I'm working on a set of abstractions for my Korg nanoKONTROL, and am currently using a one-to-one [ctlin x y] to physical control mapping, which means I have 42 separate ctlin objects, all with a specific cc number and channel. So if I or someone else wants to change the midi channel, I have to do it 42 separate times. What I'd like to do is simple in a C-style language:

if channel == 1 {
  if cc == 13 {
    pass(value);
  }
}

Is there a good way to do a similarly nested if in pd? Or is there a way to limit ctlin to all cc's on a particular channel?

Thanks in advance.

I'm not sure if this is what you mean, but I think either [spigot] or [route] is what you want here. Take a look at the attached patch.

http://www.pdpatchrepo.info/hurleur/ccmapping.mmb.pd

Also yes it's possible to specify a particular midi channel with ctlin. ie [ctlin 13 1] will limit the output to cc 13 on chan 1 - as in your C code above. So you could do that multiple times instead of route/spigot, but it depends on the purpose as to which would be more complex, I reckon.

I think the spigot approach is exactly what I'm looking for. Thanks guys!