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/usr/share/puredata/doc/3.audio.examples/B03.tabread4.pd is in puredata-doc 0.47.1-3.

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#X text 25 360 The tabread4~ module is available for situations requiring
more control than tabosc4~ offers. The relationship between the two
is the same as between cos~ and osc~ \, although the units are different
between cos~ and tabread4~. Cos~ assumes input is normalized from 0
to 1 (and will wrap around as needed.) Tabread4~ takes values from
1 to n-2 where n is the number of points in the table-- for a 259-point
table such as we have here \, it's 1 to 129 (so the "good" segment
is 128 samples long.);
#X text 30 508 You would use tabread4~ (as opposed to tabosc4~) if
you need direct control of the phase \, for instance if you to advance
nonlinearly through the table. In the case shown here \, the "squeeze"
factor makes the phase grow to a value at least \, and possibly much
graeater than \, 129 (to which tabread4~ then limits it). So the resulting
waveform is compressed in time.;
#X obj 250 128 +~ 128;
#X text 554 624 updated for Pd version 0.37;
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