----- Original Message -----
> From: Mathieu Bouchard <[email protected]>
> To: Charles Goyard <[email protected]>
> Cc: [email protected]
> Sent: Thursday, November 10, 2011 11:27 AM
> Subject: Re: [PD] Interruption of audio / Loading sound into array
>
[...]
> (this doesn't
> take ~-objects into account, who use a different execution model)
breadth-first?
>
>> Of course that's not true, pure-data is more of a multiplexed
> state-machine, just like an ethernet network. [...] Does "switched
> state-machine" sounds good to define pd's core ?
>
> Well... sounds like a math undergrad exercise of fitting any state transition
> model onto a possibly infinite-by-infinite matrix and then try to multiply it
> by
> an infinite vector of markov chain state probabilities, using limits and
> stuff.
> I vaguely remember doing this in 2nd year at UdeM. It's one of those
> « anything can be expressed as anything else » kind of exercise.
>
> When trying to be practical, though, flat state machines are usually
> ineffectual, and nearly everybody who says just « state machine » means the
> flat
> thing. Some came up with something named hierarchical state machine, which is
> a
> much more useful model for nesting stuff, because it uses a stack. But to
> understand PureData, the whole GOTO concept at heart of state machines is not
> very useful. You still need to distinguish how many messages a [t] or a
> [until]
> has sent, but the GOTO model isn't so useful for that, especially when
> number of states are variable or unlimited, but also any time that a metaphor
> of
> storage can be used (e.g. [until] uses an internal int variable to count
> iterations when it needs to). But overall, it's better to put a lot more
> emphasis on stack metaphors when teaching Pd, because a lot of Pd is to send
> messages (function call) and to come back (return) from the processing of a
> message.
>
>> In that respect, soundfiler is not made to run well in a switched
>> environnement such as pd. Just like a network interface that would
>> saturate a link, ignoring time-slots, collision-detection and such.
>
> The big resemblance between the two is really just the realtime aspect. Apart
> from that, Pd doesn't generally ever discards any data, whereas a network
> switch has to, and Pd does its execution mainly by depth-first searches,
> whereas
> network switches hardly ever have to do any recursion.
>
> ______________________________________________________________________
> | Mathieu BOUCHARD ----- téléphone : +1.514.383.3801 ----- Montréal, QC
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