Re: A midifile player for pd that can scratch ?

Winfried Ritsch <[email protected]> Fri, 09 Aug 2024 21:42:17 +0200
Newsgroups	gmane.comp.multimedia.puredata.general
Organization	Institut für Elektronische Musik und Akustik
Message-ID	<2335981.iZASKD2KPV@ras>
Thanks for the info,

The piano roll score looks nice, is this a library object, where can I find 
this.

Tracing data also backwards would be a solution, have to look.
Midifiles for ensemble mecanique have up to 1 million notes, so effiiency might 
be an issue.

mfg winfried

Am Freitag, 9. August 2024, 12:52:37 CEST schrieb João Pais:
> >> how about a patch that reads the midifile and stores the data, which you
> >> then play as you wish? for an instalation I'm working on, I prepared a
> >> patch that reads a midifile with +50K events, puts them into a data
> >> structures "score", and then the info can be used for playback. It's not
> >> "one object", but it does what you wish.
> > 
> > Thanks, using data structures is a nice idea. Somehow once (15+ years ago)
> > used them but where slow doing tracing objects, but maybe the new
> > implementation is more usable.
> > 
> > The problem is how to handle noteon/off in reverse, there should be
> > different modes. So mabe I store it in reverse order in another text.
> 
> which new implementation? :)
> 
> I'm not sure if I know of any changes in the drawing, but I might be
> wrong. anyway this only affects the result if a) you need to see the
> structs (if you don't, there is no lag) and b) even if you need to see
> them, you might notice something only when opening the canvas for the
> first time, afterwards is no issue. My patches usually have a reading
> point marker for live visualisation as well, and doesn't affect the
> performace.
> 
> Making 2 score versions (forward + backward) might be the best idea as
> well - it's not that hard to do a forward-playing patch, but since
> [pointer] doesn't have a "previous" method, it would need lots of
> creative thinking and calculations to make that happen (although surely
> possible). Using "next" in a reversed score makes it much simpler.
> 
> Here is a picture of a small section of my canvas, for reference.
> 
> Joao
> 
> > mfg winfried
> > 
> >>> so a midifile  can be played forwards backwards with dynamic tempo.
> >>> 
> >>> If not, then maybe a message sequencer, e.g. a "text" object, otherwise
> >>> I'll probably have to write one myself...
> >>> 
> >>> and yes, I know it's not as trivial as it sounds, especially the
> >>> midifile
> >>> player.
> >>> 
> >>> I would be grateful for any advice.


-- 
- ao.Univ.Prof. DI Winfried Ritsch 
- [email protected] - http://iem.at/ritsch
- Institut fuer Elektronische Musik und Akustik,  University of Music and 
Dramatic Art Graz
- mobil: ++43-664-2439369 Tel. ++43-316-389-3510 (3170)

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