[PD] New "fast-forward" message

[João Pais]

In my click tracker I use [array set] to generate the resulting audio in 
3 tracks (3 sources), and then zexy's [.] for amplitude scaling and 
iem_tab's [tab_add] to join all 3 tracks. iem_tab has also lots of other 
interesting things.

But that's all copy-paste, no audio processing (except with [.] )


> this sounds interesting. i've also successfully written to an array. 
> i've always liked this idea, it makes no sense to compute something 
> over and over again if you already know what's going to be computed. 
> playing back a bit stream from RAM is always going to be faster.
>
> i can have some fun with this and i know exactly the application to 
> use it for as i've (ab)used this sort of "render to sample" feature in 
> Renoise.
>
> On Mon, Aug 17, 2020 at 12:48 AM Alexandre Torres Porres 
> <porres at gmail.com <mailto:porres at gmail.com>> wrote:
>
>     I'm having so much fun, thanks!
>
>     working on a "batch record" abstraction now :)
>
>     I'm only now frustrated I can't batch record myself playing live,
>     for like, 5 minutes... maybe Miller will figure out a way of doing
>     so in 0.52 :)
>
>     Em dom., 16 de ago. de 2020 às 21:54, Christof Ressi
>     <info at christofressi.com <mailto:info at christofressi.com>> escreveu:
>
>         Hey,
>
>>         but I still needed an example to see how to make this happen :) 
>         Attached you find a simple example for recording N ms of sound
>         to disk.
>
>>         that's used n the help file of [samplerate~] but I agree it
>>         should also be included in this new documentaton section.
>>         Anyway, what else would you use it for?
>         It's useful for preventing "angry vline~s": if you
>         accidentally keep sending messaes to a [vline~] while DSP is
>         off, it will eventually bring Pd to its knees. The solution is
>         to use a [spigot] which is opened on "pd-dsp-started" and
>         closed on "pd-dsp-stopped".
>
>         Actually, the issue should be mentioned in vline~-help.pd,
>         together with the possible solution.
>
>         Christof
>
>         On 17.08.2020 02:25, Alexandre Torres Porres wrote:
>>
>>             On 16.08.2020 05:52, Miller Puckette via Pd-list wrote:
>>             > An artificial example (for simplicity) - I want to
>>             apply a Pd effect to a
>>             > soundfile and write the result out to another file,
>>             without having to wait
>>             > for the length of the file to get the result.  This
>>             could be done from the
>>             > command line using a batch command, but while you're
>>             developing the patch to
>>             > do it it's much easier to be able to set the process
>>             off with a button from
>>             > inside Pd.
>>
>>
>>         Great, kind of what I was expecting, but I still needed an
>>         example to see how to make this happen :)
>>
>>         Em dom., 16 de ago. de 2020 às 08:16, Christof Ressi
>>         <info at christofressi.com <mailto:info at christofressi.com>>
>>         escreveu:
>>
>>             My use case was that I had a patch which either produced
>>             some generative
>>             music or processed some soundfile and I wanted to record
>>             N seconds as
>>             fast as possible. It's basically like the render function
>>             in a DAW
>>             (usually you don't have to start the DAW from the command
>>             line to render
>>             your project :-).
>>
>>
>>         I also thought about that and I'm really excited to test both
>>         things. Hopefully I can have an example of this in my
>>         tutorial rght now and release an update. But my attempts here
>>         failed and froze Pd :)
>>
>>         Have you already messed with it, Christof?
>>
>>             But I agree that this needs to documented. Generally,
>>             there should be a
>>             section to document all (public) Pd messages, like [pd
>>             dsp(, [pd quit(,
>>             etc. (What can be considered "public"?)
>>
>>
>>         I opened an issue for that (
>>         https://github.com/pure-data/pure-data/issues/1125 ) and can
>>         take care of it as I'm usually handling documentation issues.
>>
>>             Also [r pd-dsp-started] and [r pd-dsp-stopped], which
>>             most people don't
>>             know about, I guess.
>>
>>
>>         that's used n the help file of [samplerate~] but I agree it
>>         should also be included in this new documentaton section.
>>         Anyway, what else would you use it for?
>>
>>         Porres
>

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