With Share files app is easy to select and transfer files through applications
You just need to select the file you want to share and the way or application to transfer the selected file to other devices whether it's Whatsapp, Instagram, Twitter, Google+, Gmail, Bluetooth, ShareBox or any other way or app that allows sharing the selected file. That's easy!
Now you may more easily select and share songs and audio files if you install the app "Audio Player - Music play" that you may find at https://play.google.com/store/apps/details?id=com.b6dev.audioplayer