The LR/MS Player allows you to select an audio file and play back left, right, mid, and side audio channels. It also lets you play the selected channel at different speeds and gives you an easy way to restart from any timestamp you specify.
Over the years, I have transcribed many songs, either to learn how to play them, or just to pick them apart and better understand them. I used to use Pro Tools to accomplish the same results as this tool. That always felt really overkill, and I had to be in front of my recording rig to do it. So I built this to make things simpler for myself. Hopefully someone else can get some use out of it too.