SEGMOD (c) 2013-2020 by Luc Döbereiner and Martin Lorenz luc.doebereiner@gmail.com

TODO

• Fix: Make cli tool work again
• Add all options to web UI:
  • Bit rate change
  • Phase offset
  • Breakpoints per cycle
  • Download
  • Sample rates
• Fix: Oscilloscope working again
• Fix: Add more efficient wasm->js bridge so longer tables are possible
• Better defaults in web UI
• Make web UI pretty/usable
  • 100R Theme support
  • Share functionality
• Bonus: Add support for wave-dsl
  • Add wave-dsl as a submodule to git
• Bonus: looping
• Add some intro to the web UI
• Bonus: multitracking/multiple segmods running at the same time for layering

CLI

Usage: ./segmod2 [-s samplerate] [-w waveform file/static waveform] [-o output] [-p phase offset] [-b breakpoints per cycle (0 or 1)] [-f frequencies file] [-i index format input file]

  -sr 	: sample rate. The default is 44100
  -w 	: either a file name (see below) or a static waveform number. 0 (default) is sine, 1 is triangle, 2 is pulse, 3 is sawtooth, 4 is silence.
  -f	: a file containing a sequence of frequences (see below), can be used instead of "-i" option/format.
  -i	: an index file contating a frequency table and a sequence of indices (see below), can be used instead of the "-f" option/format. 
  -b 	: breakpoints per cycle. 0 (default) two breakpoints, 1 one breakpoint.
  -p 	: if set phase will be offset by pi avoiding discontiunities with sine waveform.
  -o 	: output filename. The default is "out.wav". Always a wav file.

The -f and the -i options cannot be used together.

EXAMPLES:

$ ./segmod -i freqseq.txt -o seq.wav

$ ./segmod -f myfrequencies.txt -o output.wav -p -w 1 -sr 48000

$ ./segmod -f myfrequencies.txt -w waveformseq.txt -o output2.wav -b 1

INPUT FILE FORMATS

Index file (same format as in segmod1)

The input files consists of one line of frequency values specifying the frequency table. The values are separated by one or more whitespace characters.

The rest of the file is a sequence of indices into the frequency table. Indexing starts with 1.

Lines starting with '#' are considered comments.

Frequencies file

Instead of using and index file (see above) the sequences can be specified directly using the "-f" option. The file has to contain a sequence of frequencies in Hz.

Lines starting with '#' are considered comments.

Waveform file

The waveform can be set to a static value or a sequence of waveforms can be specified using the "-w" option. The text file has to contain a series of integers (range 0 to 4), see "usage" for a description of the available waveforms. The waveform may change whenver the frequency changes, i.e. each cycle/half cycle (depending on the "-b" option").

Lines starting with '#' are considered comments.

Web