I can't go through even a few minutes with out some sort of audio stimulation. If I'm not listening to music on a radio, there's a song in my head. Music is a major part of my life. So why shouldn't it be part of my afterlife. Well, you can take it with you!
Introducing The CataCombo Sound System by Pause. It's a coffin with a built in sound system that will continuously play a pre designated digital playlist. The inside of the casket comes complete with one set of speakers, while "the living" can listen to above ground speakers. That way they can enjoy the music to which your soul is presumably listening. A digital headstone shows what song is playing and your loved ones can add songs in your eternal rotation.
Say, for example, you've been dead for ten years and the next John Lennon comes along. Instead of your family saying "Gee, Dad would have really liked this singer." They can download it, six feet down, and sit right there at your grave and groove along with your spirit.
You can also hook up your I Heart Radio app and allow the continuous streaming of the dearly-departed's favorite radio station. You may want to start laying out your designated playlist now, make your wishes known and as set aside the funds to make this "JukeBox Of The Great Beyond" happen. You'll need $30,000!