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Osplay is an application for Android that supports slowing down or speeding up MP3s or Oggs. It is primarily intended for playing audiobooks. Podcasts and music are supported, but are not the focus; specifically, podcasts are not managed by Osplay. The best way to experience Osplay is to download it using either of the QR codes here.

All formats that Android supports can be played in Osplay (this is currently AAC, MP3, Ogg, and WAV), but only MP3s and Oggs can be sped up or slowed down.

Known Limitations

Extra Limitations of the Trial Version

This is the main control screen. It provides controls typical of an audiobook player, including add bookmark, view bookmarks, and view history. Osplay supports using an external device, such as a Bluetooth headset, to navigate in a file, and can run in the background.

Tracks automatically resume the last time they were paused, including when you restart the program.

Osplay supports speeding up or slowing down MP3s or Oggs. Recommended values are from 0.6 to 2.0, with more powerful devices able to change the speed more drastically more reliably.

The media browser lets you filter by track title, album, or artist. You can load an entire artist's discography or a single album as easily as loading a single track, which makes listening to audiobooks split among multiple files simple.

Use bookmarks to return to favorite parts of a file.