Cakewalk Pro Audio 9 (CPA9) was the final flagship version before the series transitioned into the brand. It is celebrated for being one of the first Windows-based sequencers to offer high-quality 24-bit/96kHz audio recording alongside its industry-leading MIDI tools. Release Date: 1999 Developer: Twelve Tone Systems (later Cakewalk, Inc.) Key Features:

CPA9 was originally designed for 16-bit and 32-bit environments like Windows 98 and NT. Running it on Windows 10 or 11 requires specific workarounds: Cakewalk installation issues on Windows 11? - Facebook

For those who have lost their original media, the Cakewalk Pro Audio 9 CD ISO is hosted by the Internet Archive for historical preservation. Running CPA9 on Modern Windows (10/11)

Early support for saving directly to MP3 and Windows Media formats. Downloading and Installing CPA9 (Legacy Access)