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Re: [css3-speech] voice-pitch

From: Tab Atkins Jr. <jackalmage@gmail.com>
Date: Wed, 13 Jul 2011 09:47:35 -0700
Message-ID: <CAAWBYDDudJ5myS7PyRQTuZOFsuTyNOpniWaMpG-Ns=cPubVi-w@mail.gmail.com>
To: Daniel Weck <daniel.weck@gmail.com>
Cc: www style <www-style@w3.org>, fantasai <fantasai.lists@inkedblade.net>
On Wed, Jul 13, 2011 at 9:43 AM, Daniel Weck <daniel.weck@gmail.com> wrote:
> On 13 Jul 2011, at 17:33, Daniel Weck wrote:
>> Are we allowed to redefine the use "+/-NUMBER%" in CSS-Speech, to actually mean "add the specified fraction of the inherited value, to the inherited value" ? Based on our previous discussions I thought that this was not allowed.
>
> In case we are *not* allowed to do this, I propose to drop percentages for both the 'pitch' and 'pitch-range' properties. Otherwise CSS-Speech would define a syntax very similar to SSML, but with different semantics (situation which would be very confusing for authors). This would mean that only Hz (absolute or relative) and st (semitones, relative by nature) would be allowed. This seems like a good compromise, as they are the most useful methods for altering the pitch settings (note that "+50%, multiply the pitch-range by 0.5" doesn't exist in SSML, it is actually "add 50% of the pitch-range to the pitch-range").

We're not allowed to change what "+5" means, because that's handled at
the parsing layer, before we know what property it's attached to.

~TJ
Received on Wednesday, 13 July 2011 16:48:21 GMT

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