hi mod_cepstral wasn't working with umlauts, neither did swift on cli. cepstral support told me to use "-e utf-8" on cli to get it working. Indeed it worked. The default is LATIN1/iso8859-1 encoding and can't be changed in a global config. mod_cepstral did not provide the ability to define the encoding of the text. I wrote a patch for mod_cepstral and opened a jira bug: http://jira.freeswitch.org/browse/FS-3001 - Thomas