A free program for Android, by oshiy.

Media Volume Control is a handy app for Android devices that lets you easily manage the volume of your audio files. It allows you to quickly increase or decrease the audio volume by a specified amount, in either a continuous or step-wise fashion.

The app is a simple and intuitive tool that is easy to use. All you have to do is select the audio file that you want to increase or decrease the volume, select the desired volume level, and then press the play button. You can also choose to increase or decrease the volume by a specific amount in a continuous fashion.

The app supports the Android standard audio file format, as well as MP3, WAV, FLAC, OGG, and more. It also supports the MP4, MOV, and AVI file formats, as well as the MPEG, MPEG4, and MOV video formats.

The app is very easy to use, and it is designed to work with the Android operating system. It is compatible with Android devices that use the Google Android operating system.