Brief update here. We now have a 2D mapping tool that works within your browser. It's a work in progress, but is already very functional. You can check out the latest stable build at Tanner's site which is: http://mapit.tannern.com More polish and permanent hosting coming soon. We also have a working MIDI->beatmap converter that we'll be adding to the tool soon. If you're eager to convert your MIDI tracks to Chop It, just hit me (Techboy) up on our Discord (https://discord.gg/Yq3dzm2) and I'll help you convert. Thanks!