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aprog_ideas_mini_projects.note (2339B)

      1                                  
      2                                  Mini Projects                                 
      3 ================================================================================
      4 
      5 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      6 |  1                         C(++) Speech Features                             |
      7 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      8 Make a lower level version of Python Speech Features that can perform the
      9 following:
     10 - FFT
     11 - Filtering (for filter bank aka MFSC)
     12 - DCP (for MFSC decorrelation)
     13 
     14 
     15 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     16 |  2                            Pitch detection                                |
     17 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     18 - Python Script / program that lets user whistle melodies and get a Csound / OSC 
     19   / MIDI melody out (with some adjusting)
     20 - First use simple autocorrelation. Maybe use some open source pitch detection
     21   later. 
     22 
     23 
     24 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     25 |  3                         (JACK) Looper program                             |
     26 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     27 - Triggered by a single button (/ USB foot pedal)
     28 - Window functionality for crossfade / smooth transitions
     29 
     30 
     31 +------------------------------------------------------------------------------+
     32 |  4                CLI sampler component: `detect_start()`                    |
     33 +------------------------------------------------------------------------------+
     34 - `detect_start()` helps finding where the actual audio starts in an audio file.
     35 - Just find the biggest leap in RMS (using a window) to approximate where the
     36   sound starts.
     37 - Arguments: `(double * sound, uint frame_size)`. That should be it...
     38 
     39 
     40 +------------------------------------------------------------------------------+
     41 |  V                           Far-future / Never                              |
     42 +------------------------------------------------------------------------------+
     43 - RaspPi can be used as sound module for MIDI keyboards / dig. piano w/ Csound.
     44 - Can make a complete workstation out of a keyboard connected to a RaspPi (or 
     45   a more powerful computer...) 
     46