Hi John,

Yes, I agree it's a BUG, and haven't denied that; I simply wanted to
point out on the side that I think the CSD as written is a bit
problematic, for the author's benefit.

Anyways, I took a look at Csound 4's musmon.c and insert.c.  From a
quick glance comparing sensevents in both csound5's Engine/musmon.c
and musmon.c in Csound, I'm seeing this as a possible lead:

[CSOUND 5 CODE in SENSEVENTS]
      if (O->Beatmode) {
        tval = csound->curBeat + (0.51 * csound->curBeat_inc);
        if (csound->frstoff->offbet <= tval) beatexpire(csound, tval);
      }
      else {
        tval = csound->curTime + (0.51 * csound->curTime_inc);
        if (csound->frstoff->offtim <= tval) timexpire(csound, tval);
      }

[CSOUND 4 CODE in SENSEVENTS]
if (O.Beatmode)
            beatexpire(curbt + hfkprd); /* rm any expired instrs */
          else
            timexpire(curp2 + hfkprd);

[CSOUND 4 CODE in BEATEXPIRE]
  if ((ip = frstoff) != NULL && ip->offbet <= beat) {


I think hfkprd is assigned .5 * ekr, while the check in Csound5 uses
0.51.  If this is the bug, I assume it was done for a reason, but
don't know why.

Note: This may not be it, just what I found in quick glance.

Thanks!
steven



On Sun, Oct 5, 2008 at 11:54 PM, jpff <jpff@codemist.co.uk> wrote:
> The glitch is a BUG introduced in the rewrite on csound4 to csound5.
> It is clear that there is at least one case when a note stops 1
> k-cycle too early or a note starts 1 cycle too late.  I have chasing
> it back but progress is slow (and it is a week into term)
> ==John ffitch
>
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