[PD] Simple Subtractive Synth filter envelope

Ingo ingo at miamiwave.com
Wed Nov 24 07:04:46 CET 2010


Hi Samuel,

as an alternative to [phasor~] you could try either [creb/blosc~ saw] or the
one Roman Haefeli just suggested:

>If you're after a cheap band-limited saw generator, check this out:
>https://github.com/reduzent/pd-bloscabs

>It's pure vanilla and cpu-wise not much more expensive than [tabosc4~].

Ingo

________________________________________
Von: samuel rowe [mailto:samueldavidrowe at hotmail.co.uk] 
Gesendet: Mittwoch, 24. November 2010 00:39
An: ingo at miamiwave.com
Betreff: RE: AW: [PD] Simple Subtractive Synth filter envelope

Hi Ingo

Thanks for the help, I've been a bit busy today, but I will try your idea
tomorrow and let you know how I get along with it
I was wondering if there was a different sawtooth to phasor, it does sound
terribly artificial

Thank you

Samuel

> From: ingo at miamiwave.com
> To: jbturgid at hotmail.com; pimassat at gmail.com;
samueldavidrowe at hotmail.co.uk
> CC: pd-list at iem.at
> Subject: AW: [PD] Simple Subtractive Synth filter envelope
> Date: Tue, 23 Nov 2010 07:32:48 +0100
> 
> Here's what I would do based on your example. Of course there are many
> options of using envelope objects.
> I would also suggest to use something else than [phasor~] because of
> aliasing problems.
> 
> Ingo
> 
> 
> ________________________________________
> Von: pd-list-bounces at iem.at [mailto:pd-list-bounces at iem.at] Im Auftrag von
> Andrew Faraday
> Gesendet: Montag, 22. November 2010 23:36
> An: pimassat at gmail.com; samueldavidrowe at hotmail.co.uk
> Cc: pd-list at iem.at
> Betreff: Re: [PD] Simple Subtractive Synth filter envelope
> 
> hello samuel
> 
> [vcf~] is probably the way to go.
> 
> you can also cheat a little using [envgen] which is a graphic envelope
> generator, currently set between 0 and 1. The documentation isn't perfect,
> but these are the messages you need to know.
> 
> [0 50 1 50 ( <--- slightly different syntax from [line] or [line~], it
goes,
> target (first one's instant), gap, target, gap etc.
> 
> [duration 5000( < --- changes the duration of your envelope without
changing
> the shape.
> 
> a bang outputs the messages for [line] or [line~] or [vline~].
> 
> you can also draw your envelope manually.
> 
> 
> This is useful if you don't want to spend much time on sorting out your
> envelope generator. Oh, and the 0 to 1 problem. In audio you'll have to do
> some arithmetic, but if you use a signal line you can use [range 0 1 X X]
> replacing the x's with the upper and lower limit you want for your
filters. 
> 
> Hope this helps
> 
> Andrew
> 
> P.S. to convert the audio 0 - 1 to a range you want, use 
> 
> [line~]
> |
> [*~ (the size of your range)]
> |
> [+~ (the lower limit of your range)]
> 
> 
> 
> ________________________________________
> Date: Mon, 22 Nov 2010 23:10:47 +0100
> From: pimassat at gmail.com
> To: samueldavidrowe at hotmail.co.uk
> CC: pd-list at iem.at
> Subject: Re: [PD] Simple Subtractive Synth filter envelope
> 
> 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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