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.





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Whether you want more options like Simplecorder or a completely different take on the same concept, our curated list of 13+ 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.


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This app acts as a host for instrumental sample sets, allowing users to play them via connected MIDI keyboards on iOS and macOS devices. Users must install their own instruments to utilize the functionality.


This audio effect plugin creates the illusion of an overdubbed track using a combination of short delay, stereo processing, and modulation. It's designed to enhance instruments like guitar and vocals by adding depth and width to your mix.