The program works pretty well, but it consumes too much energy when in the background. I once forgot to shut down the app and overnight it completely drained my battery.

Sample Scenario:
Settings only change is automatically identify song on startup on (Not sure if related)

- Start Application
- Stop identifying song
- Click the history tab
- Swipe from left, right, down (not shutting down) (in the multitask menu you'll now see Soundwave with it's icon semi-transparent over the actual content)
- Lock the phone

- Check the Battery Usage app after a while and see your Avg Idle Consumption grow from ~8mA to ~48mA with Top Energy Consumers Soundwave

Hope you can fix this in a newer version, I love the application, but don't want to risk an empty battery when I forget to shutdown.