Sound; 3D Stereo Support; Spatialize Existing Material - Motorola E398 User Manual

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This chapter describes the sound environment available in the Motorola E398 handset. It

includes information on sound formats and more. Use this chapter as a reference when

creating sounds for your products.

In general, file size is limited by available memory. The available memory for downloaded

files will vary based on the media that is pre-loaded into the device. This pre-loaded

media will vary from region to region and from carrier to carrier. We recommend keeping

all media files as small as possible to ensure the consumer has the ability to download

and use a variety of files to enhance the user experience.

The acoustic system in this product utilizes two multifunction transducers. A multifunction

transducer can operate as a vibration generating device when driven at its resonance

frequency (approx 157Hz) and a loudspeaker when driven with signals above its acoustic

resonance frequency (approx 600Hz). The two functions can be used simultaneously to

provide an acoustic output with a 'bass thump'. The two transducers allow stereo

capability.

Two approaches exist to create 3D Audio files for the Motorola E398 handset. These

approaches are described below:

•

The following software is needed to render 3D audio includes:

•

The following steps are necessary to give a tradition stereo file a 3D Effect.

1. Open the sound file in the sound editor, and check for clipped audio. If any clips

Take an existing piece of music and spaitialize it

Create a 3D Soundscape from scratch (involved more work but yields the best

results)

A Multi-track Sound Editor (i.e. Adobe Audition)

An HRTF based 3D Motion Plug-in (Available from QSound and SpinAudio)

exist, try restoring them with the software or obtain a version of the recording.

Sound

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