4.1.5 Configuring the CSP Device Channel Using ec_setparm( )

Configure your CSP device channel to suit your specific purpose using ec_setparm( ).

Several parameters are available to define values such as:

• tap length of echo canceller (48 taps by default for SpringWare boards; 128 taps for DM3)
• voice-activated record (on by default)
• barge-in (off by default)
• non-linear processing (NLP, on by default; must be turned off for ASR applications)
• other VAD parameters such as the threshold of energy that is considered significant during prompt play and after the prompt has terminated

For more information, see Section5.1, Voice Activity Detector Operating Modes, Chapter 6, Buffers and Data Flow, Section1.5, CSP Support on SpringWare Versus DM3 Boards, and the Continuous Speech Processing API Library Reference.

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