How to download mp3 files and sync with default music player in Android using ionic framework?

I am using ionic framwork with $cordovaFileTransfer plugin to download mp3 files from my server to Android device. When my mp3 files are downloaded from mobile Chrome browser, those files are automatically synced with default music player. But when I am downloading with ionic app, it is not syncing.

I am saving the files in the same Download directory in which even the Chrome browser is saving. If I click on individual files using file explorer, they are playing normally.