path: root/doc/pddp/sigmund~-help.pd

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#X text 12 115 LIBRARY internal;
#X text 12 155 WEBSITE http://crca.ucsd.edu/~msp/;
#X text 12 25 LICENSE SIBSD;
#X text 12 135 AUTHOR Miller Puckette;
#X text 12 195 HELP_PATCH_AUTHORS Updated for Pd v0.41. Revised by
Jonathan Wilkes to conform to the PDDP template for Pd version 0.42.
;
#X text 12 45 DESCRIPTION sinusoidal analysis and pitch tracking;
#X text 12 65 INLET_0 list signal npts hop npeak maxfreq vibrato stabletime
minpower growth print;
#X text 12 95 OUTLET_N float list;
#X text 12 175 RELEASE_DATE;
#X text 12 5 KEYWORDS signal analysis;
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#X text 8 2 [sigmund~] Related Objects;
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#X text 99 204 list;
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#X text 11 23 sinusoidal analysis and pitch tracking;
#X obj 474 3 sigmund~;
#X obj 445 20 pddp/pddplink http://wiki.puredata.info/en/sigmund~ -text
pdpedia: sigmund~;
#X text 98 187 signal;
#X text 148 187 - the incoming signal to be analyzed.;
#X text 98 249 npts - number of points in each analysis window (1024)
;
#X text 98 263 hop - number of points between each analysis (512);
#X text 98 276 npeak - number of sinusoidal peaks (20);
#X text 98 304 vibrato - depth of vibrato to expect in 1/2-tones (1)
;
#X text 98 318 stabletime - time (msec) to wait to report notes (50)
;
#X text 98 332 minpower - minimum power (dB) to report a pitch (50)
;
#X text 98 347 growth - growth (dB) to report a new note (7);
#X text 98 290 maxfreq - maximum sinusoid frequency in Hz. (1000000)
;
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#X text 20 38 If invoked with the "-t" flag (as a creation argument)
\, sigmund~ analyzes waveforms stored in arrays. Instead of an incoming
signal \, feed it "list" messages with the following arguments:;
#X text 38 92 table name (a symbol);
#X text 39 111 number of points;
#X obj 23 319 sigmund~ -t -npeak 10 -maxfreq 5000 peaks;
#X text 38 132 index of first point;
#X text 38 153 sample rate;
#X text 38 174 debug flag (print debugging info if nonzero);
#X text 20 197 In this mode \, only the "env" \, "pitch" \, and "peaks"
outputs are meaningful.;
#X text 21 230 click here to test:;
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#X text 8 2 [sigmund~] Using on arrays;
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#X obj 39 113 phasor~;
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#X floatatom 38 158 5 0 0 1 pitch - -;
#X floatatom 203 158 5 0 0 1 envelope - -;
#X obj 39 91 mtof;
#X obj 39 66 69;
#X obj 38 136 sigmund~ -hop 4096 pitch env;
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#X msg 22 74 print;
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#X msg 32 117 minpower \$1;
#X obj 22 143 sigmund~ -minpower 40;
#X text 19 164 npts: number of points used in an analysis. Must be
a power of two \, at least 128 The minimum frequency that can be tracked
is about 2(sample_rate)/npts.;
#X text 19 203 hop: number of points between analyses. Must be a power
of two \, at least the DSP vector size (usually 64). This regulates
the number of analyses done per unit of time.;
#X text 19 292 npeak: maximum number of sinusoidal peaks to look for.
The computation time is quadratic in the number of peaks actually found
(this number only sets an upper limit). Use it to balance CPU time
with quality of results.;
#X text 19 342 maxfreq: maximum frequency of sinusoidal peaks to look
for. This can be useful in situations where background noise creates
high-frequency \, spurious peaks..;
#X text 19 381 vibrato: maximum deviation from "pitch" to accept as
normal vibrato (affects "notes" output only). If the value is too small.
vibratos will appear as trills. If too large \, very small melodic
intervals may not be reported as new notes.;
#X text 19 431 stabletime: time period to wait before reporting a note
(affects "notes" output only). The "pitch" must be present and must
not vary more than "vibrato" for this entire period to report a note.
If too large \, the "notes" will be unnecessarily delayed. If too small
\, spurious notes get output.;
#X text 19 503 minpower: minimum measured RMS level to report a pitch
(affects "pitch" and "notes" output only). Signals quieter than this
will be assumed to be crosstalk and ignored.;
#X text 19 542 growth: minimum measured RMS growth to report a new
note (affects "notes" output only). The RMS level must rise by this
many dB (within a time period given by "stabletime") to report a repetition
of a note at or near the previously output pitch.;
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#X text 19 31 Note: the following "parameters" can be sent to [sigmund~]
as messages \, or provided as creation arguments by prefixing each
selector with a dash (i.e. \, -minpower 40):;
#X text 40 242 * Note: The npts and hop parameters are in samples \,
and are powers of two. The example above specifies a huge hop of 4096
(to slow the output down) and to output "pitch" and "env". (Those are
the default outputs.);
#X text 8 2 [sigmund~] Setting Parameters;
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#X restore 152 393 pd setting-parameters;
#X text 108 504 pitch - output pitch continuously;
#X text 108 555 tracks - output sinusoidal peaks organized into tracks
;
#X text 108 517 notes - output pitch at the beginning of notes;
#X text 108 542 peaks - output all sinusoidal peaks in order of amplitude
;
#X text 108 529 env - output amplitude continuously;
#X text 100 82 The [sigmund~] object analyzes an incoming sound into
sinusoidal components \, which may be reported individually or combined
to form a pitch estimate. Possible outputs are specified as creation
arguments:;
#X text 149 204 - [sigmund~] accepts a list to access waveforms stored
in arrays. See the "Using_with_array" subpatch below.;
#X text 148 420 One outlet is created for each creation argument (listed
under the heading "arguments");
#X text 98 374 See the subpatch below for more info on these parameters:
;
#X text 98 452 (optional) In addition to flags (see subpatch "setting-parameters"
above) \, [sigmund~] can take up to five arguments \, in any order
\, to specify its output. Each creates (and corresponds to) an outlet.
;
#X text 98 360 print - prints current setting to the console.;
#X obj 4 597 pddp/pddplink all_about_help_patches.pd -text Usage Guide
;
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#X obj 74 195 sigmund~ -npeak 10 peaks;
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#X text 269 383 frequency (Hz.);
#X text 290 350 peak amplitude (linear);
#X text 322 324 cosine component;
#X text 343 298 sine component;
#X text 79 413 loudest partial;
#X text 216 413 quietest partial;
#X text 36 4 You can ask for sinusoidal peaks in decreasing order of
amplitude or arranged into maximally continuous tracks for resynthesis.
(Or you can ask for both.) If you ask for peaks \, out come lists of
five numbers \, one for each sinusoid at each analysis period. The
first is the index number of the sinusoid (so you can use "route" to
claw them apart). The other four are as shown:;
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#X text 35 443 If you ask for "tracks" \, the output is four numbers:
index \, frequency \, and amplitude as before \, and finally a flag
which is one for a new track \, zero for a continuation \, minus one
for an empty track.;
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#X text 99 433 list;
#X text 98 419 float;
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