kstatus is like a counter in mdelay.csd

kstatus + 1 = 1
kstatus + 1 = 2
kstatus + 1 = 3
...
kstatus + 1 = 128    writes in the internal buffer
ksattus + 1 = 129
...
kstatus + 1 = 144    writes in the internal buffer
kstatus + 1 = 145
...

and the output of mdelay (after the delay) is

note off     (turn off the current note on, I don't think that it is what you want)
note on
note off
note on
note off
note on
note off
note on

note off     when you release the key (again, I don't think that it is what you want).

My previous msg contains the explanation and a variation of the example.

> Also, to produce the real MIDI data does mdelay sum the status byte and the
> channel? Normally the channel is considered part of the status byte, so it
> is not unambiguous how that is handled here.

status and channel are separate for convenience (see also `midiin' and
`midiout' opcodes), the (real) bytes of the sent midi message are

  byte1 = status | chan
  byte2 = data1
  byte3 = data2

tito

On Sat, Feb 25, 2012 at 10:42:32AM -0800, Dennis Raddle wrote:
> Yes, I understand that basics of MIDI usage in Csound -- at least I've made
> a few instruments that are triggered by MIDI -- but, there is something
> invisible going on in this example. "kstatus" is described as the status
> byte but nothing ever sets it to a MIDI status byte! It's either 0, or
> incremented on every k-pass. I don't get it. Does one of the other opcodes
> "invisibily" set kstatus? I can't find anything about that in the
> documentation.
> 
> Also, to produce the real MIDI data does mdelay sum the status byte and the
> channel? Normally the channel is considered part of the status byte, so it
> is not unambiguous how that is handled here.
> 
> Dennis
> 
> On Sat, Feb 25, 2012 at 9:36 AM, Giorgio Zucco <giorgiobrx@libero.it> wrote:
> 
> > Hi,quote from the manual :
> >
> > "....Each time that kstatus is other than zero, mdelay outputs a MIDI
> > message to the MIDI out port after kdelay seconds..."
> >
> > then...
> >
> > kstatus init 0
> > kstatus = kstatus + 1
> >
> > Note that this opcode is not working with an internal csound instrument,
> > but
> > trigger an external instrument via MIDI "-Q" (I tried with NI Kontakt), to
> > explore the topic I suggest you read "MIDI Instruments Designs for
> > real-time
> > performance" of G . Maldonado on Csound Book,bye
> >
> > --
> > View this message in context:
> > http://csound.1045644.n5.nabble.com/mdelay-tp5515337p5515514.html
> > Sent from the Csound - General mailing list archive at Nabble.com.
> >
> >
> > 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"
> >
> >
> 
> Send bugs reports to the Sourceforge bug tracker
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>