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siggen - a package of waveform generation programs for linux
------------------------------------------------------------
Version 2.3.+
siggen
Tried adding loadable waveforms - came to an impasse. I will revisit
this.
Added a "tracking" feature suggested by Gart Reese. 't' or 'T'
while in the waveform, frequency or gain fields will cause both
similar fields of each channel to track, i.e. have the same value.
A "tracking" message shows which fields are currently tracking.
Repeating 't' or 'T' cancels the tracking of the fields.
fsynth
A curses based "fourier" synthesis program. Allows a mixture of
a fundamental sine wave and varying proportions of it's harmonics
to be mixed to create complex waveforms.
tones
Added loadable waveforms. Tones can load a waveform from a WAV file
that contains exactly one seconds worth of samples, at the same samplerate
as tones is using and same format etc, and it will "play" from the these
samples. The waveform name is the basename of the wav file with directory
and any suffix removed. To work correctly the samples should be for a 1Hz
wave. If its for say a 2Hz wave then the frequencies generated will all
be double for that waveform.
Added recursive command file reading.
Attenuation/gain levels added, thanks to "Mark E. Shoulson"
<[email protected]> for a patch, feedback and comments. Fixed faulty mixing
code for more than 2 channels.
All curses progs
The ability to "Lock" input field to freeze values. Locked fields
are skipped while moving around the screen. All locked fields can
be unlocked in one go to reset. '!' or 'L' locks the current field,
'U' unlocks all locked fields. This was the result of misunderstanding
an idea from Garst!
Also added ability to redraw screen by pressing Ctrl-L (^L), useful
if screen gets garbled.
Bug fix in scfio.c, thanks to "Garst R. Reese" <[email protected]>
for use egcs and finding the bug - I think gcc was too forgiving.
All progs
Added configuration file(s) support.
Version 2.2
tones, sgen, swgen
Added ability to compile on machines without sound support,
so that WAV and raw data files can be created.
Fixed so can be compiled under SUNOS on sparc machines. This meant
fixing the implicit little endian nature of the raw and wav file writing
code.
New config.h file added with user configurable options gathered together
in one place, for global options.
tones, sgen, swgen
Added the -x10 and -x100 options, which when in use allow the
generation of freq. to the nearest 0.1Hz or 0.01Hz by forcing
the specification of all frequencies to be 10 or 100 times
too big.
e.g. swgen -x10 -2 -v 2 2000 20000
causes stereo samples for a 0.2Hz sawtooth ramp sweeping
a sin wave from 200Hz to 2000Hz.
Version 2.1
Fixed compilation problem of incompatible extern declaration
of sys_errlist . extern wasn't necessary so deleted it.
Version 2
Added swgen - a swept frequency generator.
Added sweepgen - a curses based swept freq. generator
Changed siggen to play continuously - changes to waveform, freq,
gain etc take effect (almost) immediately. Downside is that
this is a lot more processor intensive. Fine, just, on my 486DX2/66.
Extended the tones program, extensively.
Added dtmf program which can be used as tone phone dialer.
Fixed mixed up description of sawtooth/triangle waves in sgen manual.
Version 1.1 released xx March 1997
Fixed a small initialise bug in sgen - reported by
Michael Meifert <[email protected]>
(Michael this email address doesn't work)
Fixed a bug in siggen that prevented PULSE waveforms being generated
Added the tones program following a suggestion by Michael who
wanted a program to generate tones to control a radio repeater (I think).
Version 1 released 6 March 1997
contained programs sgen, siggen, smix, soundinfo