[PD] readanysf~ error

[Derek Holzer]

Hello August, list....

I'm helping a student's installation, and we have created a patch  
which uses 24 instances of readanysf~ to read from 24 different  
soundfiles between 15min and one hour in length. All sound files are  
mono, 16 bit, 44.1KHz WAV_PCM format.

The problem is that, after a length of time, the readanysf~ objects  
output noise rather than the soundfile. It is not the result of any  
single soundfile, and many or all of the readanysf~ objects can be  
affected by this simultaneously.

I have attached the abstraction in question. The object is  
instantiated as [readanysf~ 1], in other words the block size and and  
buffer size are defaults.

Sample terminal output is as follows while the patch is running:

Created new readanysf~ with 1 channels and internal buffer of 24 * 64 = 1536
Current file is either invalid or an unsupported codec.
Current file is either invalid or an unsupported codec.
Current file is either invalid or an unsupported codec.
Current file is either invalid or an unsupported codec.
Current file is either invalid or an unsupported codec.
Current file is either invalid or an unsupported codec.
Current file is either invalid or an unsupported codec.

Opening each soundfile individually with readanysf~ and sending "play"  
and "pause" messages reports no errors whatsoever, however.

I have sndfile-info data for all of the soundfiles. The only  
irregularity I see in this is one file which reports:

   Unknown chunk marker at position 6087587. Resynching.

Besides that, most of the files report something like this:

File : F_DOK6.wav
Length : 146725772
RIFF : 146725764
WAVE
bext : 602
fmt  : 16
   Format        : 0x1 => WAVE_FORMAT_PCM
   Channels      : 1
   Sample Rate   : 44100
   Block Align   : 2
   Bit Width     : 16
   Bytes/sec     : 88200
*** minf : 16 (unknown marker)
*** elm1 : 7506 (unknown marker)
data : 140114520
*** regn : 92 (unknown marker)
*** umid : 24 (unknown marker)
*** DGDA : 6602919 (unknown marker)
End

----------------------------------------
Sample Rate : 44100
Frames      : 70057260
Channels    : 1
Format      : 0x00010002
Sections    : 1
Seekable    : TRUE
Duration    : 00:26:28.600
Signal Max  : 11627 (-9.00 dB)

Someone suggested the noisy output may be the result of a buffer  
problem, but I am not sure who I could verify or correct this.

I checked with "top" while the noise was happening and saw no evidence  
that Pd was using any more memory than usual, and the CPU meter  
reported 30%.

Hardware is an Intel Mac Mini, software is Pd-Extended 0.41.4.

Any suggestions or other diagnostics I could run are appreciated.

Best!
Derek
-- 
::: derek holzer ::: http://macumbista.net :::
---Oblique Strategy # 136:
"Remove specifics and convert to ambiguities"

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