[Csnd] another syntax question

Dear community,
I had a look an Ian McCurdys “Drunk-Walk” (http://iainmccurdy.org/CsoundRealtimeExamples/RealtimeScoreGeneration/DrunkWalk.csd).
Unfortunately there’s one thing in the syntax which I don’t understand:

schedkwhen ktrigger, 0, 0, p1+1, 0, 0.01

(in instr 1)

Does this code mean (when written in instr 1) call instrument 2?

Thanks for Your help,
Stefan

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yes, you can check with
  print p1
or
  print p1+1

best -
  j

Thanks!
That’s clear now!