This application is a reproducer of songs to date never produced and is the only one that allows you to have realistic songs without overlaps of track or ambient sounds that disturb the reproduction.
In particular, the traces have been processed in order to make them clean and realistic.
Another important detail is the duration of the single tracks that works in continuous loop without interruptions in order to have perpetual songs that last for hours.
The best reference for birdwatching ever produced.