Traktor Pro is great software with a disgusting amount of MIDI custom features like the modifier. I'm working on a Custom MIDI Mapper for the DN-HC4500 and Traktor Pro. . .
• ASIO4ALL: Use your internal sound card • MP3Gain: Same Volume for all songs • CDex: Convert CD's to MP3 • MPTrim: Remove, fade or add silence • WinMP3Packer: Convert VBR to CBR • Foobar2000: Great Playback Software