ASD file is an Ableton Warp Analysis File. Ableton warp analysis file contains specific information about analyzed audio data such as e.g. warp marker positions, pitch, etc. Ableton Live is a loop-based software music sequencer and digital audio workstation for OS X and Windows.
This condition aggravates with cold exposure. Exposure to cold abnormally reduces blood circulation causing the skin to become pale, waxy-white or purple. The disorder is sometimes called white finger, wax finger or dead finger.. Raynaud's phenomenon has many different causes including workplace exposures.
I would suggest, however, that you consult a medical professional about this. Whenever the nails (toes or fingers) turn purple, it's usually a sign of decreased oxygen supply, often due to decreased blood flow. If this is happening to you on just one side, it could indicate a circulation problem in your leg. And that is definitely worth getting checked out.