CSS Audio Reference Manual

The auditory attributes define the auditory presentation of the document.

Auditory style sheets

Auditory style sheets are part of CSS, combining speech synthesis and sound effects to make it easier for visually impaired people and screen readers to access web documents.

Auditory demonstrations can be used:

• Blind people

• In cars

• In devices such as home entertainment

• Industrial and medical document systems

• Helps learning to read or users with reading difficulties

When using auditory attributes, the canvas consists of three-dimensional physical space (surround sound) and time space (a space where other sounds can be specified before, during, and after). CSS attributes also allow you to change the quality of the synthesized voice (voice type, frequency, pitch, etc.).

Example of an auditory style sheet:

h1,　h2,　h3,　h4,　h5,　h6　{
　voice-family:　male;
　stress:　20;
　richness:　90;
　cue-before:　url("pop.au");
}
p　{
　　azimuth:　center-left;
}
quotes　{
　　volume:　x-soft;
}

This will guide the speech synthesizer to speak the title with a very rich male voice (a kind of 'audio font'), and the sound sample will be played from the given URL.

The paragraph seems to come from the left front (if the sound system has spatial audio functionality), and the quotes will be softer.