• because they are basic.
• because they encourage curiosity, freedom of learning and do-it-yourself research "hunch".
• because they can mitigate a learning curve.
• because these utilities hadn't been found elsewhere.
• because they are simple enough to write and require no professional programming skills in order to be written.
    Just a bit of plain C language, no streamlined shell-scripts, classes and wrappers.
• because the only audio-specific tools used, if any, are the most basic, lowest-level CoreAudio or RTaudio tools.
• because the documentation on how to write some of them is still surprisingly scarce.
• because they have proved useful so far.
• because even the most sophisticated algorithmic composition languages, such as
    RTcmix are command-line based.

• s2l converts SPEAR format to old-style LISP format.
  USAGE:
  s2l < infile > outfile
  
  If you don't redirect output to a outfile, it will print on the screen.
  
  
• l2s converts old-style LISP format to newer SPEAR format.
  USAGE:
  l2s < infile > outfile
  
  If you don't redirect output to a outfile, it will print on the screen.
  
  

• dur is the desired uniform interval duration between points.

The GUI version of this program can also save the values as CAF and AIF audio files.

TextFilePlayer is a version of the same program which can read one dimensional floating point data in text format and converts it to sound; it is available in source code.

USAGE:
tfp file

• algorithmic frequency series generator:
  
  • pri generates frequency series derived from prime numbers inside [n1 n2] interval mapped into twelve pitch classes, realized in rectus and inversus form.
    USAGE: com <n1> <n2>, n1 and n2 are positive integers.
    
    
  • com generates frequency series from binomial coefficients mapped into twelve pitch classes, realized in rectus and inversus form.
    USAGE: com <n>, n is a positive integer.
    
    
  • genetic generates series of n frequencies from genetic agorithm results, mapped into twelve pitch classes.
    USAGE: com <n>, n is a positive integer.
    
    
• sinewave synthesizer:
  
  • siner1 generates sinewave samples from frequency series, in text or binary format, for hard-coded sampling frequency (44100Hz) and adjustable segment duration.
    USAGE: siner1 [-bd duration], option b stands for binary output format, option d requires segment duration (in seconds).
    
    
• players:
  
  • tfp1 accepts text format data
  • fbp1 accepts binary format data
    
    
• connection examples:
  
  • pri 1 128 | siner1 | tfp1
    
  • com 6 | siner1 -bd 0.2 | fbp1
    
    

• rtsine plays a musical interval of two sinewaves in L and R channels.
  USAGE:
  rtsine
  
• rtswg is the C++ source code for the additive SineWaveGenerator
  USAGE:
  rtswg freq1 freq2 ... ...freqn -[q|e|b]
  usage and options are the same as for swg (SineWaveGenerator).
  
• rtfbp is the C++ source code for FloatBufferPlayer using RtAudio:
  USAGE:
  rtfbp sample_rate file_name <device_number> <channel_offset>
  device_number and channel_offset values are optional.
  
• rttfp is the C++ source code for TextFilePlayer using RtAudio:
  USAGE:
  rttfp sample_rate file_name <device_number> <channel_offset>
  device_number and channel_offset values are optional.
  
• rtpt is a slightly more complex demo program based on combining concepts of rtswg and Thread Demo with source code adapted for synthesizing a large number of partials, using a faster wavetable algoritm, parallel multi-processing, TPCircularBuffer and RtAudio:
  USAGE:
  rtpt num_partials fundamental_freq -[q|e|b]
  options are the same as for rtswg (SineWaveGenerator).
  
• rtpm is the summarizing demo program combinging the technologies of wavetable algoritm oscillator bank synthesis, parallel multi-processing, POSIX threads, circular buffering, RtAudio and RtMidi in the form of a no GUI monophonic synthesizer.
  USAGE:
  rtpm num_partials -[q|e|b]
  options are the same as for rtswg (SineWaveGenerator).
  
• rtfbp1 is a version of rtfbp written for connecting with Slightly more elaborate examles above:
  USAGE:
  rtfbp1 sample_rate file_name <device_number> <channel_offset>
  device_number and channel_offset values are optional.
  0 file_name tells program to pipe input data from another program:
  EXAMPLE: com 6 | siner1 -db 0.2 | rtfbp1 44100 0
  
• rttfp1 is a version of rttfp written for connecting with Slightly more elaborate examles above:
  USAGE:
  rttfp1 sample_rate file_name <device_number> <channel_offset>
  device_number and channel_offset values are optional.
  0 file_name tells program to pipe input data from another program:
  EXAMPLE: com 6 | siner1 -d 0.2 | rttfp1 44100 0
  

Utilities work with MacOS X 10.6 and 10.7, 10.8 and 10.10 but: