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-*- outline -*-
* Introduction
The C/XEN library `libsndins.so' provides the instrument FM-VIOLIN and
the reverberators JC-REVERB, NREV, and FREEVERB to use them in longer
notelists in Snd/Scheme, Snd/Ruby, or Snd/Forth. They are not so fast
as Lisp's FFI versions, at least not on my machine, but they run much
faster than the Scheme, Ruby, or Forth variants. In addition I have
added the FCOMB example from sndscm.html which is used in freeverb.
The library is based on Bill Schottstaedt's `xen' and `sndlib'
libraries and the Snd editor itself. Thank you for these great music
programs and libraries!
* XEN-Instruments
The following generator and instruments are accessible from Scheme,
Ruby and Forth.
** make-fcomb, fcomb?, and fcomb
These are the examples from sndscm.html.
*** (make-fcomb (:scaler 1.0) (:size 1) (:a0 0.0) (:a1 0.0))
*** make_fcomb(:scaler, 1.0, :size, 1, :a0, 0.0, :a1, 0.0)
*** make-fcomb ( :scaler 1.0 :size 1 :a0 0.0 :a1 0.0 -- gen )
Return a new fcomb generator.
*** (fcomb? gen)
*** fcomb?(gen)
*** fcomb? ( gen -- f )
Test if GEN is an fcomb generator.
*** (fcomb gen (input 0.0))
*** fcomb(gen[, input=0.0])
*** fcomb ( gen input=0.0 -- result )
Return the next value of the fcomb generator GEN.
*** (mus-describe gen)
*** gen.to_s
*** object->string ( gen -- str )
Show the inspect string of the fcomb GEN.
*** (mus-length gen)
*** gen.length
*** mus-length ( gen -- len )
Show length of delay line.
*** (mus-scaler gen) (set! (mus-scaler gen) scl)
*** gen.scaler gen.scaler = scl
*** mus-scaler ( gen -- scl ) set-mus-scaler ( gen scl -- scl )
Show the scaler value, settable.
*** (mus-xcoeff gen index) (set! (mus-xcoeff gen index) val)
*** gen.xcoeff(index) gen.xcoeff = [index, val]
*** mus-xcoeff ( gen index -- val ) set-mus-xcoeff ( gen index val -- val )
Show the a0/a1 values, settable (index == 0: a0, index == 1: a1)
** fm-violin
Keyword options for fm-violin (v.ins, v.scm, examp.rb, clm-ins.fs).
*** :startime 0.0
*** :duration 1.0
*** :frequency 440.0
*** :amplitude 0.5
*** :fm-index 1.0
*** :amp-env '( 0 0 25 1 75 1 100 0 )
*** :periodic-vibrato-rate 5.0
*** :periodic-vibrato-amplitude 0.0025
*** :random-vibrato-rate 16.0
*** :random-vibrato-amplitude 0.005
*** :noise-freq 1000.0
*** :noise-amount 0.0
*** :ind-noise-freq 10.0
*** :ind-noise-amount 0.0
*** :amp-noise-freq 20.0
*** :amp-noise-amount 0.0
*** :gliss-env '( 0 0 100 0 )
*** :glissando-amount 0.0
*** :fm1-env '( 0 1 25 0.4 75 0.6 100 0 )
*** :fm2-env '( 0 1 25 0.4 75 0.6 100 0 )
*** :fm3-env '( 0 1 25 0.4 75 0.6 100 0 )
*** :fm1-rat 1.0
*** :fm2-rat 3.0
*** :fm3-rat 4.0
*** :fm1-index #f
*** :fm2-index #f
*** :fm3-index #f
*** :base 1.0
*** :degree 0.0
*** :distance 1.0
*** :reverb-amount 0.01
*** :index-type 'violin ('cello or 'violin)
*** :no-waveshaping #f
** jc-reverb
Keyword options for jc-reverb (jcrev.ins, jcrev.scm, examp.rb,
clm-ins.fs).
*** :volume 1.0
*** :delay1 0.013
*** :delay2 0.011
*** :delay3 0.015
*** :delay4 0.017
*** :low-pass #f
*** :doubled #f
*** :amp-env #f
If more than one reverb channel exists, the values from them are
collected together before computing the result.
** nrev
Keyword options for nrev (nrev.ins, clm-ins.scm, clm-ins.rb).
*** :reverb-factor 1.09
*** :lp-coeff 0.7
*** :lp-out-coeff 0.85
*** :output-scale 1.0
*** :amp-env '( 0 1 1 1 )
*** :volume 1.0
If more than one reverb channel exists, the values from them are
collected together before computing the result.
** freeverb
Keyword options for freeverb (freeverb.ins, freeverb.scm, freeverb.rb).
*** :room-decay 0.5
*** :damping 0.5
*** :global 0.3
*** :predelay 0.03
*** :output-gain 1.0
*** :output-mixer #f
*** :scale-room-decay 0.28
*** :offset-room-decay 0.7
*** :combtuning '( 1116 1188 1277 1356 1422 1491 1557 1617 )
*** :allpasstuning '( 556 441 341 225 )
*** :scale-damping 0.4
*** :stereo-spread 23.0
Works with one reverb channel or the same number of reverb channels
like output channels.
* C-Instruments
The following functions are accessible from C.
** mus_any *mus_make_fcomb(Float scaler, int size, Float a0, Float a1);
** int mus_fcomb_p(mus_any *ptr);
** Float mus_fcomb(mus_any *ptr, Float input, Float ignored);
** off_t ins_fm_violin(Float start,
Float dur,
Float freq,
Float amp,
Float fm_index,
Float *amp_env,
int amp_len,
Float periodic_vibrato_rate,
Float periodic_vibrato_amp,
Float random_vibrato_rate,
Float random_vibrato_amp,
Float noise_freq,
Float noise_amount,
Float ind_noise_freq,
Float ind_noise_amount,
Float amp_noise_freq,
Float amp_noise_amount,
Float *gliss_env,
int gliss_len,
Float gliss_amount,
Float *fm1_env,
int fm1_len,
Float *fm2_env,
int fm2_len,
Float *fm3_env,
int fm3_len,
Float fm1_rat,
Float fm2_rat,
Float fm3_rat,
Float fm1_index,
Float fm2_index,
Float fm3_index,
Float base,
Float degree,
Float distance,
Float reverb_amount,
bool index_type,
bool no_waveshaping,
mus_any *out,
mus_any *rev,
mus_interp_t mode);
** off_t ins_jc_reverb(Float start,
Float dur,
Float volume,
bool low_pass,
bool doubled,
Float delay1,
Float delay2,
Float delay3,
Float delay4,
Float *amp_env,
int amp_len,
mus_any *out,
mus_any *rev);
** off_t ins_nrev(Float start,
Float dur,
Float reverb_factor,
Float lp_coeff,
Float lp_out_coeff,
Float output_scale,
Float volume,
Float *amp_env,
int amp_len,
mus_any *out,
mus_any *rev);
** off_t ins_freeverb(Float start,
Float dur,
Float room_decay,
Float damping,
Float global,
Float predelay,
Float output_gain,
Float scale_room_decay,
Float offset_room_decay,
Float scale_damping,
Float stereo_spread,
int *combtuning,
int comb_len,
int *allpasstuning,
int all_len,
mus_any *output_mixer,
mus_any *out,
mus_any *rev);
* Prerequisite
Sndins depends on a configured and compiled, but not necessary
installed, libsndlib.a one directory in the hierarchy above sndins.
Configuring sndlib from sndlib.tar.gz creates a Makefile in
sndlib/sndins, sndlib's mus-config.h is needed as well and the
compiled sndlib/libsndlib.a will be linked in
sndlib/sndins/libsndins.*
* Compilation
Running Sndlib's configure script in sndlib path creates
sndins/Makefile from sndins/Makefile.in so we can use the configured
variables from Sndlib. Then one can cd to sndins and run make.
Again: Sndlib must be configured before!
cd sndins
make
* Installation
** Scheme
You can install libsndlib.so and libsndins.so to ${prefix}/lib with
the usual `make install' command. Again: Sndlib must be configured
before!
cd ${compile_sndlib_dir}
make
make install
cd sndins
make
make install
The library path should be in your LD_LIBRARY_PATH, e.g. if you have
installed the library in the unusual path /usr/gnu/lib., you can add
it by:
(csh) setenv LD_LIBRARY_PATH /usr/gnu/lib:${LD_LIBRARY_PATH}
(sh) LD_LIBRARY_PATH=/usr/gnu/lib:${LD_LIBRARY_PATH}; export LD_LIBRARY_PATH
In Snd/Scheme one can add to the ~/.snd init file:
(if (provided? 'snd)
(begin
(if (not (provided? 'sndlib))
(let ((hsndlib (dlopen "sndlib.so")))
(if (string? hsndlib)
(snd-error (format #f "script needs the sndlib module: ~A" hsndlib))
(dlinit hsndlib "Init_sndlib"))))
(if (not (provided? 'sndins))
(let ((hsndins (dlopen "sndins.so")))
(if (string? hsndins)
(snd-error (format #f "script needs the sndins module: ~A" hsndins))
(dlinit hsndins "Init_sndins")))))
(begin
(if (not (provided? 'sndlib)) (load-extension "libsndlib" "Init_sndlib"))
(if (not (provided? 'sndins)) (load-extension "libsndins" "Init_sndins"))))
** Ruby
You can install sndlib.so and sndins.so in the ruby library path, e.g.
(csh) setenv RUBYLIB ${HOME}/share/ruby/site-ruby:${HOME}/share/snd:${HOME}/lib/ruby/site-ruby
(sh) RUBYLIB=${HOME}/share/ruby/site-ruby:${HOME}/share/snd:${HOME}/lib/ruby/site-ruby
(sh) export RUBYLIB
cd ${compile_sndlib_dir}
make
install -c sndlib.so ~/lib/ruby/site-ruby/
cd sndins
make
install -c sndins.so ~/lib/ruby/site-ruby/
So in Snd/Ruby one can add to the ~/.snd(_ruby) init file:
require "sndlib"
require "sndins"
** Forth
Installing so-libs in Forth is possible with these command lines:
(csh) setenv FTH_FTHPATH ${HOME}/share/fth/site-fth
(csh) setenv FTH_LIBPATH ${HOME}/lib/fth
(sh) FTH_FTHPATH=${HOME}/share/fth/site-fth; export FTH_FTHPATH
(sh) FTH_LIBPATH=${HOME}/lib/fth; export FTH_LIBPATH
cd ${compile_sndlib_dir}
make
fth -Qve "install sndlib.so"
cd sndins
make
fth -Qve "install sndins.so"
These lines install the libraries in ~/lib/fth, the first user
writeable path.
Then in Snd/Forth one can add to the ~/.snd(_forth) init file:
dl-load sndlib Init_sndlib
dl-load sndins Init_sndins
* Samples
You can load the sample files into Snd, with Ruby and Forth you can
test them in a shell too. One may set with-sound variables in agn.*
and fmviolin.* files.
The agn.* files are translations of clm/clm-example.clm into Scheme,
Ruby, and Forth as a test case.
The fmviolin.* files are translations of clm/fmviolin.clm into Scheme,
Ruby, and Forth as a test case.
** Scheme
You can load the *.scm scripts into Snd. If you have compiled and
installed the Scheme sndlib and sndins libraries, you can type
(do-agn) ;; agn.scm
(short-example) ;; fmviolin.scm
(long-example) ;; fmviolin.scm
** Ruby
If you have compiled and installed the Ruby sndlib and sndins
libraries, you can type in a shell
./agn.rb [ outfile.rbm ]
./fmviolin.rb [ -s ]
The default outfile is agn.rbm. A different outfile name may end
in *.rbm. The option -s can be everything, its only meaning is to
choose the short_example, without an option long_example is chosen.
You can load these scripts into Snd too.
** Forth
If you have compiled and installed the Forth sndlib and sndins
libraries, you can type
./agn.fth [ outfile.fsm ]
./fmviolin.fth [ -s ]
The default outfile is agn.fsm. A different outfile name should end
in *.fsm. The option -s can be everything, its only meaning is to
choose the short-example, without an option long-example is chosen.
You can load these scripts into Snd too.
* README ends here