Current tasks:

• Install script

  • setup virtualenv
  • Download sms-tools and add to python path

• STFT

  • Improve error
    • Different window type?
      • Hamming windows and related are POA at 50%
    • No windowing?
    • Need to add another frame
  • More Tests?
    • Peak consistency
    • Add new parameters
  • Infer length of synthesized sound from spectrum

• Harmonic Analysis

  • Need to normalize stft output before transformations
    • Normalized by DFT length, then to decibals
  • Peak Detection
    • Maximum number of peaks??
  • Parabolic Interpolation
  • Variables
    • Minimum amplitude threshold (based on sidelobe level, paramterized for now)
      • -40dB looks alright for Hamming
      • -30dB for Hann?
      • Need a way to validate that we're eliminating the sidelobes, probably a test on a single waveform, ensuring that i get one(two) values out of this step
    • Minimum duration threshold
    • Maximum number of tracks?
  • Tests
    • Parabolic Interpolation
    • Shape
    • Accuracy (number of tracks??)
    • Fundamental??

• Stochastic Analysis

• Pitch shift

  • Read wav file
  • Perform stft
  • Identify Peaks
    • Window size (might be depentdent on fundamental frequency detection)
    • Frequency variability
    • Duration threshold
    • Min amplitude
    • Parabolic interpolation
  • Identify fundamental fq
  • Stochastic analysis
  • Adjust harmonics to new fundamental
  • Synthesize
  • write wav

• Variables

  • DFT size (parameterized for now, but should be inferred from fundamental)
  • Window type (Hanning)
  • Frequency delta threshold
  • Minimum amplitude threshold
  • Minimum duration threshold
  • Window size (same as DFT size duh)