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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
When I run it through a 3rd party FFT routine (https://github.com/kosme/arduinoFFT), and then generate a test tone on my mobile, it works for frequencies between about 200Hz and 4000Hz.
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