| Hello,
Please excuse me writing this long email.
I have a question about a new feature in csound5.11, which I thought
is rather appropriate for the devel-list.
It says in the release notes:
PMAX, the number of arguments to a score event has been reduced
by 2, and an overflow system introduced so GENs can have
arbitrary numbers of arguments
After some testing today (with GEN7 and GEN-7) I found that there
still seems to be a limit, or perhaps a bug:
The limit seems to be different depending if one uses a negative GEN-
number (bypasses rescaling) or not. Below are some examples (posts to
the Csound5GUI-console).
I am not posting the scores (because of the long f-statements), the
orchestra is at the bottom of the mail.
I am using "Csound version 5.11 (double samples) Sep 24 2009" on a
MBPro17", MacOS10.6.1.
For negative GEN-numbers the max number of p-fields seems to be 2010:
1. 2010 p-fields (4+1003 value-pairs) with GEN-7
--------------------------------------------
ftable 500: 4097 points, scalemax 1.568
new alloc for instr 1:
B 0.000 .. 1.000 T 1.000 TT 1.000 M: -2.09
Score finished in csoundPerformKsmps().
inactive allocs returned to freespace
end of score. overall amps: -2.09
overall samples out of range: 0
0 errors in performance
---> works fine.
2. 2012 p-fields (4+1004 value-pairs) with GEN-7
------------------------------------------
ftable 500: gen call has negative segment size:
f500 0.00 4097.00 -7.00 -1.56 ...
new alloc for instr 1:
INIT ERROR in instr 1: Invalid ftable no. 500.000000
a2 poscil.kk iamp idurosc iaenv 0
B 0.000 - note deleted. i1 had 1 init errors
Score finished in csoundPerformKsmps().
inactive allocs returned to freespace
end of score. overall amps: 0
overall samples out of range: 0
1 errors in performance
---> doesn't work because of 'negative segment size' (-> the f-
statement is exactly the same as above just more p-fields)
3. 4004 p-fields (4+2000 value pairs) with GEN7
------------------------------------------
ftable 500: 4097 points, scalemax 1.000
new alloc for instr 1:
B 0.000 .. 1.000 T 1.000 TT 1.000 M: -6.00
Score finished in csoundPerformKsmps().
inactive allocs returned to freespace
end of score. overall amps: -6.00
overall samples out of range: 0
0 errors in performance
---> this works. Please note, however, that Csound5GUI was crashing
every now and then with these large f-statements.
Is this the expected behaviour or is there perhaps something I am not
seeing or I missed (e.g. do I need to set some environment-variables
or similar)?
Any help/suggestions would be greatly appreciated!
Many thanks,
Best,
Marlon
PS: If it helps I could provide the scores as a textfile.
Here is the orchestra (simple, for testing-purposes ...the tables
above are used for iaenv):
sr = 44100
kr = 44100
ksmps = 1
nchnls = 1
0dbfs = 8388607 ; 24 bits
instr 1
idur = p3
idurosc = 1/idur
iamp = (p4 > 0.0 ? (p4*0.001*0dbfs) : (ampdbfs (p4)))
ifq = p5
iaenv = p6
iaudiofun = 1
a2 poscil iamp, idurosc, iaenv
a1 poscil a2, ifq, iaudiofun
out a1
endin
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