2009 Toyota Corolla Owners Manual - Page 186

3-2. Using the audio system l IExtensions If the file extensions .mp3 and .wma are used for files other than MP3 and WMA files, they will be mistakenly recognized and played as MP3 and WMA files. This may result in large amounts of interference and damage to the speakers. l Playback • To play MP3 files with steady sound quality, we recommend a fixed bit rate of 128 kbps and a sampling frequency of 44.1 kHz. • CD-R or CD-RW playback may not be possible in some instances, depending on the characteristics of the disc. • There is a wide variety of freeware and other encoding software for MP3 and WMA files on the market, and depending on the status of the encoding and the file format, poor sound quality or noise at the start of playback may result. In some cases, playback may not be possible at all. • When files other than MP3 or WMA files are recorded on a disc, it may take more time to recognize the disc. In some cases, playback may not be possible at all. • Microsoft, Windows, and Windows Media are the registered trademarks of Microsoft Corporation in the U.S. and other countries. NOTICE n CDs and adapters that cannot be used (→P. 212) n CD player precautions (→P. 213) 220