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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.
Some of the more popular tools for this include Sequitur and Phonetisaurus. It would also probably not be too hard to train something in PyTorch/Keras.
For one research project we used epitran: https://github.com/dmort27/epitran
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