[cdp] distort-repeat fails with 24bit file

[Peter P.]

Dear list, Richard,

thanks for looking into this problem, this is appreciated by me and our
students a lot!

More infos on the soundfile that makes
 distort repeat in.wav out.wav 2 
fail with error 
 ERROR: CANNOT ACHIEVE TASK:
 ERROR: cycle_search exceeds buffer size
follows.

The file that causes this has the following properties reported by the
linux command line program sndfile-info:
	$ sndfile-info gp.wav 
	========================================
	File : gp.wav
	Length : 35927204
	RIFF : 35927196
	WAVE
	fmt  : 16
  	  Format        : 0x1 => WAVE_FORMAT_PCM
  	  Channels      : 1
  	  Sample Rate   : 44100
  	  Block Align   : 3
  	  Bit Width     : 24
  	  Bytes/sec     : 132300
	bext : 602
	*** junk : 74 (unknown marker)
	*** 'data' chunk should be an even number of bytes in length.
	data : 35926467
	End

sfprops reports the following:
	$ sfprops gp.wav 
	Properties of /tmp/gp.wav:
	File type:  soundfile
	Format         :  Standard WAVE format
	Sample Rate    :  44100
	Channels       :  1
	Sample Frames  :  11975489
	sample type:   :  24bit (packed)
	duration       :  271.5530 secs
	no peak data in this infile

So I am not sure if this represents a file in WAVEX format as assumed.
Let me know if you want to receive a copy of this file off-list.

cheers, Peter

* Peter P. <peterparker at fastmail.com> [2020-11-22 22:35]:
> Dear Archer,
> 
> thanks for your replies. If you don't mind I'd like to keep this
> conversation on the mailing list, so that other subscribers know that
> this has been replied to and is worked on. Plus the info might be useful
> to others as well.
> Perhaps Richard would also like to join the mailing? He can
> subscribe here https://lists.mur.at/mailman/listinfo/cdp
> and we could discuss directly.
> 
> Let me add that the soundfile which caused this error was created using
> the Reaper DAW.
> 
> Peter
> 
> * Archer Endrich <archerhgm at gmail.com> [2020-11-21 13:16]:
> > Hi Peter,
> > 
> > Thanks for your report about DISTORT REPEAT.  Richard has replied about this
> > and is looking more deeply into it.  In the meantime, he has provided a
> > workaround.  Note the use of CHXFORMAT.EXE which should be in _cdprogs.
> > 
> > Archer
> > 
> > *********
> > Hi Archer,
> > 
> > this does look like a strange sfsys issue, which I will have to dig into,
> > but not because it is a 24bit file as such (other 24bit files work fine). It
> > is a mono file in WAVEX format, but with the unusual (but legal) channel
> > mask of 4 ("front centre") such as can be made using copysfx. If I use my
> > "chxformat" program to change the mask to the more orthodox 0, everything
> > runs as expected. So this would be the workaround:
> > 
> > chxformat -s0 noise24.wav
> > then run distort etc as before.
> > 
> > The more strange thing though is that somehow this is percolating through to
> > the creation of the outfile. An alternative workaround is to use the -f
> > prefix to the outfile (to make a floats outfile):
> > 
> > distort repeat noise24.wav -fn24fdist.wav 2
> > 
> > More anon...
> > 
> > Cheers,
> > Richard
> > **********
> > 
> > On 20/11/2020 20:54, Peter P. wrote:
> > > Hi list,
> > > 
> > > just discovered that distort-repeat fails with a 24bit (packed)
> > > soundfile type posting
> > > 	ERROR: INVALID DATA
> > > 	ERROR: Cannot open output file out.wav
> > > while the same call works fine with a 16bit version of the same file. I
> > > was under the impression that all(?) CDP commands are able to work with
> > > 16/24/32bit resolution files? Is this not true? Is distort-repeat
> > > an exception due to a possible bug?
> > > 
> > > Try the following call with the two attached short files:
> > >   cdp_distort repeat noise16.wav noise16-repeat 2
> > > works fine, while
> > >   cdp_distort repeat noise24.wav noise24-repeat 2
> > > throws an error.
> > > 
> > > Thanks for all pointers,
> > > Peter
> > > 
> > > _______________________________________________
> > > cdp mailing list
> > > cdp at lists.mur.at
> > > https://lists.mur.at/mailman/listinfo/cdp
> > 
> >