What is the Speed Change Music Player: slow without flapping application, how does it work?

According to the introduction of mitsu3ma, Speed Change Music Player: slow without flapping is a Music & Audio app on the Android platform. There is currently a 1.0.17 version released on Jul 10, 2017, you can see the details below.

Speed Change Music Player, made in Japan, has good sound with slow speed playing.
No flapping sound with slow playback speed provides you with good listening, speaking, shadowing, dictation training and music practice.
Furthermore, you can skip silence and repeat with picking up the tempo gradually and automatically.

* Language
【recommended for those who wants to ...】
・play audio files slowly to listen high speed speaking and take dictation.
・improve listening and speaking skills by "shadowing" with tempo up repeating
・concentrate on listening and speaking without flapping sound.
・skip silence automatically to learn efficiently by "listening", "shadowing" and "speaking".
・save and load a lot of AB repeat bookmarks for speaking training.
・improve listening skills by "high speed training".

* Music
【recommended for those who wants to ...】
・listen very slow audio for music dictation.
・concentrate on music dictation without flapping sound.
・repeat a same phrase with tempo up for ear training and guitar practice.
・skip silence automatically to use more time on guitar training and music dictation.
・use musical instruments practice lists by saving and loading a lot of AB repeat bookmarks.
・improve music dictation skill by "high speed training".

【features (free)】
・speed controller：0.1 slow ～4.0 fast
・faster sound at every repeat
・save and load AB repeat bookmarks.
・skipping silence to save your precious time

【audio formats】
・mp3
・wma
...more than 100 formats

What's new in version 1.0.17 ver.1.0.17: fix a reported bug
ver.1.0.16: fix a reported bug on AB repeat
ver.1.0.15: added delete button on ABlist