Also a beginner - and no nothing of Bela
But if you are looking for Pd examples to control speed / pitch of a loaded sample, check out some of the example patches included with Pd if you haven't already:
Specifically the ones in doc/3.audio.examples/
B07 through B12 should provide a good starting point.

Thanks you!

I just installed from source, so maybe, just maybe, next time I'll venture out and submit my own Pull Request.

Hello all,
Running Pd version 0.54.1 (Vanilla) on Mac
To repro, simply run doc/3.audio.examples/D05.envelope.pitch.pd, and click either of the attack messages. You'll notice the sound fades out immediately when it should sustain.

The problem is the fact that D05 has two instances of the D02.adsr abstraction, but the instances use the same remote message without the unique $0 identifier.
So to fix, just change "s line" to "s line-$0" and similar for receive objects.

I found an unresolved post from 13 years ago that references the same issue:
https://forum.pdpatchrepo.info/topic/5058/problem-with-d05-envelope-pitch-pd
But rather than try to necro that post, figure I'll make a new post. Is this just me? Am I missing something? Should we update the doc examples?

Cheers,
-Michael

PS: The doc/examples are super helpful, and the only reason I know about the $0 thing at all is from doc/2.control.examples/13.locality.pd