- From: Daniel Weck <daniel.weck@gmail.com>
- Date: Wed, 6 Jul 2011 17:13:10 +0100
- To: "www-style@w3.org style" <www-style@w3.org>, fantasai <fantasai.lists@inkedblade.net>
This is a good suggestion. Let me know if the (updated) prose that specifies how to handle positive versus negative <numbers> in the <frequency> definition is good. Daniel On 30 Jun 2011, at 03:13, fantasai wrote: > http://dev.w3.org/csswg/css3-speech/#voice-pitch > > # voice-pitch: <frequency> | <percentage> | <relative-value> && > relative > ... > # <frequency> > # Specifies the average pitch of the speaking voice using an > # absolute value in frequency units (Hertz and kiloHertz, e.g. > # "100Hz", "+2kHz") as per the syntax of frequency values > # defined in [CSS3VAL]. Only positive values are allowed. > ... > # <relative-value> > # Specifies a relative change (decrement or increment) to the > # inherited value. The syntax of allowed values is a <number>, > # followed immediately by either of "Hz" (for Hertz) or "kHz" > # (for kiloHertz) or "st" (for semitones). > # relative > # This keyword specifies that the provided value is expressed > # relatively to another base value. This is in order to > # disambiguate from absolute <frequency> values. > > I think, given that semitones can only be relative, that it would > make more sense to define this as either > | voice-pitch: <frequency> && relative? | <percentage> | <semitone> > or > | voice-pitch: <frequency> && absolute? | <percentage> | <semitone> > depending on whether > voice-family: 120Hz; > voice-family: 5Hz relative; > or > voice-family: 120Hz absolute; > voice-family: 5Hz; > seems the more reasonable pair.
Received on Wednesday, 6 July 2011 16:13:39 UTC