reddit · SideProject · 11-02 17:50 56 分 ← 返回列表

I built an iPhone piano tuner around instrument-specific stretch curves

Sharing a fairly niche project: Tempera, my acoustic piano tuner for iPhone. The interesting part is the tuning target. A piano's stiff strings have overtones that aren't exact multiples of the fundamental, so tuning involves a stretch curve across the keyboard. Tempera samples the instrument to build a piano-specific curve, then gives you a live strobe and cents display while tuning. It also keeps separate piano profiles and exports PDF tuning reports. It's aimed at people who tune piano

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痛点：钢琴调律需要针对每台琴的张力曲线（stretch curve）做个性化定音，但现有手机调音器多为通用十二平均律工具，缺少按具体乐器采样建模、多琴档案管理与专业调律报告导出

目标用户：职业钢琴调律师、正在跟老师学调律的学徒、以及琴行/音乐院校的钢琴维护人员

证据：Basic live tuning has a free 10-minute preview. Continued tuning and the advanced tools are paid: US $9.99/month, $19.99/year or $29.99 lifetime. / It's aimed at people who tune pianos or are learning that skill with an instructor.

变现：订阅制：月付 $9.99、年付 $19.99，终身买断 $29.99；免费层用 10 分钟试用额度限制，专业功能（多琴档案、PDF 调律报告导出）作为付费解锁点；可加机构版（琴行、音乐院校）批量授权

MVP：2 周 MVP：用 iOS 麦克风采集单音并做 FFT/自相关测频，先做“人工采样 12 个基准音 → 线性插值生成简单 stretch 曲线”的简化版，提供 cents 偏差数字 + 简单指针式显示（不做完整 strobe），本地存储多台钢琴档案，导出 PDF 报告模板。核心差异化放在“按琴采样建档”而非音准精度本身。

竞品：Tunelab、PianoMeter、Verituner、Easy Piano Tuner、Entropy Piano Tuner

摘要：作者在 r/SideProject 发布 iPhone 钢琴调律 App「Tempera」，核心是按具体钢琴采样生成 stretch curve（因钢琴弦的非谐性，泛音不是基频整数倍），并提供实时 strobe、cents 显示、多琴档案和 PDF 调律报告。定价为免费 10 分钟试用，之后 $9.99/月、$19.99/年或 $29.99 终身，需 iOS 18+。帖子本身是求反馈，未披露下载量或收入，也没有第三方付费意愿的佐证。