Avid Audio

The company began as a project to raise money for the founders' band, selling EPROM chips for drum machines.

In 2010, these various editions of Pro Tools were mostly abandoned and it is now being sold by Avid as a singular software product, with the level of functionality dependent on the hardware chosen by the user.

Digidesign Software was developed by UC Berkeley graduate Peter Gotcher and his friend Evan Brooks, both majors in electrical engineering and computer science.

The SDII (Sound Designer II, sometimes seen abbreviated as SD2) is a monophonic/stereophonic audio file format, originally developed by Digidesign for their Macintosh-based recording/editing products.

Although the software had the possibility to do far more, it was limited by the hard drive technology, which was used to stream the audio and allow for the non-destructive editing that Sound Tools offered.

Digidesign continued to improve Pro Tools, adding a sequencer and more tracks, with the system offering recording at 16-bit and 44.1 kHz.