This music player can control speed/pitch in real-time WITHOUT importing binary data of the song into this app.
Speed : 50 - 200% (up to 12.5 - 800%)
Pitch : ±1 octave

Let's use this for learning music or voice by ear.

Main features :
- Register the songs in the music library to the playlist in this application and play the songs in the playlist. (The song data is NOT imported into the application.)
- Time stretch : This function can change the playback speed without changing the pitch. (50 - 200%)
(It can be extended up to 12.5 - 800% by In-App Purchase.)
- Pitch shift : This function can change the pitch without changing the playback speed. (± 1 octave)
- Center cancel : This function can reduce the volume of the center for stereo files.
- Repeat playback : repeat off, all songs repeat, 1 song repeat.
- Quick jump (back, forward) : Select jump interval from 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30 sec.
- Switch songs (switch one song at a time based on the order of the playlist in the app)
- Sort songs (Artist, Title, Recently Added, Formerly Added)
- Supports Auto-Lock ON/OFF.
- Supports displaying the player on the lock screen.


If you'd like to try the features, such as more smooth speed/pitch conversion and equalizer, please use the following apps.
- Audio Unit Player
- Pitch Shift / EQ / AUv3
- Time Stretch / EQ / AUv3


[Note]
This app can't read songs of the following formats.
- Songs from iCloud, iTunes Match
- Songs that are protected by digital copyright (DRM)