[CM] midi-received functions

[Forrest Curo]

function mychord (data)
  with channel = second(data),
       keynum = third(data),
       velocity = fourth(data)
  send("mp:midi", key: key, vel: vel, chan: chan)
  send("mp:midi", key: key + pick(3,4), vel: vel, chan: chan)
  send("mp:midi", key: key + 7, vel: vel, chan: chan)
end
-------------
response: 'mychord'
-------------
send("mp:receive", mm:on, mychord)
------------------
response: '#t'
-------------------
[play note]
------------------
response:
>>> Error: :vel not a valid keyword argument in
(:key key :vel vel :chan chan)
------------------------------------

That is, it doesn't work in that example because it needs a variable
'velocity' rather than 'vel'. (?)

If I fix that and likewise put the variable 'channel' in place of 'chan',
'keynum' rather than 'key' -- *then it works*.

Since I'm working with an ubuntu binary of 3.8.0 I might not be using the
latest examples available(?) [I couldn't install a more recent Grace
because my system seems to be allergic to cmake > cmake4.3 --
(perhaps for similar 32-bit --> 64-bit issues?)
-------------
If I get rid of the 'send's in the mp.midi lines
the error instead is:
>>> Error: vel: unbound variable
and changing everything as before yields:

>>> Error: mp:midi: unknown key: (:vel 91 :chan 0)
in (:key 59 :vel 91 :chan 0)

The 'send' and the 'mp:midi' ought to be equivalent; but it's working with
the 'send' version, while I don't see why:
  mp:midi(key: keynum, vel: velocity, chan: channel)
is not.
(?)




On Fri, Feb 19, 2016 at 10:43 AM, Taube, Heinrich K <taube at illinois.edu>
wrote:

> its not clear to me what the issue is. does it not work.
> BTW no need to use send() and just call the function directly so
>
> > send("mp:midi", key: key, vel: vel, chan: chan)
>
> can be written
>
> mp:midi(key: key, vel: vel, chan: chan)
>
> i thought I got rid of all that in the documentation and help files.
>
>
> > On Feb 19, 2016, at 10:04 AM, Forrest Curo <treegestalt at gmail.com>
> wrote:
> >
> > The section is "Input Hooks" (speaking of errors... but still not the
> first title I'd look for this under.)
> >
> > On Fri, Feb 19, 2016 at 7:59 AM, Forrest Curo <treegestalt at gmail.com>
> wrote:
> > Okay, among 'examples' there is a section titled 'Output Hooks' (not, to
> my mind, the most obvious titles to look for)
> > and the examples have errors:
> > ie
> >
> > ; An opcode receiver that plays a major or minor chord whenever a
> > ; Note On arrives
> >
> > function mychord (data)
> >   with channel = second(data),
> >        keynum = third(data),
> >        velocity = fourth(data)
> >   send("mp:midi", key: key, vel: vel, chan: chan)
> >   send("mp:midi", key: key + pick(3,4), vel: vel, chan: chan)
> >   send("mp:midi", key: key + 7, vel: vel, chan: chan)
> > end
> >
> > ;; assign receiver for the mm:on opcode (Note Ons)
> >
> > send("mp:receive", mm:on, mychord)
> >
> > ;; when you are done clear it...
> >
> > send("mp:receive", mm:on, #f)
> > -----------------------------------------------------------
> >
> > It can be fixed, however. This works:
> > -------------------------------------------------------------
> > function mychord (data)
> >   with channel = second(data),
> >        keynum = third(data),
> >        velocity = fourth(data)
> >   send("mp:midi", key: keynum, amp: velocity, chan: channel)
> >   send("mp:midi", key: keynum + pick(3,4), amp: velocity, chan: channel)
> >   send("mp:midi", key: keynum + 7, amp: velocity, chan: channel)
> > end
> >
> > ;; assign receiver for the mm:on opcode (Note Ons)
> >
> > send("mp:receive", mm:on, mychord)
> >
> >
> > On Thu, Feb 18, 2016 at 9:10 PM, Forrest Curo <treegestalt at gmail.com>
> wrote:
> > I see a tutorial on sending midi out
> >
> > and ways to declare a function to be receiving midi in with specific
> opcodes
> >
> > but I'm not at all clear on how such a function should be written to
> extract the data when a midi message comes in.
> >
> > Examples anywhere?
> >
> >
> >
> >
> > _______________________________________________
> > Cmdist mailing list
> > Cmdist at ccrma.stanford.edu
> > https://cm-mail.stanford.edu/mailman/listinfo/cmdist
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://cm-mail.stanford.edu/mailman/private/cmdist/attachments/20160219/e4b3fbe4/attachment.html>