{
  "added_at": "2026-11-08",
  "additional_evidence_urls": [
    "https://github.com/ParkWardRR/fiio-ja11-jcally-jm12-moondropkt02-kt02h20-dac-amp-control/blob/c59b923dc46a4666af2e7ae4b898256c5d92a293/docs/PROTOCOL.md"
  ],
  "category": "reconstruction-cases",
  "class": "hardware",
  "description_en": "ktctl reconstructs the FiiO JA11 runtime USB control protocol in a Rust CLI and TUI for five-band PEQ, presets and gain. Its protocol notes specify framing, CRC-8/MAXIM and command bytes derived from Android app analysis and device probing. The author reports a successful read, write and save round trip on a JA11.",
  "description_zh": "ktctl 用 Rust CLI 和 TUI 重建 FiiO JA11 的运行时 USB 控制协议，可调整五段 PEQ、预设和增益。协议文档记录了从 Android 应用分析及设备探测获得的帧格式、CRC-8/MAXIM 和命令字节。作者报告已在 JA11 上完成读取、写入和保存的往返验证。",
  "entry_url": "https://awesomerea.org/resources/ktctl-ja11-case/",
  "entry_url_zh": "https://awesomerea.org/zh/resources/ktctl-ja11-case/",
  "evidence_class": 2,
  "evidence_status": "observed",
  "evidence_url": "https://github.com/ParkWardRR/fiio-ja11-jcally-jm12-moondropkt02-kt02h20-dac-amp-control/blob/c59b923dc46a4666af2e7ae4b898256c5d92a293/README.md",
  "group": "cases",
  "id": "ktctl-ja11-case",
  "json_url": "https://awesomerea.org/resources/ktctl-ja11-case/record.json",
  "kind": "case-study",
  "markdown_url": "https://awesomerea.org/resources/ktctl-ja11-case/index.md",
  "markdown_url_zh": "https://awesomerea.org/zh/resources/ktctl-ja11-case/index.md",
  "name": "ktctl: reconstructing FiiO JA11 USB equalizer control",
  "name_zh": "ktctl：重建 FiiO JA11 的 USB 均衡器控制",
  "record_type": "resource",
  "relationship": "independent-reconstruction",
  "requirement_facets": [
    "prerequisites",
    "limits",
    "license"
  ],
  "requirements": [
    "Rust 1.75+ and macOS or Linux; USB access requires a JA11 or compatible device.",
    "JCALLY JM12 and Moondrop KT02H20 compatibility remains unconfirmed; master-gain encoding lacks audio confirmation.",
    "Blue Oak Model License 1.0.0."
  ],
  "requirements_zh": [
    "需要 Rust 1.75+ 和 macOS 或 Linux；USB 操作需要 JA11 或兼容设备。",
    "JCALLY JM12 和 Moondrop KT02H20 的兼容性尚未确认；主增益编码尚未经过听音验证。",
    "采用 Blue Oak Model License 1.0.0。"
  ],
  "scope": "unknown",
  "targets": [
    "protocol"
  ],
  "url": "https://github.com/ParkWardRR/fiio-ja11-jcally-jm12-moondropkt02-kt02h20-dac-amp-control",
  "verification": "source-reviewed",
  "verified_at": "2026-11-06"
}