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Re: [css3-speech] voice-pitch

From: Daniel Weck <daniel.weck@gmail.com>
Date: Wed, 6 Jul 2011 17:13:10 +0100
Message-Id: <B83BCB61-0764-4CCA-A055-12EB450D0974@gmail.com>
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 GMT

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