Mazda 2013 Mazda3 Owner's Manual page 267

Interior Comfort
Audio System
Playable AAC files are as follows:
Item
Specification MPEG-4 AAC
8/11.025/12 kHz
Sampling rate 16/22.05/24 kHz
32/44.1/48 kHz
Bit rate 24―320 kbps
CAUTION
This unit plays files with the file
extension (.m4a) as an AAC file. Do
not use the AAC file extension for files
other than AAC files. Otherwise, it
could result in noise or a
malfunction.
Song, artist, and album name
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information in the AAC file is recorded
as data termed
"iTunes, m4a, Meta-Data applicable",
and this information is displayable.
AAC files written under specifications
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other than the indicated specification
may not play normally or files or folder
names may not display correctly.
The file extension may not be provided
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depending on the computer operating
system, version, software, or settings.
In this case, add the file extension
".m4a" to the end of the file name, then
write it to the disc.
6-26
Content
qOperating Tips for USB device
This unit supports playback of MP3/
WMA/AAC files recorded to USB device.
NOTE
Music data (MP3/WMA/AAC (.m4a)
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format) stored in a USB mass-storage class
compliant device (such as USB flash
memory) can be played.
Playback may not be possible depending on
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the type and condition of the USB flash
memory even if the audio file complies with
the standard above.
A copyright protected WMA/AAC file
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cannot be played in this unit.
The order of the music data stored in the
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device may differ from the playback order.
To prevent loss or damage of stored data,
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we recommend that you always back up
your data.
If a device exceeds the maximum electric
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current value of 1 A (Type A), 500 mA (Type
B), it may not operate or recharge when
connected.
Do not pull out the USB device while in the
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USB mode (only pull it out while in FM/AM
radio or CD mode).
The device will not operate if the data is
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password protected.