[maxmsp] @attributes in msp

Hi All,

I was poking around in the jitter help patches and came across
something interesting in the help patch for jit.catch~.  In the [p
synth+delay] subpatch there seems to be a rebellious MSP object using
the oh so nice jitter attributes feature:
[adsr~ 1. 5. 0.8 525. @maxsustain 50]

I've tried a couple other MSP objects to see if they'll accept
arguments like adsr~ seems to, but I haven't had any luck.  Is adsr~
the only lucky recipient of this skill, or are there other max objects
that can help me prune a few loadbangs from my patches?

Maybe I missed something obvious and this isn't at all what it seems?
Wouldn't be the first time!

What's going on?

Thanks!

Erik

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