--sample-offset option

Hi everyone,

in morituri, my cd ripper, I use AccurateRip to determine the correct
sample offset for a drive.

However, cdparanoia does something I don't understand for negative
offsets.

Consider this output:

$ cdparanoia --sample-offset=0
1[00:00:00.00]-1[00:00:46.15] /tmp/offset0.wav
cdparanoia III release 10.2 (September 11, 2008)

 
Ripping from sector       0 (track  1 [0:00.00])
	  to sector    3465 (track  1 [0:46.15])

outputting to /tmp/offset0.wav

 (== PROGRESS == [                              | 003465 00 ] == :^D * ==)   

Done.


[morituri-trunk] [thomas@otto trunk]$ cdparanoia --sample-offset=-1 1[00:00:00.00]-1[00:00:46.15] /tmp/offset-1.wav
cdparanoia III release 10.2 (September 11, 2008)

 
Ripping from sector       0 (track  1 [0:00.01])
	  to sector    3464 (track  1 [0:46.15])

outputting to /tmp/offset-1.wav

 (== PROGRESS == [                              | 003464 00 ] == :^D * ==)   

Done.


[morituri-trunk] [thomas@otto trunk]$ 
[morituri-trunk] [thomas@otto trunk]$ cdparanoia --sample-offset=1 1[00:00:00.00]-1[00:00:46.15] /tmp/offset1.wav
cdparanoia III release 10.2 (September 11, 2008)

 
Ripping from sector       0 (track  1 [0:00.00])
	  to sector    3465 (track  1 [0:46.15])

outputting to /tmp/offset1.wav

 (== PROGRESS == [                              | 003465 00 ] == :^D * ==)   

Done.



and the resulting file sizes:

$ ls -l /tmp/offset*wav
-rw-r--r--. 1 thomas sbox 8152076 Mar 20 19:00 /tmp/offset0.wav
-rw-r--r--. 1 thomas sbox 8149724 Mar 20 19:01 /tmp/offset-1.wav
-rw-r--r--. 1 thomas sbox 8152076 Mar 20 19:03 /tmp/offset1.wav

Why is the negative sample offset provoking cdparanoia to read one sector less ?

How can I make it read all 3466 sectors at this negative sample offset ?

Thanks
Thomas



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