Audio analysis and processing - Project 1

C# / NAudio / WinForms

Features

• *.wav files support
• Displaying waveform in time
• Calculating and displaying parameters
  • Values:
    • VSTD (volume standard deviation),
    • VDR (volume dynamic range),
    • LSTER (low short time energy ratio),
    • HZCRR (high zero crossing rate ratio),
    • ZSTD (ZCR standard deviation)
  • Charts:
    • volume,
    • STE (short time energy),
    • ZCR (zero crossing rate),
    • silence,
    • voiced / unvoiced speech
• Silence detection (quasi working)
• Detection of voiced / unvoiced speech fragments (using STE and ZCR)

Planned features

• Energy entropy chart
• Music / speech detection + chart
• Optional
  • *.mp3 files support
  • Waveform display: X/Y scaling, offsetting, displaying markers
  • Saving markers definining boundaries for calculated params (samples or time) to csv

Links

• Course site
• Separation of Voiced and Unvoiced using Zero crossing rate and Energy of the Speech Signal, Bachu R.G., Kopparthi S., Adapa B., Barkana B.D.
• Pitch Detection Methods, Politechnika Gdańska