accomplishments, business value, and technical achievements. Key features delivered: - Horizontal layout navigation improvements: Block navigation into vertical frames in horizontal mode and automatically deselect vertical frames when switching to horizontal. These changes improve navigation accuracy and consistency of the score display in horizontal view. Major bugs fixed: - No explicit bugs fixed documented for this month in the provided data. Overall impact and accomplishments: - Enhanced user experience for horizontal layout users by preventing invalid navigations and maintaining consistent score rendering. - Reduced user confusion during layout transitions, contributing to faster workflows and more predictable behavior across views. Technologies/skills demonstrated: - UI/navigation logic changes in a C++/Qt codebase. - Clear commit history and incremental changes with focused scope. - Attention to cross-view consistency and usability in complex score displays.
2 Commits • 1 Features
Oct 1, 2024Month: 2024-10 – MuseScore (musescore/MuseScore) monthly summary focusing on key accomplishments, business value, and technical achievements. Key features delivered: - Horizontal layout navigation improvements: Block navigation into vertical frames in horizontal mode and automatically deselect vertical frames when switching to horizontal. These changes improve navigation accuracy and consistency of the score display in horizontal view. Major bugs fixed: - No explicit bugs fixed documented for this month in the provided data. Overall impact and accomplishments: - Enhanced user experience for horizontal layout users by preventing invalid navigations and maintaining consistent score rendering. - Reduced user confusion during layout transitions, contributing to faster workflows and more predictable behavior across views. Technologies/skills demonstrated: - UI/navigation logic changes in a C++/Qt codebase. - Clear commit history and incremental changes with focused scope. - Attention to cross-view consistency and usability in complex score displays.
October 2024
Activity
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Quality Metrics
Correctness88.0%
Maintainability87.6%
Architecture83.4%
Performance82.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++CMakeJavaScriptPythonQMLQtXMLYAML
Technical Skills
API DesignAccessibilityAlgorithm DesignAlgorithm ImprovementApplication DevelopmentAsynchronous ProgrammingAudio EngineeringAudio IntegrationAudio PlaybackBackward CompatibilityBraille InputBug FixBug FixingBuild AutomationBuild System Configuration
Repositories Contributed To
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