[Question] I'm wanting to take an audio file and, using a potentiometer, scrub back and forth through that audio file and playing that in real time, as if I was scratching back and forth on a record or one of those audio card machines.

• JUCE

  105 6,073 9.5 C++

  JUCE is an open-source cross-platform C++ application framework for desktop and mobile applications, including VST, VST3, AU, AUv3, LV2 and AAX audio plug-ins.

  

You're looking for a variable-speed resampling algorithm for an audio file loaded in memory. Will be far easier on a Raspberry Pi. Use JUCE to write it, and control it using a rotary encoder. JUCE already includes a resampler, as well as audio file support, and audio device streaming, so you'd have all you need.

• InfluxDB

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  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.

  

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