Dear Victor,

Thanks for your fast response. I guess I'll have to download the sources from Guitorius, and use the development version. With my skills, this seems like a free-weekend project. One thing wasn't clear, though. Was the bug already fixed, or was it a simple correction that you just made? I ask this because I ignore if it is relevant that I report bugs from v5.02 (the stable Debian repos must be months behind, at the least).

If sending bugs from this version is relevant, I also found a bug in ATSsinnoi: the  ipartialincr parameter gives a segmentation fault if set to anything but 1. If it is useful, I'll send a simple .orc and .sco that reproduce the bug.

Best,

Ernesto

---

De: Victor Lazzarini <Victor.Lazzarini@nuim.ie>
Para: csound@lists.bath.ac.uk
Enviado: martes, 28 de junio, 2011 6:41:58
Asunto: Re: [Csnd] Probable bug in ATSadd

Thanks, this is fixed now in GIT.

Victor

On 28 Jun 2011, at 04:31, Ernesto Illescas wrote:

Dear All,

First of all thanks for the great source of information this list is. I
hope soon I can contribute with solutions...

Anyway to the issue: I believe I've found a bug with the ATSadd opcode.
I'm working on Debian Squeeze (adm64) with "Csound version 5.12 (double
samples) Aug  5 2010" (quoting from my terminal). I ignore if this
happens on other architectures-builds.

What I've been able to establish is that if I can reduce the number of
partials for the re-synthesis (p4 in my score), but once I got to a
value, I can't increment it without getting an error. This is evidenced
by commeting-uncommenting the last score-statement in my .sco (the
commented statement shows no error). From what I've read on the internet
about the error, it seems that once I reduce the number of partials I
use, memory is freed, and I can't access it again; but Iḿ not sure.

Here is the error message, the .orc, the and .sco. I'm also attaching
my .ats analysis file.

The error:

PortAudio real-time audio module for Csound
PortMIDI real time MIDI plugin for Csound
virtual_keyboard real time MIDI plugin for Csound
0dBFS level = 32768.0
Csound version 5.12 (double samples) Aug  5 2010
libsndfile-1.0.21
Reading options from $CSOUNDRC: /home/ernesto/csound/.csoundrc
orchname:  temp.orc
scorename: temp.sco
rtaudio: ALSA module enabled
RAWWAVE_PATH: /usr/share/stk/rawwaves/
rtmidi: PortMIDI module enabled
orch compiler:
Macro definition for AtsNumPartials
Macro definition for AtsDur
    instr    1   
Elapsed time at end of orchestra compile: real: 0.001s, CPU: 0.000s
sorting score ...
    ... done
Elapsed time at end of score sort: real: 0.001s, CPU: 0.000s
Csound version 5.12 (double samples) Aug  5 2010
0dBFS level = 1.0
orch now loaded
audio buffered in 256 sample-frame blocks
writing 512-byte blks of shorts
to /home/ernesto/csound/soundfiles/test.wav (WAV)
SECTION 1:
ftable 1:
new alloc for instr 1:
file original.ats (791640 bytes) loaded into memory
instr 1:  iAtsNumPartials = 77.000
B  0.000 ..  2.482 T  2.482 TT  2.482 M:  0.85321
instr 1:  iAtsNumPartials = 77.000
B  2.482 ..  4.964 T  4.964 TT  4.964 M:  0.85063
instr 1:  iAtsNumPartials = 77.000
B  4.964 ..  7.446 T  7.446 TT  7.446 M:123786381.31152
*** glibc detected *** csound: malloc(): memory corruption:
0x00000000007a61c0 ***


The orchestra:

sr        = 44100
kr        = 4410
ksmps    = 10
nchnls    = 1
0dbfs    = 1.0

; Macro definitions

#define AtsNumPartials #3#
#define AtsDur #7#

    instr 1
SAtsfile = "original.ats"
; Extract data from header of ATS anlysis.
iAtsNumPartials    ATSinfo SAtsfile, $AtsNumPartials
iAtsDur            ATSinfo SAtsfile, $AtsDur
print iAtsNumPartials

iDur            = p3
if p4 > 0 then
    iNumPartials    = p4
else
    iNumPartials    = iAtsNumPartials
endif

kTimePointer    line 0, iDur, iAtsDur - .01
aSig    ATSadd kTimePointer, 1, SAtsfile, 1, iNumPartials, 0
    out    aSig
    endin


The score:

f1 0 16384 10 1                ; a sine wave

i1 0 2.482 0
i1 + 2.482 50
i1 + 2.482 60


I hope this helps better the code, apart from helping me ;~).

Best,

Ernesto

<original.ats>

Dr Victor Lazzarini

Senior Lecturer

Dept. of Music

NUI Maynooth Ireland

tel.: +353 1 708 3545

Victor dot Lazzarini AT nuim dot ie