Below is the code I'm using to create an instrument (instr 1) that
invokes another instrument (instr 100) via the "event" opcode. I'm
running instr 1 as a midi instrument and invoking instr 100. I read
the midi key number via the --midi-key=5 flag. There seems to be some
problem doing arithmetic on the midi key and passing it to instr 100.
See below


; instr 1 is
; a midi instrument that takes the midi key via p5 and
; triggers one or more events via the 'event' opcode
instr 1
iampl = p4
ikey = p5
idur = i(gk__41)
iovl = i(gk__42)

; itb: time between instrument invocations
itb = idur-iovl

ktrigger init 1
if (ktrigger == 0) goto contin

;;; it is supposed to do this: several events representing a rising scale

   event "i", 100, 0*itb, idur, iampl, ikey
   event "i", 100, 1*itb, idur, iampl, ikey + 2
   event "i", 100, 2*itb, idur, iampl, ikey + 4

;; but there is something wrong with adding a number to ikey. even
;; just the following causes the problem. see below for description of
;; problem

  event "i", 100, 1*itb, idur, iampl, ikey + 2

   ktrigger = 0
contin:

endin


;; instr 100 is this
instr 100

idur=p3
iampl = p4
ikey = p5

;; the following debugging line prints the same key
;; every time instr 100 is invoked. I think the specific
;; key it prints is the value it has on the first invocation
print key

;;  lots of stuff here

endin


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im not sure if i understand what you are trying to do, but
i think you want to use "event_i" instead
(and can get rid of all the if/then stuff -- although probably replacing goto with a kgoto would 
make it work too..)


On Aug 27, 2011, at 4:25 PM, Dennis Raddle wrote:

> Below is the code I'm using to create an instrument (instr 1) that
> invokes another instrument (instr 100) via the "event" opcode. I'm
> running instr 1 as a midi instrument and invoking instr 100. I read
> the midi key number via the --midi-key=5 flag. There seems to be some
> problem doing arithmetic on the midi key and passing it to instr 100.
> See below
> 
> 
> ; instr 1 is
> ; a midi instrument that takes the midi key via p5 and
> ; triggers one or more events via the 'event' opcode
> instr 1
> iampl = p4
> ikey = p5
> idur = i(gk__41)
> iovl = i(gk__42)
> 
> ; itb: time between instrument invocations
> itb = idur-iovl
> 
> ktrigger init 1
> if (ktrigger == 0) goto contin
> 
> ;;; it is supposed to do this: several events representing a rising scale
> 
>   event "i", 100, 0*itb, idur, iampl, ikey
>   event "i", 100, 1*itb, idur, iampl, ikey + 2
>   event "i", 100, 2*itb, idur, iampl, ikey + 4
> 
> ;; but there is something wrong with adding a number to ikey. even
> ;; just the following causes the problem. see below for description of
> ;; problem
> 
>  event "i", 100, 1*itb, idur, iampl, ikey + 2
> 
>   ktrigger = 0
> contin:
> 
> endin
> 
> 
> ;; instr 100 is this
> instr 100
> 
> idur=p3
> iampl = p4
> ikey = p5
> 
> ;; the following debugging line prints the same key
> ;; every time instr 100 is invoked. I think the specific
> ;; key it prints is the value it has on the first invocation
> print key
> 
> ;;  lots of stuff here
> 
> endin
> 
> 
> Send bugs reports to the Sourceforge bug tracker
>            https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
> 



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On Sat, Aug 27, 2011 at 5:29 PM, matt ingalls  wrote:
> im not sure if i understand what you are trying to do, but
> i think you want to use "event_i" instead
> (and can get rid of all the if/then stuff -- although probably replacing goto with a kgoto would
> make it work too..)
>
>

Oh, I was wondering what the difference was between event and event_i.
Let me try this event_i.


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