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#X text 12 85 LIBRARY internal;
#X text 12 125 WEBSITE http://crca.ucsd.edu/~msp/;
#X text 12 25 LICENSE SIBSD;
#X text 12 105 AUTHOR Miller Puckette;
#X text 12 165 HELP_PATCH_AUTHORS Dave Sabine \, May 5 \, 2003 . Jonathan
Wilkes revised the patch to conform to the PDDP template for Pd version
0.42.;
#X text 12 5 KEYWORDS signal conversion;
#X text 12 45 DESCRIPTION audio output;
#X text 12 65 INLET_n signal;
#X text 12 145 RELEASE_DATE 1997;
#X restore 500 597 pd META;
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#X text 8 2 [dac~] Related Objects;
#X obj 63 42 switch~;
#X text 115 42 [block~];
#X text 20 65 (Note: having a [block~] and a [switch~] in the same
window causes an error \, which is why [block~] is shown above as a
comment.);
#X text 20 117 Externals;
#X text 19 142 [shoutcast~];
#X text 106 142 [oggcast~];
#X text 181 142 [mp3cast~];
#X obj 174 42 throw~;
#X obj 226 42 catch~;
#X obj 278 42 send~;
#X obj 322 42 receive~;
#X obj 23 42 adc~;
#X restore 101 597 pd Related_objects;
#X obj 465 20 pddp/pddplink http://wiki.puredata.info/en/dac~ -text
pdpedia: dac~;
#X obj 492 3 dac~;
#X text 109 133 default stereo signals: same as;
#X text 198 221 all channels on an 8-channel device;
#X obj 65 133 dac~;
#X obj 367 135 dac~ 1 2;
#X obj 65 160 dac~ 5;
#X text 123 159 a mono signal to channel 5;
#X obj 65 191 dac~ 1 3 8 6 11 15 19 22 23 24 36;
#X text 280 191 11 channels of output;
#X obj 65 221 dac~ 1 2 3 4 5 6 7 8;
#X text 98 359 (none);
#X text 98 267 signal;
#X text 168 401 - the object defaults to 2 outgoing audio channels
(usually a left and right stereo pair). Any number of arguments (integers)
can be used to define multiple output channels - each integer corresponds
to an output channel on your audio hardware.;
#X text 168 267 - the number of inlets correspond with the number of
arguments - each inlet represents an output channel on your audio hardware
which corresponds to the argument you provide. If no arguments are
provided \, then there are two inlets which represent audio channels
1 and 2 on your computer's sound card.;
#X text 98 475 [dac~] is an acronym meaning "Digital/Analog Converter
Signal" and is Pd's interface to send audio information to the audio
channels of your soundcard(s).;
#N canvas 37 90 428 471 Multi-channel_audio 0;
#X text 19 38 All sound cards are capable of at least two channels
of audio. Pd supports these two channels by default and uses your system's
generic audio drivers to communicate with your hardware. However \,
for faster input/output and for more than two channels of audio \,
PD incorporates the use of "PortAudio" which uses ASIO drivers to communicate
with your hardware. So \, to instruct Pd to use more than two channels
of audio \, your command line should read like below:;
#X text 80 145 c:/pd/bin/pd.exe -pa -inchannels 8 -outchannels 8;
#X text 19 174 The "-pa" switch means "PortAudio". This switch is new
as of Pd version 0.37 TEST 4 and replaces the old "-asio" switch.;
#X text 19 234 The "-inchannels" and "-outchannels" switches can be
summarized by using "-channels 8" because currently PortAudio requires
that the number of incoming and outgoing channels must be equal. This
may change in the Pd's future...;
#X text 19 314 To further optimize Pd's usage of your audio hardware
\, you can explore the following:;
#X text 29 355 - audiobuf;
#X text 30 373 - blocksize;
#X text 29 389 - audioindev;
#X text 29 407 - audiooutdev;
#X text 25 433 With the right hardware \, Pd can manage audio input
and output with lower than 10 milliseconds of latency.;
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#X text 7 2 [dac~] Multi-channel Audio;
#X restore 101 545 pd Multi-channel_audio;
#X text 80 401 n) float;
#X obj 4 597 pddp/pddplink all_about_help_patches.pd -text Usage Guide;
#X obj 66 51 osc~ 880;
#X obj 66 80 *~;
#X obj 66 106 *~ 0.1;
#X obj 96 80 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1 0 1
;
#X obj 455 51 pddp/dsp;
#N canvas 84 189 428 347 sample_rate 0;
#X text 19 37 [adc~] and [dac~] always operate at the sample rate that
is specified in Pd's command line. By default \, the sample rate is
44100 hz. But Pd operates any sample rate supported by standard audio
hardware. Sample rates cannot be changed at run-time in Pd \, but must
be stated in the command line when Pd is instantiated. As well \, two
or more instances of Pd running simoultaneously can each be using different
sample rates! Having said that \, Pd can easily upsample or downsample
by using the [block~] object. Here are some example of the common sample
rates:;
#X text 19 191 c:/pd/bin/pd.exe -r 11025;
#X text 19 221 c:/pd/bin/pd.exe -r 22050;
#X text 19 281 c:/pd/bin/pd.exe -r 88200;
#X text 19 176 c:/pd/bin/pd.exe -r 8000;
#X text 19 206 c:/pd/bin/pd.exe -r 16000;
#X text 19 236 c:/pd/bin/pd.exe -r 32000;
#X text 19 251 c:/pd/bin/pd.exe -r 44100 CD Quality;
#X text 19 266 c:/pd/bin/pd.exe -r 48000 DAT Quality;
#X text 19 311 c:/pd/bin/pd.exe -r 192000 DVD-Audio Quality;
#X text 19 296 c:/pd/bin/pd.exe -r 96000 DVD-Video/Audio Quality;
#X obj 1 1 cnv 15 425 20 empty \$0-pddp.cnv.subheading empty 3 12 0
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#X text 7 2 [dac~] Sample Rate;
#X restore 101 520 pd sample_rate;
#N canvas 99 375 428 211 defeating_audio_computation 0;
#X text 19 37 There may be cases when you do not want Pd to send or
receive audio signal with your soundcard. You can manually disable
the [dac~] and [adc~] objects separately using the "-nodac" and "-noadc"
switch \, or disable both using the "-nosound" switch.;
#X obj 1 1 cnv 15 425 20 empty \$0-pddp.cnv.subheading empty 3 12 0
14 -204280 -1 0;
#X text 7 2 [dac~] -nodac and -noadc;
#X restore 101 570 pd defeating_audio_computation;
#X text 117 79 <- Click to test;
#X text 11 23 audio output;
#X connect 28 0 29 0;
#X connect 29 0 30 0;
#X connect 30 0 13 0;
#X connect 31 0 29 1;