DMP'25 Week-09 Update by Anvita Prasad (#366)

* Add Week 09 blog post

* docs: add extra trailing space to force Markdown line break in week09 post

Author: AnvitaPrasad

src/constants/MarkdownFiles/posts/dmp-25-AnvitaPrasad-week09.md

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+---
+title: "DMP '25 Week 09 Update by Anvita Prasad"
+excerpt: "Improve Synth and Sample Feature for Music Blocks"
+category: "DEVELOPER NEWS"
+date: "2025-08-03"
+slug: "2025-08-03-DMP-25-AnvitaPrasad-week09"
+author: "@/constants/MarkdownFiles/authors/anvita-prasad.md"
+tags: "dmp25,sugarlabs,week09,AnvitaPrasad"
+image: "assets/Images/c4gt_DMP.png"
+---
+
+<!-- markdownlint-disable -->
+
+# Week 09 Progress Report by Anvita Prasad
+
+**Project:** [Music Blocks - Improve Synth and Sample Features](https://github.com/sugarlabs/musicblocks/issues/4539)  
+**Mentors:** [Walter Bender](https://github.com/walterbender)  
+**Assisting Mentors:** [Devin Ulibarri](https://github.com/pikurasa)  
+**Reporting Period:** 2025-07-28 - 2025-08-03  
+
+---
+
+## Goals for This Week
+- **Goal 1:** Extend multi-sample system to violin with string-based sampling strategy
+- **Goal 2:** Implement codebase restructuring and proper Git workflow management
+- **Goal 3:** Create comprehensive testing framework for violin multi-sample system
+
+---
+
+## This Week's Achievements
+
+1. **Violin Multi-Sample System Implementation**
+   - Created violin_multi.js with 6 key violin samples (G3, D4, A4, E5, A5, E6)
+   - Implemented string-based sampling strategy optimized for violin timbre characteristics
+   - Successfully integrated violin multi-sample into existing system architecture
+
+2. **Codebase Organization and Git Workflow**
+   - Created dedicated multi-sample-feature branch to separate work from tuner widget development
+   - Successfully resolved merge conflicts when integrating with latest master branch
+
+3. **Enhanced Testing Framework Development**
+   - Built violin-multi-direct-test.js for comprehensive violin sample validation
+   - Enhanced sample verification system to handle different sample types
+   - Implemented thorough boundary testing for smooth transitions between samples
+
+4. **Technical Architecture Improvements**
+   - Ensured consistent sample file syntax across piano and violin implementations
+   - Fine-tuned MIDI note range boundaries for violin-specific timbre characteristics
+   - Implemented robust error handling and comprehensive logging capabilities
+
+---
+
+## Challenges & How I Overcame Them
+
+- **Challenge:** Implementing violin-specific sample selection logic while maintaining system consistency  
+  **Solution:** Adapted piano's octave-based approach to violin's string-based strategy with optimized MIDI boundaries
+
+- **Challenge:** Finding high-quality violin samples for different articulations 
+ - **Challenge:** Finding high-quality violin samples for different articulations  
+  **Solution:** Still continuing to search for better solutions to ensure consistent sound quality across all violin samples
+
+- **Challenge:** Resolving complex merge conflicts when integrating multi-sample code with master branch  
+  **Solution:** Manually resolved conflicts by carefully selecting appropriate changes and maintaining code integrity
+
+---
+
+## Key Learnings
+- Enhanced understanding of string instrument timbre characteristics and optimal sampling strategies
+
+---
+
+## Next Week's Roadmap
+- Implement multi-sample system for additional string instruments (double bass, cello)
+- Develop advanced articulation detection and sample selection algorithms
+- Optimize performance and memory usage for large multi-sample libraries
+- Write Week 10 blog post summarizing progress and learnings
+
+---
+
+## Resources & References
+- **Pull Request:** [Initial multi-sample implementation](https://github.com/sugarlabs/musicblocks/pull/4738)
+- **String Instrument Acoustics:** [Violin String Characteristics and Timbre](https://www.violinist.com/blog/laurie/20145/28087/)
+
+---
+
+## Acknowledgments
+Thank you to my mentors, the Sugar Labs community, and fellow contributors for ongoing support.
+
+---