Pioneer AVIC-D1 Installation Manual - Page 21

Appendix MP3, WMA and WAV files Important: • When naming an MP3/WMA/WAV file, add the corresponding filename extension (.mp3, .wma or .wav). • This unit plays back files with the filename extension (.mp3, .wma or .wav) as an MP3/ WMA/WAV file. To prevent noise and malfunctions, do not use these extensions for files other than MP3/WMA/WAV files. • MP3 is short for MPEG Audio Layer 3 and refers to an audio compression technology standard. • WMA is short for Windows MediaTM Audio and refers to an audio compression technology that is developed by Microsoft Corporation. WMA data can be encoded by using Windows Media Player version 7 or later. • WAV is short for waveform. It is a standard audio file format for Windows®. • With some applications used to encode WMA files, this unit may not operate correctly. • Depending on the version of Windows Media Player used to encode WMA files, album names and other text information may not be correctly displayed. • There may be a slight delay when starting playback of WMA files encoded with image data. • This unit allows playback of MP3/WMA/WAV files on CD-ROM, CD-R and CD-RW discs. Disc recordings compatible with level 1 and level 2 of ISO9660 and with the Romeo and Joliet file system can be played back. • It is possible to play back multi-session compatible recorded discs. • MP3/WMA/WAV files are not compatible with packet write data transfer. • When playing discs with MP3/WMA/WAV files and audio data (CD-DA) such as CD-EXTRA and MIXED-MODE CDs, both types can be played only by switching mode between MP3/ WMA/WAV and CD-DA. • The folder selection sequence for playback and other operations becomes the writing sequence used by the writing software. For this reason, the expected sequence at the time of playback may not coincide with the actual playback sequence. However, there also is some writing software which permits setting of the playback order. • Some audio CDs contain tracks that merge into one another without a pause. When these discs are converted to MP3/WMA/WAV files and burned to a CD-R/CD-RW/CD-ROM, the files will be played back on this player with a short pause between each one, regardless of the length of the pause between tracks on the original audio CD. MP3 additional information • Files are compatible with the ID3 Tag Ver. 1.0, 1.1, 2.2, 2.3 and 2.4 formats for display of album (disc title), track (track title), artist (track artist) and comments. Ver. 2.x of ID3 Tag is given priority when both Ver. 1.x and Ver. 2.x exist. • The emphasis function is valid only when MP3 files of 32, 44.1 and 48 kHz frequencies are played back. (16, 22.05, 24, 32, 44.1, 48 kHz sampling frequencies can be played back.) • There is no m3u playlist compatibility. • There is no compatibility with the MP3i (MP3 interactive) or MP3 PRO formats. • The sound quality of MP3 files generally becomes better with an increased bit rate. This unit can play recordings with bit rates from 8 kbps to 320 kbps, but in order to be able to enjoy sound of a certain quality, we recommend using only discs recorded with a bit rate of at least 128 kbps. WMA additional information • This unit plays back WMA files encoded by Windows Media Player version 7, 7.1, 8 and 9. • You can only play back WMA files in the frequencies 32, 44.1 and 48 kHz. • The sound quality of WMA files generally becomes better with an increased bit rate. This unit can play recordings with bit rates from 48 kbps to 320 kbps (CBR) or from 48 kbps to 384 kbps (VBR), but in order to be able to enjoy sound of a certain quality, we recommend using discs recorded with a higher bit rate. • This unit doesn't support the following formats. - Windows Media Audio 9 Professional (5.1ch) - Windows Media Audio 9 Lossless - Windows Media Audio 9 Voice 19