https://www.alexanderjunge.net/categories/raspberry-pi/ Recent content in Raspberry Pi on Alexander Junge's website Hugo -- gohugo.io en-US Sat, 13 Jun 2020 00:00:00 +0000 https://www.alexanderjunge.net/blog/rbpi-sound-detector-poc/ Sat, 13 Jun 2020 00:00:00 +0000 https://www.alexanderjunge.net/blog/rbpi-sound-detector-poc/ Using a Raspberry Pi 4 Model B and a Seeed ReSpeaker Mic Array v2.0 connected via USB, I built a simple sound-activated recorder. The Raspberry Pi records one-minute sound snippets at a time and, using a very simple heuristic, detects sound in the snippet. Snippets where no sound was detected are deleted. Snippets where sound was detected are converted to MP3 by a scheduled job and kept. This was a fun PoC project that could be extended in many directions.