[PD] Simple Subtractive Synth filter envelope

[Pierre Massat]

Would this do?

You should be aware that there is a difference between "message" and "audio"
inlets (different color). The sound may be very diffrent depending on the
type of inlet an audio object has if you want to change a parameter
dynamically. This is particularly relevant for filters. Check the difference
between [bp~] and [vcf~].

Pierre

2010/11/22 samuel rowe <samueldavidrowe at hotmail.co.uk>

>  Hi
>
> I'm relatively new to PD, but I've been working with hardware synthesizers
> for years now, and I've used SynC to build synths on my computer, *and*I'm doing an Audio Technology degree, so I'm not clueless on the subject.
> However, I'm trying to build a simple subtractive synth where I press a
> PutBang which triggers an envelope generator with ADSR to alter the filter
> cutoff, and I just can't work out how to do it. No-one at my university
> program in pd or max, so I have had to search the internet for help. I've
> read these two pages
>
> http://obiwannabe.co.uk/html/music/6SS/six-simple-synthesisers.html
> http://en.flossmanuals.net/PureData/SimpleSynth
>
> and whilst the vline object on the flossmanuals site is fine when altering
> the envelope of an overtone in an additive synth, the output will not feed
> into the argument for a filter cutoff value. I can't even get the "attack
> decay" generator on the first site to work, let alone figure out how to
> alter it's seemingly inefficient design to allow sustain and release.
>
> I know this is quite trivial compared to some of the things that get posted
> in the mailing list, I would really appreciate it if anyone could help me,
> or point me in the right direction. I've spent too many nights scouring the
> internet and trying to work it out for myself, but I've simply hit a brick
> wall.
>
> Thank you in advance
>
> Samuel
>
> p.s. this is the text for the file i have been working on, it's a little
> bit messy and doesn't seem to work properly. BE CAREFUL, IT MAKES A THUMP
> WHEN OPENED, TURN OFF "COMPUTE AUDIO"
>
> #N canvas 366 35 610 629 10;
> #X obj 106 485 dac~;
> #X obj 94 115 phasor~;
> #X floatatom 104 77 5 0 0 0 - - -;
> #X obj 231 154 bng 15 250 50 0 empty empty
> hit_to_trigger_envelope_and_make_sound
> 17 7 0 10 -262144 -1 -1;
> #X obj 152 116 phasor~;
> #X obj 109 175 +~;
> #X obj 151 140 -~ 0.5;
> #X obj 96 140 -~ 0.5;
> #X obj 167 96 *~;
> #X floatatom 182 30 5 -25 25 1 osc2_detune - -;
> #X obj 182 75 +~ 1;
> #X obj 181 52 /~ 10000;
> #X obj 207 258 del;
> #X obj 200 321 0 \$1;
> #X obj 273 324 1 \$1;
> #X obj 235 357 line;
> #X floatatom 331 175 5 0 0 1 attack_value? - -;
> #X floatatom 337 228 5 0 0 1 decay_value? - -;
> #X obj 110 376 lop~ 3000;
> #X obj 110 403 lop~ 3000;
> #X obj 110 427 lop~ 3000;
> #X obj 110 451 lop~ 3000;
> #X obj 214 203 t b b;
> #X obj 254 196 t f f;
> #X obj 206 288 f 50;
> #X obj 249 287 f 50;
> #X obj 217 391 + 20;
> #X connect 1 0 7 0;
> #X connect 2 0 1 0;
> #X connect 2 0 8 0;
> #X connect 3 0 22 0;
> #X connect 4 0 6 0;
> #X connect 5 0 18 0;
> #X connect 6 0 5 1;
> #X connect 7 0 5 0;
> #X connect 8 0 4 0;
> #X connect 9 0 11 0;
> #X connect 10 0 8 1;
> #X connect 11 0 10 0;
> #X connect 12 0 24 0;
> #X connect 13 0 15 0;
> #X connect 14 0 15 0;
> #X connect 15 0 26 0;
> #X connect 16 0 23 0;
> #X connect 17 0 24 1;
> #X connect 18 0 19 0;
> #X connect 19 0 20 0;
> #X connect 20 0 21 0;
> #X connect 21 0 0 0;
> #X connect 21 0 0 1;
> #X connect 22 0 12 0;
> #X connect 22 1 25 0;
> #X connect 23 0 12 1;
> #X connect 23 1 25 1;
> #X connect 24 0 13 0;
> #X connect 25 0 14 0;
> #X connect 26 0 18 1;
> #X connect 26 0 19 1;
> #X connect 26 0 20 1;
> #X connect 26 0 21 1;
>
>
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