#N canvas 736 167 442 1518 10; #X text 32 20 Using Puredata (libpd) on Bela; #X text 32 30 ==============================; #X obj 100 598 osc~ 440; #X obj 100 620 *~ 0.1; #X obj 100 642 dac~; #X text 33 561 Here's how you produce a sine wave out of Bela's stereo output:; #X text 33 671 Similarly \, Bela's stereo input can be addressed as follows:; #X obj 100 702 adc~; #X obj 100 724 dac~; #X text 177 713 Audio pass-through; #X text 33 1791 Supported objects; #X text 33 1801 -----------------; #X text 33 1835 All native pd (vanilla) objects can be used.; #X text 33 1821 By default Bela uses libpd to run puredata patches. ; #X text 33 1855 It is also possible to compile pd objects to optimised ; #X text 33 1868 C code using the Heavy Cloud Compiler \, in which case ; #X text 33 1881 a different set of objects is supported (see below). ; #X text 33 761 Analog I/O; #X text 33 771 ----------; #X text 33 791 Analog inputs and outputs are treated as audio signals and; #X text 33 805 are addressed using the next 8 channels of the [adc~] and; #X text 33 819 [dac~] objects:; #X obj 36 845 adc~ 3 4 5 6 7 8 9 10; #X text 191 845 Analog Inputs 0 \, 1 \, 2 \, 3 \, 4 \, 5 \, 6 \, 7 ; #X text 191 875 Analog Outputs 0 \, 1 \, 2 \, 3 \, 4 \, 5 \, 6 \, 7 ; #X obj 36 875 dac~ 3 4 5 6 7 8 9 10; #X text 33 913 examples.; #X text 33 1101 MIDI; #X text 33 1111 ----; #X text 99 1131 and; #X obj 36 1130 notein; #X obj 125 1130 ctlin; #X text 183 1131 objects can be used to interface MIDI devices; #X text 33 1149 with the patch.; #X text 33 1164 Most MIDI devices can be plugged into the Beaglebone's USB; #X text 33 1178 port and can be used with these objects.; #X text 33 899 See the 'BasicAnalogIn' and 'BasicAnalogOut' projects for; #X text 33 1193 See the 'hello-midi' and 'midi-poly-synth' projects for more; #X text 33 1207 for examples.; #X obj 57 1268 print; #X text 33 1268 The; #X text 115 1268 object can be used to log messages directly to Bela's ; #X text 33 1286 terminal output (e.g. as viewable in the browser IDE). ; #X obj 100 1312 loadbang; #X obj 100 1356 print; #X msg 100 1334 Puredata says: 'Hello Bela!'; #X text 33 1251 ----------------; #X text 33 1241 Debugging: print; #X text 33 1401 ----------------; #X text 33 1391 Debugging: scope; #X text 33 1418 Any signal can be visualised using Bela's browser-based ; #X text 33 1432 scope. DAC channels 27 \, 28 \, 29 \, 30 address four separate; #X text 33 1446 scope channels.; #X obj 147 1519 dac~ 27 28 29 30; #X obj 79 1471 osc~ 440; #X obj 149 1471 noise~; #X obj 209 1471 osc~ 880; #X obj 209 1493 *~; #X text 33 1574 visualised.; #X text 33 1920 Compiling Puredata patches with Heavy; #X text 33 1930 -------------------------------------; #X text 33 1950 As an alternative to libpd \, Puredata patches can be; #X text 33 1964 converted into optimised C code using the Heavy Cloud ; #X text 33 1978 Compiler by Enzien Audio. The resulting code can result ; #X text 33 1992 in large increases in performance and is therefore well; #X text 33 2006 suited for complex patches and final stages of development. ; #X text 33 2020 We recommend to use libpd for prototyping and less CPU; #X text 33 2034 intensive patches.; #X text 33 2048 See our documentation to learn more about compiling patches; #X text 33 2061 using Heavy \, and visit enzienaudio.com for more info and; #X text 33 2075 a list of currently supported objects.; #X text 33 1611 Combining Pd and C++; #X text 33 1621 --------------------; #X text 33 1638 There are many cases where it is useful to combine Pd; #X text 33 1652 patches with C++ code \, for example when needing to ; #X text 33 1666 incorporate system calls (e.g. networking) or for; #X text 33 1680 sample-accurate dsp processes that are inconvenient ; #X text 33 1694 to program in Puredata.; #X text 33 1727 is used \, which functions as a libpd wrapper. It is ; #X text 33 1714 When running Puredata patches a template render.cpp file; #X text 33 1741 possible to modify this file when starting a new pd project.; #X text 33 1755 See the 'CustomRenderFile' example project for more info.; #X text 177 620 Sine Wave; #X obj 149 1493 *~ 0.1; #X obj 279 1471 osc~ 0.5; #X text 33 1560 click the scope button to see the above signals being ; #X text 33 1546 If you're viewing this patch using the Bela IDE you can; #X text 33 221 Patches can be drag-and-dropped into the browser IDE ; #X text 33 235 and will be added to the current project that is open. ; #X text 33 249 In order for the patch to run you need to fulfill the ; #X text 33 263 following two requirements:; #X text 59 285 a) The top-level patch needs to be named '_main.pd' ; #X text 77 298 (you can still use abstractions); #X text 59 315 b) Make sure there is no 'render.cpp' file inside; #X text 77 328 the project. A template file will be used instead; #X text 77 342 which acts as a wrapper for libpd.; #X text 77 355 Alternatively you can modify this wrapper and place ; #X text 77 368 it inside the project. See below for more information. ; #X text 33 61 Puredata patches can easily be run on Bela. There are two; #X text 33 75 ways of doing this: using libpd (which is compatible with; #X text 33 89 the browser-based IDE) or using the Heavy cloud compiler ; #X text 33 103 by Enzien Audio.; #X text 33 123 This guide focuses mainly on using libpd via the browser \,; #X text 33 137 however most of the functionality is compatible across both; #X text 33 151 solutions.; #X text 33 191 Loading and running patches in the Bela IDE; #X text 33 201 -------------------------------------------; #X text 33 531 Audio I/O; #X text 33 541 ---------; #X text 33 392 If you're viewing this inside the Bela IDE \, then you've ; #X text 33 406 noticed by now that all pd patches can be previewed within; #X text 33 420 the browser. Note \, however \, that patches cannot currently; #X text 33 434 be edited or interacted with inside this preview.; #X text 33 464 To view the contents of abstractions supplied with a ; #X text 33 477 project in the IDE \, simply go to the project navigator ; #X text 33 490 and open the corresponding patches from there.; #X text 33 951 Digital I/O; #X text 33 961 -----------; #X text 33 981 Digital pins can also be addressed from within a patch. ; #X text 33 994 Unlike analog pins \, digital pins can be set to work as; #X text 33 1007 inputs or outputs and can be read/written as signals or; #X text 33 1020 as messages.; #X text 33 1033 See the 'digital' example for instructions on how to ; #X text 33 1047 initialise \, read and write to digital pins as well as some; #X text 33 1060 usage examples; #X connect 2 0 3 0; #X connect 3 0 4 0; #X connect 3 0 4 1; #X connect 7 0 8 0; #X connect 7 1 8 1; #X connect 43 0 45 0; #X connect 45 0 44 0; #X connect 54 0 53 0; #X connect 55 0 83 0; #X connect 56 0 57 0; #X connect 57 0 53 2; #X connect 83 0 53 1; #X connect 84 0 57 1; #X connect 84 0 53 3;