puredata-extra 0.46.7-3 / usr / lib / puredata / extra / fiddle~ / fiddle~-help.pd

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#X obj 281 666 print attack;
#X obj 190 666 print pitch;
#X msg 555 45 \; pd dsp 1;
#X text 460 39 click here;
#X text 460 61 to start DSP;
#X text 226 4 FIDDLE - pitch estimator and sinusoidal peak finder;
#X text 8 70 The Fiddle object estimates the pitch and amplitude of
an incoming sound \, both continuously and as a stream of discrete
"note" events. Fiddle optionally outputs a list of detected sinusoidal
peaks used to make the pitch determination. Fiddle is described theoretically
in the 1998 ICMC proceedings \, reprinted on http://man104nfs.ucsd.edu/~mpuckett.
;
#X text 8 170 Fiddle's creation arguments specify an analysis window
size \, the maximum polyphony (i.e. \, the number of simultaneous "pitches"
to try to find) \, the number of peaks in the spectrum to consider
\, and the number of peaks \, if any \, to output "raw." The outlets
give discrete pitch (a number) \, detected attacks in the amplitude
envelope (a bang) \, one or more voices of continuous pitch and amplitude
\, overall amplitude \, and optionally a sequence of messages with
the peaks.;
#X text 8 296 The analysis hop size is half the window size so in the
example shown here \, one analysis is done every 512 samples (11.6
msec at 44K1) \, and the analysis uses the most recent 1024 samples
(23.2 msec at 44K1). The minimum frequency that Fiddle will report
is 2-1/2 cycles per analysis windows \, or about 108 Hz. (just below
MIDI 45.);
#X text 669 535 number of pitch outlets (1-3 \, default 1);
#X text 669 557 number of peaks to find (1-100 \, default 20);
#X text 669 579 number of peaks to output (default 0.);
#X msg 441 107 amp-range 40 50;
#X msg 439 227 reattack 100 10;
#X msg 438 282 npartial 7;
#X msg 438 170 vibrato 50 0.5;
#X text 560 91 a low and high amplitude threshold: if signal amplitude
is below the low threshold \, no pitches or peaks are output. The high
threshold is a minimum at which "cooked" outputs may appear.;
#X text 560 152 A period in milliseconds (50) over which the raw pitch
may not deviate more than an interval in half-tones (0.5) from the
average pitch to report it as a note to the "cooked" pitch outlet.
;
#X text 560 213 A period in milliseconds (100) over which a re-attack
is reported if the amplitude rises more than (1) dB. The re-attack
will result in a "bang" in the attack outlet and may give rise to repeated
notes in the cooked pitch output.;
#X text 142 432 test input pitch;
#X text 330 444 test input;
#X text 330 457 amplitude;
#X obj 410 545 fiddle~ 1024 1 20 3;
#X text 538 690 individual sinusoidal components;
#X text 466 688 amplitude;
#X text 476 703 (dB);
#X text 389 688 raw pitch;
#X text 376 712 and amplitude;
#X text 364 729 (up to 3 outputs);
#X text 287 686 bang on;
#X text 287 708 attack;
#X text 185 686 cooked pitch;
#X text 202 703 output;
#X text 545 545 ------ arguments:;
#X msg 262 412 57;
#X msg 440 331 auto 1;
#X msg 440 353 auto 0;
#X msg 439 418 bang;
#X text 561 416 poll current values --- useful if not in auto mode
\,;
#X text 560 274 Higher partials are weighed less strongly than lower
ones in determining the pitch. This specifies the number of the partial
(7) which will be weighted half as strongly as the fundamental.;
#X text 560 335 start and stop "auto" mode (on by default.) If off
\, output only appears on "bang" (poll mode).;
#X text 561 448 print out all settings;
#X text 669 513 window size (128-2048 \, default 1024);
#X msg 440 375 npoints 2048;
#X text 562 384 number of points in analysis window (power of 2 \,
128-2048);
#X msg 439 396 npoints 1024;
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