{
  "added_at": "2026-11-09",
  "additional_evidence_urls": [
    "https://github.com/drewmerc302/valeton-gp50/blob/47b2b583bc9b2ba8936fe247ae29af790c6dc6a3/re/REFIT_FINDINGS.md",
    "https://github.com/drewmerc302/valeton-gp50/blob/47b2b583bc9b2ba8936fe247ae29af790c6dc6a3/LICENSE"
  ],
  "category": "reconstruction-cases",
  "class": "hardware",
  "description_en": "Valeton GP-50 Editor controls GP-50 and GP-5 guitar pedals through a reconstructed MIDI SysEx protocol. Its browser interface uses WebMIDI to inspect and edit presets, reorder blocks, rename slots and convert GP-5 and GP-50 .prst files. The repository also includes protocol tooling and findings about the vendor's NAM-to-SnapTone conversion path.",
  "description_zh": "Valeton GP-50 Editor 通过重建的 MIDI SysEx 协议控制 GP-50 和 GP-5 吉他效果器。浏览器界面用 WebMIDI 查看和编辑预设、调整效果块顺序、重命名槽位，并转换两种设备的 .prst 文件；仓库另有协议研究工具及 NAM 转 SnapTone 流程的分析记录。",
  "entry_url": "https://awesomerea.org/resources/valeton-gp50-editor-case/",
  "entry_url_zh": "https://awesomerea.org/zh/resources/valeton-gp50-editor-case/",
  "evidence_class": 2,
  "evidence_status": "observed",
  "evidence_url": "https://github.com/drewmerc302/valeton-gp50/blob/47b2b583bc9b2ba8936fe247ae29af790c6dc6a3/README.md",
  "group": "cases",
  "id": "valeton-gp50-editor-case",
  "json_url": "https://awesomerea.org/resources/valeton-gp50-editor-case/record.json",
  "kind": "case-study",
  "markdown_url": "https://awesomerea.org/resources/valeton-gp50-editor-case/index.md",
  "markdown_url_zh": "https://awesomerea.org/zh/resources/valeton-gp50-editor-case/index.md",
  "name": "Valeton GP-50 Editor: live preset editing over reconstructed SysEx",
  "name_zh": "Valeton GP-50 Editor：通过重建的 SysEx 协议实时编辑预设",
  "record_type": "resource",
  "relationship": "independent-reconstruction",
  "requirement_facets": [
    "prerequisites",
    "limits",
    "testing",
    "license"
  ],
  "requirements": [
    "A GP-50 or GP-5 connected by USB and a WebMIDI-capable Chrome or Edge browser are required for live editing.",
    "Chrome 152 has a documented SysEx framing regression; the source recommends Chrome 153 or newer.",
    "The author no longer owns test hardware, so later device I/O changes are checked against tests rather than a live pedal.",
    "MIT license."
  ],
  "requirements_zh": [
    "实时编辑需要通过 USB 连接的 GP-50 或 GP-5，以及支持 WebMIDI 的 Chrome 或 Edge。",
    "文档指出 Chrome 152 存在 SysEx 帧处理回归问题，建议使用 Chrome 153 或更新版本。",
    "作者已无测试设备，后续设备读写改动依靠测试套件检查，而非实机复测。",
    "MIT 许可证。"
  ],
  "scope": "unknown",
  "targets": [
    "protocol"
  ],
  "url": "https://github.com/drewmerc302/valeton-gp50",
  "verification": "source-reviewed",
  "verified_at": "2026-11-06"
}