DSP Gateway consists of Linux Driver and the DSP Firmware. They are responsible for hardware settings, interrupt handlings, and communications in between. With help from DSP Gateway, DSP enhanced applications for Linux can be developed without low-level hardware knowledge. From ARM side, DSP can be reached through DSP device file under /dev directory on Linux file system. On DSP side, tasks can easily be synchronized with ARM side by using the API provided by DSP Gateway. Of course, we could prepare a library sitting between ARM Applications" and the "Linux DSP Driver" that hides DSP from programmers, so that DSP enhanced applications can be easily developed without even being aware of DSP upon using this library.