I have a digital multitrack (AW16), but find myself in need of developing song ideas first before dedicating the time to record. For this task, the AW16 is overkill. I'm thinking something small and simple to both record & recall. So...I'm curious. What's everyone's using for capturing song ideas quickly on the fly and why? Digital voice recorder? Cassette? Micro-multi track? iPod w/mic attachment?