No, I used the example as described by modifying the #define about which codec to use.
MP3 is working, so http connection is ok. FLAC is not working.
Moreover I downloaded the flac file from the link, it's OK.

And I must underline: the monitor shows no errors, and even shows the playback timing ...

I'm trying the example pipeline_http_select_decoder , and it's working ok with MP3, but when I try FLAC I get no sound at all...
monitor shows that everything is OK, no error messages ... last message is

I (6270) HTTP_SELECT_FLAC_EXAMPLE: [ * ] Receive music info from flac decoder, sample_rates ...