The free Audiophile Music Player app for the iPad is an attractive and great-sounding way to improve iPad audio if you are connected to external speakers or headphones. Speakers can be the plug-in type, or connected via Bluetooth or AirPlay.
Like some of the other audio apps I've reviewed, most recently one for the iPhone for use with headphones, Audiophile processes music digitally and significantly enhances the sound, especially for smaller speakers and headphones.
The app sees your iTunes content, and allows you to play tracks and albums, or create playlists. You can also use iTunes file sharing for music not on your iPad. The app supports ALAC, WAV, AIFF, MP3 and AAC/M4A formats.