Sound (audio) bytes will be returned to your browser as MIME type 'audio/basic'. This is the type of 'u-law' audio files, that usually have the filename suffix of .au or .snd. You may have to configure your browser to handle this type (and no, I don't know how to do that for the specific browser that you have...)
Both a single-line text input form
and a multi-line text input form are available.
They offer more functionality, like eg. viewing the phonemes
that get generated for a phrase, or selection of a dictionary.
As
result of some experiments with MIME multipart messages,
an experimental addition now allows you to
specify that you want to receive both phonemes and speech.
However, you likely have to fiddle a bit with your browser to make it grok multipart messages.
Background information about rsynth and about this gateway (What? Who? Why? Where? How? - all you ever wanted to know about Say...) is available.
Say... has been nominated in the `Most Technical Merit' category of the Best of the Web '94 Contest.