This document lists the (audio related) CSS properties Rhapsode supports.
    To hear the effect of these properties, listen to it in Rhapsode.
  
    - voice-volume (initial 
medium) 
    - x-soft
 
    - soft
 
    - medium
 
    - loud
 
    - x-loud
 
    - keyword _db, e.g. medium +2db
 
    - silent
 
    - speak (initial 
always) 
    - Can be 
always or never to determine whether the text is read. 
    - speak-as (initial 
normal) 
    - normal
 
    - spell-out
 
    - digits
 
    - literal-punctuation, can be suffixed to 
normal, spell-out, or digits. 
    - no-punctuation, as per literal-punctuation.
 
    - pause-before (initial 
none, non-inherited) 
    - _ms, e.g. 500ms
 
    - _s, e.g. 1s
 
    - none
 
    - x-weak
 
    - weak
 
    - medium
 
    - strong
 
    - x-strong
 
    - pause-after (initial 
none, non-inherited) 
    - _ms, e.g. 500ms
 
    - _s, e.g. 1s
 
    
    - x-weak
 
    - weak
 
    - medium
 
    - strong
 
    - x-strong
 
    - pause (shorthand)
 
    - pause-before pause-after
 
    - Single token, both 
pause-before & pause-after are set to the same value. 
    - rest-before (initial 
none, non-inherited) 
    - _ms, e.g. 500ms
 
    - _s, e.g. 1s
 
    - none
 
    - x-weak
 
    - weak
 
    - medium
 
    - strong
 
    - x-strong
 
    - rest-after (initial 
none, non-inherited) 
    - _ms, e.g. 500ms
 
    - _s, e.g. 1s
 
    - none
 
    - x-weak
 
    - weak
 
    - medium
 
    - strong
 
    - x-strong
 
    - rest (shorthand)
 
    - rest-before rest-after
 
    - Single token, both 
rest-before & rest-after are set to the same value. 
    - cue-before (initial 
none, non-inherited) 
    - none
 
    - url()
 
    - url() _db, e.g. url(link.wav) -1db
 
    - cue-after (initial 
none, non-inherited) 
    - none
 
    - url()
 
    - url() _db, e.g. url(link.wav) -1db
 
    - cue (shorthand)
 
    - cue-before cue-after
 
    - Single token, both 
cue-before & cue-after are set to the same value 
    - voice-family
 
    - preserve
 
    - by name, e.g. whisper
 
    - By gender, i.e. 
male, female, or neutral. 
    - By gender and age, e.g. old male
 
    - By gender and variant number, e.g. female 3.
 
    - voice-rate (initial 
normal) 
    - normal
 
    - x-slow
 
    - slow
 
    - medium
 
    - fast
 
    - x-fast
 
    - keyword _%, e.g. fast 50%
 
    - voice-pitch (initial 
medium) 
    - x-low
 
    - low
 
    - medium
 
    - high
 
    - x-high
 
    - keyword _hz, e.g. low +500hz
 
    - keyword _khz, e.g. low +10khz
 
    - keyword _st, e.g. low +2st. In semitones.
 
    - keyword _%, e.g. low 50%
 
    - _hz, e.g. +500hz. Difference from current value.
 
    - _khz, e.g. +10khz. Difference from current value.
 
    - _hz absolute or absolute _hz, e.g. 500hz absolute
 
    - _khz absolute or absolute _hz, e.g. 10khz absolute
 
    - voice-range (initial 
medium) 
    - x-low
 
    - low
 
    - medium
 
    - high
 
    - x-high
 
    - keyword _hz, e.g. low +500hz
 
    - keyword _khz, e.g. low +10khz
 
    - keyword _st, e.g. low +2st. In semitones.
 
    - keyword _%, e.g. low 50%
 
    - _hz, e.g. +500hz. Difference from current value.
 
    - _khz, e.g. +10khz. Difference from current value.
 
    - _hz absolute or absolute _hz, e.g. 500hz absolute
 
    - _khz absolute or absolute _hz, e.g. 10khz absolute
 
    - voice-stress (initial 
normal) 
    - normal
 
    - strong
 
    - medium
 
    - none
 
    - reduced