I am saddened to bring you the news of Mark Walsen's passing.
Mark was a true genius and pioneer in notation software. He combined his passion for music with his 30+ years of experience in software development. Prior to founding notation.com, he worked many years at Microsoft and was their first program manager for the Windows Software Development Kit (SDK).
Mark did graphical sequencing in notation years before anyone else did. His vision was to make music software that every musician could use. He was one of the nice people I've met and one of my heroes.
The world has lost a great man and he will be missed. Our condolences to Mark's family.
In deep sympathy,