Assemble message from several MIDI CC messages to send to [vline~] ADSR

Reply to Assemble message from several MIDI CC messages to send to [vline~] ADSR on Mon, 24 Jan 2022 21:58:50 GMT

chrisby — Mon, 24 Jan 2022 21:58:50 GMT

I am trying to control a simple [vline~] ADSR with a MIDI controller. Building the ADSR was easy - it's basically just the [vline~] object. But how can I achieve the following:

I have a MIDI controller with 4 sliders. I want each single slider to be the value for A, D, S and R levels. I am aware of the [ctlin] object. But how would I assemble a message like ([slider1] 1000, [slider2] 1000 1000, [slider3] 1000 3000, [slider4]) ?

Thanks for any help!

Reply to Assemble message from several MIDI CC messages to send to [vline~] ADSR on Mon, 24 Jan 2022 22:20:03 GMT

bocanegra — Mon, 24 Jan 2022 22:20:03 GMT

Here's the simplest ADSR routine I could come up with in a hurry:

ADSR_Example.pd

Reply to Assemble message from several MIDI CC messages to send to [vline~] ADSR on Tue, 25 Jan 2022 00:00:12 GMT

bocanegra — Tue, 25 Jan 2022 00:00:12 GMT

Ok so, my mash-up has some serious flaws. First of all the sustain part does not account the magnitude for the midi controller being > 1 most of the time >.<

Second, as is, you can only set attack/decay/release times to midi numbers ranging from 0 to 127 (ms). So here's a fix for that:

ADSR.zip

The [MinMax] module is a small abstraction included in the .zip. You could add any kind of math where the scaling is done. For example some sort of log-ish bending of the midi input might be useful, and since all controller values are now normalized, this should trivial.

Apologies for not getting it right the first time

Reply to Assemble message from several MIDI CC messages to send to [vline~] ADSR on Tue, 25 Jan 2022 19:02:40 GMT

chrisby — Tue, 25 Jan 2022 19:02:40 GMT

@bocanegra Hey, thank you so much for this!! I gathered that [pack] could be a solution, but I am pretty new to PD (thankfully not to programming or electronics) and it's pretty hard to find good documentation. I will give your solution a try, thank you again!

Reply to Assemble message from several MIDI CC messages to send to [vline~] ADSR on Tue, 25 Jan 2022 20:14:34 GMT

bocanegra — Tue, 25 Jan 2022 20:14:34 GMT

@chrisby you are welcome. I am just happy I didn't blow up your speakers with my first attempt

On a side note, this ADSR is pretty basic and lacking in features. Among other things it would be preferable to have exponential curves on each segment like most analog synths...

Reply to Assemble message from several MIDI CC messages to send to [vline~] ADSR on Tue, 25 Jan 2022 23:30:10 GMT

ddw_music — Tue, 25 Jan 2022 23:30:10 GMT

@bocanegra said:

Among other things it would be preferable to have exponential curves on each segment like most analog synths...

Just last week I made a lincurve~ abstraction, http://github.com/jamshark70/hjh-abs (if I'm writing the address correctly from memory).

Btw the gymnastics at the top could be simplified a bit by [swap], no?

hjh

Reply to Assemble message from several MIDI CC messages to send to [vline~] ADSR on Tue, 25 Jan 2022 23:53:42 GMT

bocanegra — Tue, 25 Jan 2022 23:53:42 GMT

@ddw_music said:

Just last week I made a lincurve~ abstraction, http://github.com/jamshark70/hjh-abs (if I'm writing the address correctly from memory).

yes, I remember. I use similar concoctions of my own.

Btw the gymnastics at the top could be simplified a bit by [swap], no?

Yes, but for didactic reasons I think the trigger is more appropriate (transparent).