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/usr/share/puredata/doc/3.audio.examples/B06.table.switching.pd is in puredata-doc 0.45.4-1.

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#X text 96 114 show level;
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#X restore 156 327 pd output;
#X msg 232 300 MUTE;
#X text 581 481 updated for Pd version 0.34;
#X text 33 8 SWITCHING BETWEEN TABLES;
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#X text 20 51 During a performance you're unlikely to want to draw
or recalculate wavetables on the fly \, because you don't want to give
Pd computationally intensive atomic tasks that could make Pd miss a
DAC deadline. Instead \, use "set" mesages to switch tabosc~ or tabread4~
between pre-prepared tables. Indeed \, you will eventually want to
save screen space by throwing all your wavetables in a subpatch somewhere.
;
#X obj 161 401 table waveshape15c 131;
#X text 41 362 There's also a "text object" hook so that you can have
arrays with parametrizable names and sizes:;
#X text 31 431 You would use this if you want to include one or more
arrays in an abstraction. In this invocation you can't save the state
of the array--instead \, juts read it in from a file or calculate it
at startup.;
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