For anyone who has Sound Forge 6 or higher, you can import most ASF audio and video files to do editing and converting to different formats. For audio, you can ASF audio to MP3, WAV, and many more. For ASF video, you can convert to AVI and others.

However, not all ASF file will open. In this case, if it's a ASF video file, you can use the latest version of TMPGEnc.

This is not a guide by sharing my discoveries. Feedbacks are welcome. Thanks.

Minh