Re: A midifile player for pd that can scratch ?

>> 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.

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