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Cbox is now a system-wide library and the python module is integrated locally into the template without python sys searchpath injections

Nils 2 years ago
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@module >> @chorus, @phaser, ...
@moduleslot/status() ->
/insert_engine(string engine),
/insert_preset(string preset),
/bypass(int bypassed)
@moduleslot/insert_engine(string engine)
@moduleslot/insert_preset(string engine)
@moduleslot/engine/{add: @module}
@moduleslot/set_bypass(int bypassed)
@track/add_clip(int pos, int offset, int length, string pattern)
/master/status() -> /sample_rate, /tempo, /timesig, /playing, /pos, /pos_ppqn
/master/tell() -> /playing, /pos, /pos_ppqn
/master/set_tempo(float tempo)
/master/set_timesig(int num, int denom)
/master/seek_samples(int samples)
/master/seek_ppqn(int ppqn)
/meter/get_peak() -> /peak(float left, float right)
/meter/get_rms() -> /rms(float left, float right)
/config/sections([string prefix]) -> [/section(string name)]
/config/keys(string section, string ?prefix) -> [/section(string name)]
/config/get(string section, string key) -> /value(string value)
/config/set(string section, string key, string value)
/config/delete(string section, string key)
/config/delete_section(string section)
/config/save(string ?filename)
/engine/status() -> /scene(object scene)
/engine/render_stereo(int nframes)
/engine/master_effect/{add: @moduleslot}
/engine/new_scene() -> uuid
/engine/new_recorder() -> uuid
/scene/transpose(int semitones)
/scene/load(string scene_name)
/scene/add_layer(int layer_pos, string layer_name)
/scene/add_instrument_layer(int layer_pos, string instrument_name)
/scene/delete_layer(int pos)
/scene/move_layer(int oldpos, int newpos)
/scene/instr/<name>/status() ->
/engine(string name),
/aux_offset(int first_aux_output_no),
/outputs(int stereo_output_count)
/scene/instr/<name>/output/<index>/status() ->
/gain_linear(float gain),
/gain(float gain_dB),
/output(int output_bus),
{add: @moduleslot/status()}
/scene/instr/<name>/output/<index>/gain(float gain_dB),
/scene/instr/<name>/output/<index>/output(int output_bus)
/scene/instr/<name>/output/<index>/{add: @moduleslot}
/scene/instr/<name>/aux/<index>/status() ->
/gain_linear(float gain),
/gain(float gain_dB),
/bus(string output_bus),
{add: @moduleslot/status()} XXXKF ????
/scene/instr/<name>/aux/<index>/gain(float gain_dB)
/scene/instr/<name>/aux/<index>/bus(string bus)
/scene/instr/<name>/aux/<index>/{add: @moduleslot}
/scene/layer/<index>/status() ->
/instrument_name(string iname),
/instrument_uuid(string uuid),
/consume(int consume),
/ignore_scene_transpose(int ignore),
/disable_aftertouch(int disable),
/transpose(int semitones),
/fixed_note(int note),
/low_note(int note),
/high_note(int note),
/in_channel(int channel),
/out_channel(int channel)
/scene/layer/<index>/instrument_name(string iname)
/scene/layer/<index>/consume(int consume)
/scene/layer/<index>/ignore_scene_transpose(int ignore)
/scene/layer/<index>/disable_aftertouch(int disable)
/scene/layer/<index>/transpose(int semitones)
/scene/layer/<index>/fixed_note(int note)
/scene/layer/<index>/low_note(int note)
/scene/layer/<index>/high_note(int note)
/scene/layer/<index>/in_channel(int channel)
/scene/layer/<index>/out_channel(int channel)
/scene/aux/<name>/slot/{add: @module}
/scene/load_aux(string name)
/scene/delete_aux(string name)
/scene/status() ->
/transpose(int semitones),
[/layer(string uuid)],
[/instrument(string instance, string engine)],
[/aux(string name, string uuid)]
/rt/status() -> /audio_channels(int inputs, int outputs)
/song/status() -> [/track(int index, string name, int items)], [/pattern(int index, string name, int length)]
/waves/status() -> /bytes(int bytes), /max_bytes(int max_bytes), /count(int count)
/waves/list() -> [/waveform(int id)]
/waves/info(int id) -> /filename(string), /name(string), /bytes(int)
/on_idle() -> {any}
/send_event_to(string output, int)
/send_event_to(string output, int, int)
/send_event_to(string output, int, int, int)
/play_note(int ch, int note, int velocity) (plays a note with duration=1 on the next buffer)
/play_drum_pattern(string pattern)
/play_drum_track(string track)
/play_blob(blob serialized_pattern, int length_ticks)
/get_pattern() -> /pattern(blob serialized_pattern, int length_ticks)
/new_meter() -> /uuid
/new_recorder(string filename) -> /uuid


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Krzysztof Foltman <>


@ -1,674 +0,0 @@
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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



@ -1,365 +0,0 @@
Installation Instructions
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Unfortunately, this technique does not work for `CONFIG_SHELL' due to
an Autoconf bug. Until the bug is fixed you can use this workaround:
CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash
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suppress all normal output, redirect it to `/dev/null' (any error
messages will still be shown).
Look for the package's source code in directory DIR. Usually
`configure' can determine that directory automatically.
Use DIR as the installation prefix. *note Installation Names::
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`configure' also accepts some other, not widely useful, options. Run
`configure --help' for more details.


@ -1,152 +0,0 @@
AM_CPPFLAGS = -I$(srcdir) -Wall -Wsign-compare -D_GNU_SOURCE
bin_PROGRAMS = calfbox
noinst_PROGRAMS = calfbox_tests
calfbox_SOURCES = \
appmenu.c \
main.c \
menu.c \
menuitem.c \
calfbox_tests_SOURCES = \
calfbox_tests_LDADD = $(GLIB_DEPS_LIBS) -lpthread -lm -lrt
libcalfbox_la_SOURCES = \
app.c \
auxbus.c \
blob.c \
chorus.c \
cmd.c \
compressor.c \
config-api.c \
delay.c \
distortion.c \
dom.c \
engine.c \
eq.c \
errors.c \
fbr.c \
fifo.c \
fluid.c \
fuzz.c \
fxchain.c \
gate.c \
hwcfg.c \
instr.c \
io.c \
jackinput.c \
jackio.c \
layer.c \
limiter.c \
master.c \
meter.c \
midi.c \
mididest.c \
module.c \
pattern.c \
pattern-maker.c \
phaser.c \
prefetch_pipe.c \
recsrc.c \
reverb.c \
rt.c \
sampler.c \
sampler_channel.c \
sampler_gen.c \
sampler_layer.c \
sampler_nif.c \
sampler_prevoice.c \
sampler_prg.c \
sampler_rll.c \
sampler_voice.c \
scene.c \
scripting.c \
seq.c \
seq-adhoc.c \
sfzloader.c \
sfzparser.c \
song.c \
streamplay.c \
streamrec.c \
tarfile.c \
tonectl.c \
tonewheel.c \
track.c \
usbaudio.c \
usbio.c \
usbmidi.c \
usbprobe.c \
ARCH_OPT_CFLAGS=-msse -ffast-math
ARCH_OPT_CFLAGS=-mfloat-abi=hard -mfpu=neon -ffast-math
noinst_HEADERS = \
app.h \
auxbus.h \
biquad-float.h \
blob.h \
cmd.h \
config-api.h \
dom.h \
dspmath.h \
envelope.h \
engine.h \
eq.h \
errors.h \
fifo.h \
hwcfg.h \
instr.h \
io.h \
ioenv.h \
layer.h \
master.h \
menu.h \
menuitem.h \
meter.h \
midi.h \
mididest.h \
module.h \
onepole-int.h \
onepole-float.h \
pattern.h \
pattern-maker.h \
prefetch_pipe.h \
recsrc.h \
rt.h \
sampler.h \
sampler_impl.h \
sampler_layer.h \
sampler_prg.h \
scene.h \
scripting.h \
seq.h \
sfzloader.h \
sfzparser.h \
song.h \
stm.h \
tarfile.h \
tests.h \
track.h \
ui.h \
usbio_impl.h \
EXTRA_DIST = cboxrc-example



@ -1 +0,0 @@


@ -1,63 +0,0 @@
# Calfbox
Calfbox, the "open source musical instrument", offers assorted music-related code.
Originally intended as a standalone instrument for Linux and embedded devices (USB TV Sticks)
it can be used as Python module as well.
# Packaging
If you are a packager and want to create a binary package for your distribution please package only the python module.
The binary executable is not maintained and untested at the moment. It should not be used by anyone.
# Calfbox as Python Module
Calfbox can be used as a Python module that can be imported to create short scripts or
full fledged programs ( ).
Most notably it features a midi sequencer and an audio sampler (for sfz files and sf2 via fluidsynth).
## Building
A convenience script `` has been supplied to quickly build and install the cbox python module.
make clean
rm build -rf
python3 build
sudo python3 install
## How to write programs with cbox
You can find several `.py` files in the main directory, such as `` or
Also there is a directory `/experiments` which contains a small example framework.
# Using Calfbox as standalone instrument
Using Calfbox as standalone instrument requires a .cfg config file.
This part of the program is currently unmaintained and untested. Please do not use it.
# License
This code 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
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 <>.
For the full license see the file COPYING

template/calfbox/py/ → template/calfbox/

template/calfbox/py/ → template/calfbox/

@ -96,13 +96,23 @@ class PyCmdTarget(CmdTarget):
def find_calfbox():
if "CALFBOXLIBABSPATH" in os.environ:
assert os.path.exists(os.environ["CALFBOXLIBABSPATH"])"Searching for calfbox shared library with absolute path: %s", (os.environ["CALFBOXLIBABSPATH"]))
assert os.path.exists(os.environ["CALFBOXLIBABSPATH"]), os.environ["CALFBOXLIBABSPATH"]
cblib = os.environ["CALFBOXLIBABSPATH"]
elif "CALFBOXLIBFILENAME" in os.environ:
#This should be just name of the lib, not a filename and no "lib"-prefix. For example "calfbox" if the real name is"Searching for calfbox shared library with just the filename: %s", (os.environ["CALFBOXLIBFILENAME"]))
cblib = find_library(os.environ["CALFBOXLIBFILENAME"])
cblib = find_library('calfbox')"Loading calfbox shared library: %s" % (cblib))
cb = cdll.LoadLibrary(cblib)
return cb
if cblib:"Loading calfbox shared library: %s" % (cblib))
cb = cdll.LoadLibrary(cblib)
return cb
raise FileNotFoundError("Calfbox shared library not found: %s" % (cblib))
cb = find_calfbox()
cb.cbox_embed_get_cmd_root.restype = CmdTargetPtr
@ -120,7 +130,7 @@ class WrapCmdTarget(PyCmdTarget):
self.fb = fb
def process(self, cmd, args):
self.fb(cmd, None, args)
def init_engine(config=None):
gptr = GErrorPtr()
if not cb.cbox_embed_init_engine(config, byref(gptr)):
@ -182,6 +192,6 @@ def do_cmd_on(target, cmd, fb, args):
raise Exception(gptr.contents.message.decode())
raise Exception("Unknown error")
def do_cmd(cmd, fb, args):
do_cmd_on(cb.cbox_embed_get_cmd_root(), cmd, fb, args)


@ -1,47 +0,0 @@
import os
import sys
import struct
import time
import unittest
sys.path = ["./py"] + sys.path
import cbox
global Document
global Transport
Document = cbox.Document
Transport = cbox.Transport
song = Document.get_song()
# Delete all the tracks and patterns
# Create a binary blob that contains the MIDI events
pblob = bytes()
for noteindex in range(20):
# note on
pblob += cbox.Pattern.serialize_event(noteindex * 12, 0x90, 36+noteindex*3, 127)
# note off
pblob += cbox.Pattern.serialize_event(noteindex * 12 + 11, 0x90, 36+noteindex*3, 0)
# This will be the length of the pattern (in pulses). It should be large enough
# to fit all the events
pattern_len = 10 * 24 * 2
# Create a new pattern object using events from the blob
pattern = song.pattern_from_blob(pblob, pattern_len)
retrig = 10
i = 0
while i < 50:
i += 1
retrig -= 1
if retrig <= 0:
print ("Triggering adhoc pattern with ID 1")
Document.get_scene().play_pattern(pattern, 240, 0)
retrig = 5
# Query JACK ports, new USB devices etc.


@ -1,391 +0,0 @@
Calf Box, an open source musical instrument.
Copyright (C) 2010-2013 Krzysztof Foltman
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
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 <>.
#include "app.h"
#include "blob.h"
#include "config-api.h"
#include "engine.h"
#include "instr.h"
#include "io.h"
#include "layer.h"
#include "menu.h"
#include "menuitem.h"
#include "meter.h"
#include "midi.h"
#include "module.h"
#include "scene.h"
#include "seq.h"
#include "song.h"
#include "track.h"
#include "ui.h"
#include "wavebank.h"
#include <assert.h>
#include <glib.h>
#include <glob.h>
#include <getopt.h>
#include <math.h>
#include <ncurses.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
static gboolean lookup_midi_merger(const char *output, struct cbox_midi_merger **pmerger, GError **error)
if (*output)
struct cbox_uuid uuid;
if (!cbox_uuid_fromstring(&uuid, output, error))
return FALSE;
*pmerger = cbox_rt_get_midi_output(app.rt, &uuid);
if (!*pmerger)
g_set_error(error, CBOX_MODULE_ERROR, CBOX_MODULE_ERROR_FAILED, "Unknown MIDI output UUID: '%s'", output);
return FALSE;
if (!app.engine->scene_count)
g_set_error(error, CBOX_MODULE_ERROR, CBOX_MODULE_ERROR_FAILED, "Scene not set");
return FALSE;
*pmerger = &app.engine->scenes[0]->scene_input_merger;
return TRUE;
static gboolean app_process_cmd(struct cbox_command_target *ct, struct cbox_command_target *fb, struct cbox_osc_command *cmd, GError **error)
if (!cmd->command)
g_set_error(error, CBOX_MODULE_ERROR, CBOX_MODULE_ERROR_FAILED, "NULL command");
return FALSE;
if (cmd->command[0] != '/')
g_set_error(error, CBOX_MODULE_ERROR, CBOX_MODULE_ERROR_FAILED, "Invalid global command path '%s'", cmd->command);
return FALSE;
const char *obj = &cmd->command[1];
const char *pos = strchr(obj, '/');
if (pos)
if (!strncmp(obj, "master/", 7))
return cbox_execute_sub(&app.engine->master->cmd_target, fb, cmd, pos, error);
if (!strncmp(obj, "config/", 7))
return cbox_execute_sub(&app.config_cmd_target, fb, cmd, pos, error);
if (!strncmp(obj, "scene/", 6))
return cbox_execute_sub(&app.engine->scenes[0]->cmd_target, fb, cmd, pos, error);
if (!strncmp(obj, "engine/", 7))
return cbox_execute_sub(&app.engine->cmd_target, fb, cmd, pos, error);
if (!strncmp(obj, "rt/", 3))
return cbox_execute_sub(&app.rt->cmd_target, fb, cmd, pos, error);
if (!strncmp(obj, "io/", 3))
return cbox_execute_sub(&, fb, cmd, pos, error);
if (!strncmp(obj, "song/", 5) && app.engine->master->song)
return cbox_execute_sub(&app.engine->master->song->cmd_target, fb, cmd, pos, error);
if (!strncmp(obj, "waves/", 6))
return cbox_execute_sub(&cbox_waves_cmd_target, fb, cmd, pos, error);
if (!strncmp(obj, "doc/", 4))
return cbox_execute_sub(cbox_document_get_cmd_target(app.document), fb, cmd, pos, error);
g_set_error(error, CBOX_MODULE_ERROR, CBOX_MODULE_ERROR_FAILED, "Unknown combination of target path and argument: '%s', '%s'", cmd->command, cmd->arg_types);
return FALSE;
if (!strcmp(obj, "on_idle") && !strcmp(cmd->arg_types, ""))
return cbox_app_on_idle(fb, error);
if (!strcmp(obj, "send_event_to") && (!strcmp(cmd->arg_types, "siii") || !strcmp(cmd->arg_types, "sii") || !strcmp(cmd->arg_types, "si")))
const char *output = CBOX_ARG_S(cmd, 0);
struct cbox_midi_merger *merger = NULL;
if (!lookup_midi_merger(output, &merger, error))
return FALSE;
int mcmd = CBOX_ARG_I(cmd, 1);
int arg1 = 0, arg2 = 0;
if (cmd->arg_types[2] == 'i')
arg1 = CBOX_ARG_I(cmd, 2);
if (cmd->arg_types[3] == 'i')
arg2 = CBOX_ARG_I(cmd, 3);
struct cbox_midi_buffer buf;
cbox_midi_buffer_write_inline(&buf, 0, mcmd, arg1, arg2);
cbox_engine_send_events_to(app.engine, merger, &buf);
return TRUE;
if (!strcmp(obj, "send_sysex_to") && !strcmp(cmd->arg_types, "sb"))
const char *output = CBOX_ARG_S(cmd, 0);
struct cbox_midi_merger *merger = NULL;
if (!lookup_midi_merger(output, &merger, error))
return FALSE;
const struct cbox_blob *blob = CBOX_ARG_B(cmd, 1);
struct cbox_midi_buffer buf;
cbox_midi_buffer_write_event(&buf, 0, blob->data, blob->size);
cbox_engine_send_events_to(app.engine, merger, &buf);
return TRUE;
if (!strcmp(obj, "update_playback") && !strcmp(cmd->arg_types, ""))
return TRUE;
if (!strcmp(obj, "get_pattern") && !strcmp(cmd->arg_types, ""))
if (!cbox_check_fb_channel(fb, cmd->command, error))
return FALSE;