I need to merge several audio files into one, while the Union may be a file on the file.
Example: the user begins recording a new sound, press to select the desired sounds, while there is a counting of time, in seconds, that is, if the user selects a sound for 6 seconds and 2 seconds choose a sound for 4 seconds the two sounds must lie on top of each other.
In the end, I will have to remain on the device one sound with any extension (mp3, ogg, wav) to request any information in no not asking for ready-made codes even examples, although literature examples, at least not in time guys.