Cakewalk, developer of the leading music and sound software for Windows, today announces the availability of a fully native 64-bit version of SONAR 4 Producer Edition, the definitive audio production environment on the Windows platform. The x64 Technology Preview version of SONAR 4 includes the entire application, along with a collection of additional DirectX effects, synths, and samplers to spotlight the advantages of music production in a 64-bit processing environment. The SONAR x64 Technology Preview is now available for free download from the Cakewalk web site at www.cakewalk.com/x64. A free pre-release beta version Microsoft® Windows® XP Professional x64 Edition is available for download at www.microsoft.com/windowsxp/64bit. Cakewalk's implementation extends the amount of RAM available for music production on the PC to 1 terabyte (1024 GB), well beyond the current 2 GB limit offered by today's 32-bit applications. This provides users with nearly unlimited potential for working with RAM intensive projects that make extensive use of samplers and numerous audio loops and tracks. SONAR x64 Technology Preview provides users with the ability to load entire, large sample banks, libraries, and audio clips into RAM, thereby eliminating the latency introduced by disk streaming. Additionally, future versions of SONAR will offer the highest resolution mix engine with a fidelity exceeding that of the most expensive professional audio tools available in the market today.