Importing audio files from SD RAM into Cubasis 2 on an iPad

Is it possible to import audio files (WAV and/or MP3) into Cubasis 2 on an iPad Air 2 using Apple’s Lightning to SD Card Camera Reader? As the cable title promises, the iPad recognizes photos from a digital camera. However, it doesn’t seem to recognize audio files on an SD Card from an external digital audio recorder.

Apple suggested some apps may be coded to do the recognition for the device, but it is not available as a supported feature in the iOS.

Any help would be appreciated.