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Versions of and change logs for the saugns program and SAU language. The history page has a more broad and big-picture description, which also goes back before the tagged versions from 2019 and later.
The CHANGELOG included with saugns covers all tagged versions. Below, links for tags and a log focused only on the SAU language can be found.
Per version, concise summaries of changes are written in plain
git tags from v0.3.3 and on. Viewing the difference between versions is easy to do using the git command-line tool; git diff old-version new-version shows the whole thing at once for any two versions, but the diff may be large.
Below is a shorter list of only changes that impact how scripts in the language are written – changes which often affect what's covered on this website. It may be updated ahead of new versions being tagged (see "stable branch" below). For fuller change notes for the saugns program, instead read its CHANGELOG.
This listing of changes is not completely exhaustive; some bugfixes, changes to undocumented behavior, and other small details affecting some possible scripts may go unlisted. The oldest tagged version v0.3.0 is compared to the historical (last 2012) sgensys-20120401.tgz version.
$ as leading character: $name=..., unlike object labels (which still use 'name ).'name , @name) and variables ($name) won't conflict if they have the same name any longer. Now they are separate rather than one dynamically typed variable.?= non-overriding numerical assignment; only takes effect for a variable that doesn't hold a number. Has no side effects when skipping evaluation of the expression.$?name construct warning when a numerical variable isn't already set to a number. Can be used by itself, or combined with assignment ($?name=...) to also do ?=. If used by itself, the script won't run on failed check.The new options for assigning numerical variables are meant to be used with a new variable=value command-line option, which allows passing values to scripts, optional or required, scripts possibly supplying fallback values.
Add backward-compatibility deprecated alias, 'name=.
Old scripts can be updated to use the newer assignment syntax,
without any manual adjustment, using regex search-and-replace:
perl -pi -e "s/'([A-Za-z0-9_]+\\s*)=/\\$\\1=/g;" paths...
seed(x) with $seed magic variable, which composes with the non-overriding assignment feature for simple cli setting and script handling of seed.Add backward-compatibility deprecated seed(x) function.
N (Noise generator), a plain noise generator without any frequency parameters. It has the underlying noise types of R, and red (re).=, allow whitespace after =, and not only before it. This behavior is less surprising.[] list unconnected to any parameter. Its objects are held unused. More language constructs are needed to use the free list, or its contents.S a.m script-wide gain mix control in outermost scope. Replaces the role of S a in disabling auto-downscaling by voices.Global amplitudes in unchanged scripts may sometimes be lowered by the S a changes. The old behavior corresponds to changing each S avalue to S avalue.m1.
The free [] list cannot yet be used for anything, thus remains an undocumented feature until more features for it are added.
[] list rather than in {}. They can be placed at the beginning of a list also used to assign modulators, for assigning both in one go.[] list to a parameter now appends the new list, instead of replacing any old items with it. To clear old items instead of appending to them, a dash can be added before the [, as in -[.c[] panning-AM modulators, in addition to value sweeps. Produces a stereo placement AM-like effect that disappears on mono downmix.Most older scripts did not remove modulators by setting new lists; those that do will require adjustment. Apart from that, a perl one-liner can be used to upgrade the sweep syntax in scripts. Deprecated support for the old sweep syntax is kept in the short term.
perl -pi -e 's/{/\[/g; s/}/\]/g; s/\]\[/ /g;' paths...
This means that pre-v0.4.2 script style can be updated turning {...}[...] into [...][...], if preferred.
b alias (f still supported).d and half-sharp z.v and sharp-and-a-half k.w and double-sharp x.S f.s tuning systems c (classic 5-limit JI) and p (Pythagorean 3-limit JI).c[] modulation and non-swept non-center values; e.g. cL[...] now is at left compared to cC[...], before it wasn't.This version fixes a few smaller default time bugs, and makes voices always number optimally low when counted (occasionally affecting default script amplitude) too.
R mode m flags h (half-shape waveform, for sawtooth-like waves) and z (zig-zag flip, adds jaggedness with randomness).sin, 3 × 3 complementary types, and 2 extras.par and mto – with saw, forms trio of wave types with all harmonics.ean, cat, and eto – forms trio of wave types with added even harmonics.ahs to spa (sine parabola), adjust phase offset to match other wave types.hrs to hsi (half-rectified sine), adjust phase offset to match other wave types.ssr, an extra all-harmonics wave type with little use.saw decreasing instead of increasing, to match other wave types; flip the amplitude or the frequency for the same result.sqe (square polynomial envelope), a softer alternative to xpe.cub (cubic polynomial segment), with steep ends and a flat middle.S f.s toggle with the previous justly intoned scale as the other option (j value).Cf4 as belonging to the octave above C4 (2011 behavior), instead change default octave for Cf to 5 when using key C.S f.k, for handling of default and relative octave numbers (and rotating the microtonal small letter scale).=, whitespace or a math symbol between it and math value/ID. Used to allow named constants for a paramater, for channel, frequency as note, or phase.<...>, useful for wrapping around use of S.Old scripts using Wssr will no longer work as expected; if that wave type is wanted, it could be re-added. Most other old scripts will produce equivalent results after adjusting saw uses, and adjusting phase p for and renaming the old hrs and ahs.
R (Random segments generator), an oscillator-like value noise generator.O to W (Wave oscillator). E.g. each Osin should change to Wsin.r before line shape (formerly "Ramp type") to l. E.g. an rexp becomes lexp.Backward-compatibility aliases have been added so scripts with type O, and (in the shorter term) sweep parameter r, still work with deprecation warnings.
R without line type (use default cos) and W without wave type (use default sin).R mode m flag v – for selecting from a set of violet noise functions instead of white noise functions. (Currently, violet versions of g and t are missing.)uwh (uniform white noise) – makes a sweep use uniform random numbers in the start–goal range, and R produce chunks of noise with a random amplitude and DC offset each (if using the default mode).uwh amplitude when used for sweep.nhl (noise hump line), a medium line-plus-noise type.ncl (noise camel line), a softer line-plus-noise type.This version fixes a bug affecting some builds of the program (x86-64 platform with clang compiler) – this fixes the mt and mvb modes for the R generator.
S options lexically scoped, restoring the values from outside a [] list when the list is exited.S a amplitude multiplier set inside a [] list to any modulators which follow at the same list level. Previously this value only applied to top-level carriers. Separate this particular setting at each list level, making the multipliers independent, except apply it to sublists of the new a[] variety.S option n to f.n.hold to sah (sample and hold).sin back to cos.'name=... variation of the syntax for variable assignment, for assigning a number. Variables are now dynamically typed. (The old and other value type is reference to object.)$name expression, for using a variable in a numerical expression.. is used, require digit(s) after. A lone trailing 0 can no longer be skipped but a lone leading 0 can still be skipped. (E.g. 0, 0.0, and .0 are all still fine for the number zero – but 0. no longer is.).-prefix instead of a ,-prefix. Furthermore, ,w was renamed to use the letter r. (This means .f instead of ,f and .r instead of ,w.)<...>.X,Y~[...] to Xw,Y[...].+ after p and place to set phase value.\number subshift to ;number gapshift, since the two ; compound step syntaxes go together.v for goal value to g.c before ramp name to r.cos to sin (and use more accurate polynomial).% remainder operation. Make ^ (to the power of) right-associative.cos(x), rand(), rint(x), seed(x), sin(x), time().mf, pi.Xw,Y[...] to X,wY[...]., just before f[...]. This is now the case for all such subparameters.*) for expressions like (X)Y too, not only X(Y).t parameter with literal d in place of the * feature v0.3.10 removed.{...}, and/or modulator list, in one go, where available. When written together they can only be written in that particular order.v (start value), as alias for the ordinary value before the {...}; allow use of one of them.{...}. Changing goal before old goal is reached now updates the start/ordinary value to the point reached on the prior trajectory. What remains of an unexpired time set for a ramp will now always be the default for its time until it runs out. And a ramp shape set is kept for any new updates for the parameter.;.)\ to /. Remove special value with literal t.s silent time padding parameter with new, more flexible \ subshift syntax.| reset, not add, delay to add for next step to prior duration.t parameter with literal *.G for golden angle.p+f[...] syntax, for frequency-linked PM.sha to ahs, szh to hrs, and ssr to srs.ssr.sqr, saw. Use new oscillator with DPW-ish aliasing reduction.saw increasing rather than decreasing.esd to xpe, and lsd to lge.cos.abs(x), exp(x), log(x), met(x), sqrt(x).[...] to <...>, still only for testing and further development.P keyword with channel mixing parameter c and S c default, with named constants C, L, R.[...] for testing and further development.shh. Use rounded corner shaped sqr, saw. Make saw decreasing, not increasing, by default.# with #!, remainder of file comment Q with #Q.fX f!Y[...] change to fX,Y~[...].<...>, change to inside [...].[...], change to inside {...}.p!, change to p+._.:name changed to @name.S a disables it.a (amplitude) parameter for AM and FM modulators too.r (relative frequency).exp to esd, and log to lsd.exp, log, and new hold.srs to ssr.sha, szh, shh./*...*/ and C++-style // comments.
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