Clearspeech audio line box

NCT Clearspeech evaluation module: NCT Group Inc., a company which provides sophisticated noise reduction solutions, offers some preconfigured hardware-/software modules for easy development issues. I've found those boards on eBay, offered for 4 UK-Pounds each. In fact these boards on eBay were Clearspeech Mic boards, just missing the DIP-switch to select the mode and the noise reduction on-off-switch. NCT has a data sheet on the web: NCT Clearspeech Datasheet Another difference is my board is featuring an ADSP-2186 processor, while the NCT description is showing the ADSP-2184. The board I got was preconfigured for Mic-input, as you can see on the detail foto: The left contact of the missing DIP-switch was bridged by a 0 ohm resistor. I removed the bridge and inserted a 4-pole DIP-switch like it is in the data sheet: By the mode select the board can be switched for mic input, amplified mic and for line input. The board is still very sensitive to input level, but with adjusted input level it works fine. The board is using the ADSP-2186 processor, this is a 16-bit 40 MIPS processor with 25 ns cycle instruction time, so it is clearly for real-time processing.

Back to my SE 6861 page

Last update: 26 - August - 2007