Hi everyone, First post to the group here, just want to say firstly thanks to all the Faust developers for all the interesting DSP developments and ongoing work, and also to post about a new open source ESP32 development board for audio that some people may be interested in. Details are below, if anyone has any questions or feedback please reply and let me know, currently it is in final prototype stage and I hope to make it available in a few months;
ESP32 Pico D4 Chip (silicon rev1), 4MB Additional PSRAM, 3D Antenna, WM8978 Audio Codec. Audio Line In on stereo 3.5mm connector. Audio Headphone / Line Out on stereo 3.5mm connector. Stereo Aux Line In, Audio Mono Out, Audio Speaker Out on GPIO Header. 2 x Knowles SMP0687LR5H-1 MEMS Microphones routed in low noise differential configuration. ESD protection on all audio inputs and outputs. Breadboard friendly, 70mm x 24mm. 11 x GPIO pins broken out to 2.54mm pitch header, with access to both ESP32 ADC channels, I2C and capacitive touch pins. USB 2.0 over USB Type C connector. 3.7/4.2v Lithium Polymer Rechargeable Battery or USB / 5V Powered, overvoltage protection Power consumption in normal usage (Wi-Fi off, running audio DSP code with mics active) = 100mA, with Audio Codec in standby mode = 52.4mA, low power usage (Audio Codec in standby mode and ESP32 in deep sleep mode) = 5.7mA. Battery voltage level detection. ESD protection on USB data bus. Note: The GPIOs are carefully selected based on experience and issues encountered with other ESP32 boards, I have attempted also to take into account things mentioned during the PAW workshop and conference, so for instance it is possible to use x4 ADC inputs and WiFi at the same time, USB is Type C connector, and most of the codec feature set is routed/broken out (Line Inputs, Aux Inputs, Mono Output, Speaker Output). A lot of the hardware design elements are finalised, but it is not too late to make some changes depending on what they are. I'll post the details in the Slack channel also. thanks, Andy -- Email: andywil...@tuta.io http://www.factmag.com/2017/07/29/pbmix-3-pocket-mixer-review/
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