Luigi Auriemma

Within it are the type of file 0000****.dat 154800 mono,delta 32000 1 16 more than 5000 pieces

and one file with the extension *. wav , how to reduce the size of fsb ?

I guess you mean extracting the files (without using the -a option), edit them for making them at lower quality and then rebuilding the fsb archive.
I see you have all delta/mp3 files so the job should be very easy:

• fsbext -s c:\build.dat -d c:\output_folder input_file.fsb
  as you can see I have not used the -a option because luckily the mp3 files are headerless in any case (so with and without -a is the same) and then because you have a wav file that, as said before, must be headerless if you want to use fsbext to rebuild the archive (the alternative is using fmod designer)
• now decode all these mp3 files and then re-encode them at lower quality with lame
• fsbext -s c:\build.dat -d c:\output_folder -r output_file.fsb

while the alternative is:

• fsbext -a -d c:\output_folder input_file.fsb
• now decode all these mp3 files and then re-encode them at lower quality with lame
• rebuild with fmod designer

hope it's clear and helps

I tried to encode with poor quality, but then all the dialogues, or do not go on line, or even break off!

have you conserved the same frequency and number of channels? only a test
with "lame" you can make the compression better although taking the same freq/chans... only an idea

I need to reduce the file by 30%, with Lame obtain a maximum of 8%! :(

have you tried to repack the fsb with fmod designer?
and if it failed have you tried to use the fsbext -r mode?

fmod designer sends a mistake, but fsbext after being converted with the lame, did not reduced the size!

thanks :)