[jmsl] start playback, but not at the "start"

[jmsl at music.columbia.edu]

Hello J

Welcome to the JMSL user base.  I am glad to hear you are diving into 
JMSL and coming up with interesting scheduling questions so soon!

You are right; a good way to schedule a bunch of MusicShapes in various 
sequences is to put them in a SequentialCollection and provide a 
Behavior for it. Behavior returns an index but there is no reasons why 
it could not look up a MusicShape by name for example, find a match and 
then return the index of the matching MusicShape.  But maybe I am 
getting ahead of myself, by what means do you want to choose which one 
executes?

A MusicShape cannot be launched in the middle of its elements.  You 
could build a nice auxiliary class that did so however, by creating a 
MusicShape on the fly. (ie, if you want it to start 5 seconds into the 
MusicShape, skip the first accumulated 5 seconds' worth of elements and 
copy the rest into the MusicShape you actually launch. Make up for the 
portion of the duration between elements with a startDelay)

Does this help?

TimePoint is used by JMSL's transcriber.  It's not relevant to this 
discussion

Thanks,
Nick Didkovsky

jmsl at music.columbia.edu wrote:
> hmmm... Okay, so I figured out that I could make a Behavior-based 
> object that chooses the desired MusicShape by index. But of course 
> this implies that I know the index of the MusicShape.
>
> I'm wondering about TimePoint, but it seems pretty "thin", in terms of 
> methods... By the description it sounds as though it should have some 
> method like getIndexes(), and maybe getMusicShape(), but it only 
> offers toString(). So I'm really not sure how I'd make use of it.
>
> I'll keep poking away at the docs, but if anybody can help get me out 
> of the woods - just by pointing me in the right direction - I'd 
> appreciate it.
>
> cheers,
>
> J.
>
>
> On 14-Jul-08, at 9:06 AM, jmsl at music.columbia.edu wrote:
>
>> Hi All,
>>
>> I'm new to JMSL and just wondering how to start playback from a given 
>> point in time.
>> I have a Player with n MusicShapes, but I'd like to be able to start 
>> playback from an arbitrary point along those n sequences - is this 
>> possible? Can I, for example, start from an arbitrary point using a 
>> timestamp? Just like a basic play cursor in a sequencer.
>>
>> thanks,
>>
>> J.
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