[PD] How to add/remove MIDI notes from a list using MIDI in and note on/off?

[patrice colet]

Hope I'm not wasting your time by trying to resolve this question, it's 
just a fun to give a try by using only vanilla objects.

I've made a big mistake in patching, and corrected it by reversing the 
[list-find] inlets, sorry for that.
Correction and improvements are attached.


Le 12/11/2014 12:19, JC Pedroza a écrit :
> You are right, I forgot to include the details! I'm very sorry.
>
> I need this for a sequencer/synth that queries the list for a random note, at random times, in a given time range. That random note is then used to set the frequency of a synth (from an array of synths). It's a bunch of randomness.
>
> At the start I was just writing the values into the list, but eventually wanted something more dynamic.
>
> The idea is for the input to be any MIDI input. DAW, sequencer, external MIDI keyboard, whatever. Anything that inputs MIDI note messages. By "notes being pressed" I just mean MIDI note-on. The rate of notes pressed is the more the better just for having the option to go crazy, but a rate of a "very fast human" should be more than enough.
>
> You can find the sequencer/synth in question here: http://github.com/JCPedroza/puredata/tree/master/synths/Cloud1 . Cloud1 is the main patch, and synthcell is a synthesizer abstraction. You can find my solution to the list of MIDI note-on in subpatch path: [pd Cloud1] / [pd freq_list] / [pd list-MIDInoteon] .
>
> ----------------------------------------
>> Date: Wed, 12 Nov 2014 11:38:52 +0100
>> From: lorenzofsutton at gmail.com
>> To: pd-list at lists.iem.at
>> Subject: Re: [PD] How to add/remove MIDI notes from a list using MIDI in and note on/off?
>>
>>
>> On 11/11/2014 13:53, JC Pedroza wrote:
>>> I need to populate a list with the MIDI notes that are being pressed, and remove the note from the list when the key is released.
>> Just a side comment as various people already responded.
>>
>> In theese cases it would help to describe your use case with as much
>> detail as possible, unless the question is really trivial.
>> If you explain _why_ you want to store/remove incoming midi notes in a
>> list it helps because maybe there is a different/similar approach to
>> ahieve the same result... Otherwise people (like e.g. patrice) have to
>> guess what the scenario is and without detailed background it's really
>> difficult.
>>
>> - Where are the midi notes being pressed? An external midi keyboard?
>> - What is the list of (pressed) midi notes used for?
>> - What's your expected rate of notes pressed e.g. per second (one, tens,
>> houndreds, millions??)
>>
>> etc. etc.
>>
>> :-)
>> Lorenzo.
>>> One idea is to use [notein], and if the velocity is> 0 then add the note to the list, and if the velocity == 0 then remove the note from the list. But I have no idea of how to implement this.
>>>
>>> I think I need [list-extend], [list-find], and [list-delete], but I just can't figure out an implementation.
>>>
>>> How can I do this?
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>>
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