Test your speakers and microphones with specialized sound frequencies. Measure sound in decibels and Hz to assess speaker quality and detect damage. Identify potential microphone issues.
钢琴巴士 by Shanghai Music Publishing House Co., Ltd.





15+ similar apps compared and reviewed
Whether you want more options like Chord Transposer or a completely different take on the same concept, our curated list of 15+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.










Test your speakers and microphones with specialized sound frequencies. Measure sound in decibels and Hz to assess speaker quality and detect damage. Identify potential microphone issues.


Create your own virtual handpan by customizing each note. Discover scales, chords, and learn to play songs on your unique instrument.


Learn guitar, bass, or ukulele fretboards visually. Instantly find notes, visualize chords, and explore scales in any key or tuning. Offers a distraction-free learning experience with clear diagrams and audio playback.


This app uses AI to remove vocals and instruments from songs and videos. It also allows for audio extraction, conversion between formats, and precise audio trimming. Create karaoke tracks, remix music, and edit audio files with ease.


Easily reverse audio from videos or recordings. Extract audio, play, favorite, and share your creations. Save directly to your files or send as audio messages.


This MIDI effect app for Audiobus 3 lets you transpose notes by octaves and half-tones. It's useful for playing external keyboards in different keys or creating harmonies. The app is free to use.


Explore countless ways to play chords on your guitar, ukulele, and other stringed instruments. Discover classic shapes, variations, and even reverse lookup unknown chords. Create and export custom chord sheets with support for alternate tunings.


Identify chord names by their shape on a guitar fretboard. Quickly name chords you're playing or discover new ones by adjusting finger positions. Ideal for musicians who need to name chords for sharing or understanding song structures.


Develop your musical ear with interactive exercises for intervals, chords, scales, and melodies. Personalize your training to focus on specific areas and track your progress. Ideal for musicians of all levels, from beginners to advanced.