in this patch (B09) only the first 44103 samples of the file are loaded. Try using the "-resize" flag after the "open" message to the soundfiler (e.g.: [open -resize ../sound/voice.wav table18( ).
But: you will also have to increase the chunk size.
[+~ 1] < not sure what this does :p but dont matter much... offsets array index by 1
This 1 sample offset as well as the +3 samples at the end of the array (44100+3) are the guard points for the cubic interpolation tabread4~ uses.