It also has 64 GPIO expansion pins (including 40 for connection to a Raspberry Pi) and 18 Everloop LEDs. The Matrix Voice dev board sports seven MEMS microphones connected to a Xilinx Spartan6 FPGA ( field-programmable gate array) and 64 MB of SDRAM. ![]() ![]() And following a successful crowdfunding effort on Indiegogo last year, the Matrix Voice is now on general release. Matrix Labs has come to the rescue with a Raspberry Pi-compatible Internet-of-Things development board with built-in microphones that can bring custom voice recognition smarts to any maker project. Holding basic conversations with smartphones and wireless speakers is now fairly commonplace, but tinkerers and makers who want to create their own communicative objects can feel a little restricted by what Amazon, Apple and Google allow them to do.
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