價格：免費
檔案大小：25.2 MB
版本需求：需要 iOS 10.3 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Display a piano keyboard to play and visualize the musical notes frequency tones relative to the selected reference A note.
Reference A Frequencies: 415 Hz, 432 Hz, 435 Hz, 440 Hz, 444 Hz, 445 Hz.
ToneTuna can be used to tune stringed instruments by ear such as guitars, violas, and with a bit more of practice and patience, an acoustic piano.
支援平台：iPhone, iPad