[asterisk-users] app_echo.c

hi, all
I have test echo application for just fun.
I can'nt understand why this is used below in .c file,

format = ast_best_codec(chan->nativeformats);
ast_set_write_format(chan, format);
ast_set_read_format(chan, format);

without this this application work fine.
then why this is used.

any suggestion??

Bhrugu mehta

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