diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
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+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
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+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+
+ Copyright (C)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see .
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ Copyright (C)
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+.
diff --git a/README.md b/README.md
new file mode 100644
--- /dev/null
+++ b/README.md
@@ -0,0 +1,116 @@
+# `jammittools`
+
+A command-line tool for exporting sheet music and audio from the Windows/Mac app [Jammit].
+It should go without saying, but please do not distribute content from songs you have purchased --
+it is for your use only!
+
+[Jammit]: https://www.jammit.com/
+
+## Requirements
+
+This is basically a fancy shell script but written in Haskell.
+[ImageMagick](http://www.imagemagick.org) and [Sox](http://sox.sourceforge.net/)
+are used to do the actual conversion work, so install those and put them in your path.
+If you're on Windows, ImageMagick `convert` infamously conflicts with a system tool of the same name,
+but `jammittools` tries looking in your Program Files so you shouldn't have to do anything.
+
+## Usage
+
+ jammittools -?
+ # Print usage info.
+
+ jammittools -d
+ # Displays the entire library.
+
+ jammittools -t "My Song" -r "Some Artist" -x dir
+ # Easiest export option: exports all sheet music and audio for a song.
+
+ jammittools -t "My Song" -r "Some Artist" -s file.pdf -y
+ # Exports a single sheet music file with a list of parts, interleaved.
+ # See below for the syntax of instrument parts.
+
+ jammittools -t "My Song" -r "Some Artist" -a file.wav -y
+ # Exports a single audio file with a list of parts, mixed together.
+ # See below for the syntax of instrument parts.
+
+ jammittools -t "My Song" -r "Some Artist" -c -y
+ # Do a "dry run" of audio extraction, which checks if the parts exist
+ # but does not do any conversion. Exits with a non-zero code if any
+ # part does not exist.
+
+Other lesser-used flags:
+
+ -j /path/to/jammit/lib
+ # On Windows and OS X, the official app's library location is used
+ # if you do not specify this flag.
+ # You can also specify the environment variable JAMMIT.
+
+ -T "My Song"
+ # Exact search on title, instead of -t which is case-insensitive substring.
+
+ -R "Some Artist"
+ # Exact search on artist, instead of -r which is case-insensitive substring.
+
+ -n
+ # Allows you to invert certain audio parts when exporting a WAV file.
+ # This can be used to access "hidden" parts that aren't a part of any
+ # transcribed instrument part, see below.
+
+ -l
+ # Select the number of sheet music systems per page.
+ # One system contains a line from each individual part.
+ # If this flag is not given, an appropriate number of systems will be chosen
+ # to get close to an 8.5" by 11" page ratio.
+
+Instrument parts are given by this somewhat terse syntax:
+
+ g - Guitar (1)
+ r - Guitar 2
+ b - Bass
+ d - Drums
+ k - Keyboard (1)
+ y - Keyboard 2
+ p - Piano
+ s - Synth
+ v - Vocals (Lead)
+ x - Vocals (Backing)
+ GRB - in sheet music, tab instead of notation
+ GBDKV - in audio, the backing track for an instrument
+
+So, for example, to make a backing track consisting of just drums and bass:
+
+ jammittools -a out.wav -y db
+
+To make a sheet music file with Guitar 1's notation and tab interleaved:
+
+ jammittools -s out.pdf -y gG
+
+## Accessing hidden parts
+
+Not all the audio in a song has been transcribed and sold by Jammit. Things such
+as sound-effects, other instruments like violin, and occasionally third guitar
+or keyboard parts are "hidden" inside the backing tracks for every instrument
+package that you can purchase. You can listen to these parts by performing
+audio subtraction, where you take two audio files, invert one of them, and then
+mix them together.
+
+Let's say you own all 5 instruments for a song. You can access the "hidden"
+track with the following command:
+
+ jammittools -a out.wav -y D -n grbkyvx
+
+This uses the `-n` flag to mix many audio files in after inverting them.
+The `D` part is the backing track for the drums package. What this does is
+subtract the non-drums instrument parts from this backing track, leaving you
+with just the portion of the song that isn't present in any of the transcribed
+parts. If you use the `-x` option to export all parts of a song, this process
+will be done for you and placed in a file called `backing.wav`.
+
+The resulting file has a thin layer of noise, because all the audio used in
+Jammit is lossily encoded, which means the backing tracks are not quite perfect
+mixes of their constituent parts. But the results are generally pretty good,
+and you can easily use something like [Audacity]'s noise filter to clean it up
+further. Using the drums backing track as a base is preferred, because drums
+leaves the most audible noise when you remove it from a different backing track.
+
+[Audacity]: http://audacity.sourceforge.net/
diff --git a/Setup.lhs b/Setup.lhs
new file mode 100644
--- /dev/null
+++ b/Setup.lhs
@@ -0,0 +1,4 @@
+#! /usr/bin/env runhaskell
+
+> import Distribution.Simple
+> main = defaultMain
diff --git a/cbits/aifc2wav-5.1.c b/cbits/aifc2wav-5.1.c
new file mode 100644
--- /dev/null
+++ b/cbits/aifc2wav-5.1.c
@@ -0,0 +1,785 @@
+/* public domain
+ * ima4, sowt and sdx2 handled
+ * sdx2 not hardly tested, may fail, contact me if problems
+ * endian-independant code
+ * sed@free.fr for comments/suggestions/anything
+ * http://sed.free.fr/aifc2wav.html
+ * Wed, 22 Jan 2003
+ * Last update: Fri, 30 Mar 2007
+ *
+ * algo, tables ripped from http://www.pcisys.net/~melanson/codecs/adpcm.txt
+ * the above link looks dead (2007-03-30), try the following link
+ * http://wiki.multimedia.cx/index.php?title=Category:ADPCM_Audio_Codecs
+ *
+ * file format in : ftp://ftp.sgi.com/sgi/aiff-c.9.26.91.ps.Z
+ *
+ * http://www.mactech.com/articles/mactech/Vol.06/06.01/SANENormalized/
+ * helped for handling extended numbers
+ *
+ * http://ewhac.best.vwh.net/3DO-old/music/
+ * for sdx2 code (see aif2raw.c there)
+ */
+
+/* handled chunks types */
+#define FORM 1
+#define COMM 2
+#define FVER 3
+#define SSND 4
+
+#include
+#include
+#include
+
+static int index_table[16] = {
+ -1, -1, -1, -1, 2, 4, 6, 8,
+ -1, -1, -1, -1, 2, 4, 6, 8,
+};
+
+static int step_table[89] = {
+ 7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
+ 19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
+ 50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
+ 130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
+ 337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
+ 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
+ 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
+ 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
+ 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
+};
+
+/* parse a chunk - waits a 34 bytes buffer, returns a little endian buffer */
+void decode_chunk(unsigned char *input, unsigned char *output, short *static_predictor)
+{
+ char d;
+ int i;
+ short predictor;
+ short step_index;
+ int hnb, lnb;
+ int diff;
+ int sign, delta;
+ short step;
+
+ d = *input++;
+ predictor=d << 8;
+ d = *input++;
+ step_index = d & 127;
+ predictor |= d&128;
+
+ // onyxite: use this channel's last packet's last sample as predictor
+ predictor = *static_predictor;
+
+ /* is this necessary ? */
+ if (step_index < 0) step_index = 0;
+ if (step_index > 88) step_index = 88;
+
+ step = step_table[step_index];
+
+ for (i=0; i<32; i++, input++) {
+ d = *input;
+ hnb = (d>>4) & 15;
+ lnb = d & 15;
+
+ /* decode lnb */
+ step_index += index_table[lnb];
+ /* necessary ? */
+ if (step_index<0) step_index = 0;
+ if (step_index>88) step_index = 88;
+
+ sign = lnb & 8;
+ delta = lnb & 7;
+ diff = step >> 3;
+ if (delta & 4) diff += step;
+ if (delta & 2) diff += step >> 1;
+ if (delta & 1) diff += step >> 2;
+ /* take care of clamping (Adam Sampson ) */
+ if (sign) {
+ int p = ((int) predictor) - diff;
+ if (p < -32768)
+ predictor = -32768;
+ else
+ predictor = p;
+ } else {
+ int p = ((int) predictor) + diff;
+ if (p > 32767)
+ predictor = 32767;
+ else
+ predictor = p;
+ }
+
+ *output = predictor&255;
+ output++;
+ *output = (predictor>>8)&255;
+ output++;
+
+ step = step_table[step_index];
+
+ /* decode hnb */
+ step_index += index_table[hnb];
+ if (step_index<0) step_index = 0;
+ if (step_index>88) step_index = 88;
+
+ sign = hnb & 8;
+ delta = hnb & 7;
+ diff = step >> 3;
+ if (delta & 4) diff += step;
+ if (delta & 2) diff += step >> 1;
+ if (delta & 1) diff += step >> 2;
+ /* take care of clamping (Adam Sampson ) */
+ if (sign) {
+ int p = ((int) predictor) - diff;
+ if (p < -32768)
+ predictor = -32768;
+ else
+ predictor = p;
+ } else {
+ int p = ((int) predictor) + diff;
+ if (p > 32767)
+ predictor = 32767;
+ else
+ predictor = p;
+ }
+
+ *output = predictor&255;
+ output++;
+ *output = (predictor>>8)&255;
+ output++;
+
+ // onyxite: save this sample so (if it's the last sample in this packet)
+ // it becomes the predictor for the next packet in this channel
+ *static_predictor = predictor;
+
+ step = step_table[step_index];
+ }
+}
+
+/* reads the FILE, return the type of the chunk, size too */
+/* return -1 on error, -2 if unhandled chunk, -3 if EOF */
+int get_type(FILE *f, long *size)
+{
+ int ret;
+
+ unsigned char buf[8];
+
+ ret=fread(buf, 1, 8, f);
+
+ if (ret == 0 && feof(f))
+ return -3;
+
+ if (ferror(f) || ret != 8)
+ return -1;
+
+ *size = (unsigned)(buf[4]<<24) + (buf[5]<<16) + (buf[6]<<8) + buf[7];
+
+ if (!strncmp((char*)buf, "FORM", 4)) {
+ /* let's check if it's AIFC or not */
+ if (fread(buf, 1, 4, f) != 4)
+ return -1;
+
+ if (strncmp((char*)buf, "AIFC", 4)) {
+ buf[4] = 0;
+ fprintf(stderr, "unsupported type %s\nonly AIFC handled\n", buf);
+ return -1;
+ }
+
+ *size -= 4;
+ return FORM;
+ }
+
+ if (!strncmp((char*)buf, "COMM", 4))
+ return COMM;
+
+ if (!strncmp((char*)buf, "FVER", 4))
+ return FVER;
+
+ if (!strncmp((char*)buf, "SSND", 4))
+ return SSND;
+
+ if (!strncmp((char*)buf, "FLLR", 4))
+ return -2;
+
+ buf[4] = 0;
+ fprintf(stderr, "warning: unhandled chunk %s (size=%ld)\n", buf, *size);
+
+ return -2;
+}
+
+/* transform an int into a little endian buffer */
+unsigned char *itole(unsigned long l, unsigned char *t)
+{
+ *t = l & 255;
+ *(t+1) = (l >> 8) & 255;
+ *(t+2) = (l >> 16) & 255;
+ *(t+3) = (l >> 24) & 255;
+ return t;
+}
+
+/* transform a short into a little endian buffer */
+unsigned char *stole(unsigned short l, unsigned char *t)
+{
+ *t = l & 255;
+ *(t+1) = (l >> 8) & 255;
+ return t;
+}
+
+/* different flags to know what chunk here, what chunk has been proceeded */
+#define FORM_DONE 1
+#define COMM_DONE 2
+#define FVER_DONE 4
+#define SSND_DONE 8
+
+/* we don't want stack space for those */
+static unsigned char buf[24];
+static unsigned char in[34];
+static unsigned char out[256]; /* only 128 if mono, 256 if stereo */
+static unsigned char out2[128]; /* for stereo, another buffer (we must
+ * interleave the two buffers in the WAV file)
+ */
+
+/* != file types supported */
+#define IMA4 1
+#define SOWT 2
+#define SDX2 3
+
+int aifc2wav_main(int n, char **v)
+{
+ long size;
+ int flags = 0;
+ char *input_file;
+ char *output_file;
+ FILE *fin, *fout;
+ int nb_chans; /* number of channels, must be 1 or 2 */
+ int nb_frames; /* number of sound chunks */
+ int nb_bits; /* nb bits / sample, must be 16 */
+ long double freq; /* sample rate */
+ long ssnd_pos; /* pos of beginning of the stream in the input file */
+ long total_size=1; /* some files are bigger than what says FORM size
+ * so we must only parse the nb of bytes given by
+ * FORM size (init to 1 for the while to run)
+ */
+ int sound_type=0; /* the type of the data in the sound file */
+ long riff_size; /* the riff size - depends of the type of data sound */
+ short *last; /* for SDX2 files */
+
+ short predictor_left = 0;
+ short predictor_right = 0;
+
+ if (n != 3) {
+ fprintf(stderr, "usage: %s