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RE: VoiceXML 2.0, Last Call: <audio> playback controls.

From: Scott McGlashan <scott.mcglashan@pipebeach.com>
Date: Tue, 28 May 2002 15:33:33 +0200
Message-ID: <2764A29BE430E64A92EB56561587D2E7107D59@se01ms02.i.pipebeach.com>
To: "Bogdan Blaszczak" <Bogdan.Blaszczak@intervoice-brite.com>, <www-voice@w3.org>
Thank you for your comments on LCWD. Your issues have been registered
and we will get back to you over the next few weeks with our response.

thanks again 

Scott McGlashan 

Dialog team leader, VBWG

-----Original Message-----
From: Bogdan Blaszczak [mailto:Bogdan.Blaszczak@intervoice-brite.com]
Sent: Saturday, May 25, 2002 06:44
To: www-voice@w3.org
Subject: VoiceXML 2.0, Last Call: <audio> playback controls.

VoiceXML 2.0, Last Call: <audio> playback controls.
by Bogdan.Blaszczak@intervoice-brite.com

Additional control over a start position, speed and volume of audio
would be a useful feature in some applications.

Section 6.3.1 has an example of a volume control provided as a
platform-specific property. However, it also correctly states that
"platform-specific properties introduce incompatibilities".

A standard solution for a playback control can be based on SSML ideas.
For example, VoiceXML may allow additional attributes to be used in the
<audio> tag. Such attributes can be modeled on selected attributes of
<prosody> (see also section 2.2.4 of the SSML spec). The attributes
would be
optional and possibly ignored by some platforms.

The following additional <audio> attributes would be useful:

- speed:     the playback speed in percent of the normal speed (e.g.:
100%, 200%) or values 'slow', 'normal', 'fast'.

- volume:    the playback volume in percent of the normal volume (e.g.:
100%, 200%) or values 'soft', 'normal', 'loud'.

- position:  the playback start position in seconds from the beginning
of the
audio recording (e,g.: 1s, 100s).

Any comments would be greatly appreciated.

Bogdan Blaszczak
Received on Tuesday, 28 May 2002 09:30:46 UTC

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