Hark Visualizer
A web app written with the Tornado framework for visualizing audio. The web app only processes 8-channel flac and wav files (for the time being) to detect direction of sound, duration of sounds, and a transcription using speech recognition. Try it out using the test.wav file. It only supports Japanese at the moment.
Thirdy-Party Services
Amazon AWS
Used for hosting the web server in Japan.
Tornado
Used as the web server for serving the webapp and delivering data to the browser via websockets.
Microsoft Cognitive Services/Azure
Used for hosting the Bing Speech API server instance.
Hark SaaS
Used for analyzing the audio files.
Speech Recognition
Used for transcribing the audio file via a wrapper around the Bing Speech API, as Google Speech API is not available anymore.
d3.js
Used for creating real-time data visualizations in the browser.
crossfilter.js
Used for n-dimensional filtering of multivariate datasets across D3 charts.
c3.js
A wrapper around D3.js for building charts quickly.