- (see below) take effect. Otherwise, the compiled-in default
- filters mp3dec, oggdec and aacdec are activated for mp3, ogg,
- aac streams respectively.
+ (see below) take effect. Otherwise, the compiled-in defaults
+ apply. These defaults depend on the receiver being used as
+ described below.
+
+ For http streams, only a single filter per audio format,
+ the decoder for that format, is activated. On the other hand,
+ since udp and dccp streams are sent fec-encoded by para_server,
+ the client side must feed the output of the receiver into
+ the fecdec filter first. Therefore the default for udp and
+ dccp streams is to activate the fecdec filter, followed by
+ the appropriate decoder.
+
+ You must give this option if you want to use any other filter,
+ for example the amp or the compress filter.
+