2013 MAZDA MODEL 3 HATCHBACK compression ratio

lThe number of characters which can be
displayed is restricted.
CAUTION
This unit can only play MP3 files that
have an MP3 file extension (.mp3)
attached. Do not attach an MP3 file
extension to any other type file as it
could cause noise to be emitted or a
malfunction in the unit.
About ID3 Tag display
lThis unit can only display ID3 Tag
album, track and artist names that have
been input using Ver.1.0/1.1/2.2/2.3/
2.4
*1formats. Any other data that may
have been input cannot be displayed.
*1Type Bl(Type A)
This unit can only display English
(including numerals) one-byte
characters. Use only English (including
numerals) one-byte characters when
inputting ID3 tags. Two-byte characters
and some special symbols cannot be
displayed.
l(Type B)
This unit cannot display some
characters. Characters which cannot be
displayed are indicated by an asterisk
(
).
Specialized glossary
MP3
Abbreviation for“MPEG Audio Layer 3”.
A technical standard for audio
compression as decided by the ISO
*1
MPEG working group. Use of MP3
allows for audio data to be compressed to
approximately a tenth of the source data
size.
*1 International Organization for
StandardizationISO 9660
An international standard for logical
formatting of CD-ROM files and folders.
It is divided into three separate levels
based on differences in file naming
procedures, data configuration and other
characteristics.
Multi-session
A session is the complete amount of data
recorded from the beginning to the end of
a single period of CD-ROM, CD-R/CD-
RW data recording. Multi-session refers to
the existence of data from two or more
sessions on a single disc.
Sampling
Refers to the process of encoding analog
audio data at regular intervals and
converting it to digital data. The sampling
rate refers to the number of times a
sample is taken in one second and is
expressed in Hz units. Increasing the
sampling rate improves the sound quality
but also increases the data size.
Bit rate
Refers to the volume of data per second,
expressed in bps (bits per second).
Generally, the larger the number of the
transfer bit rate when compressing an
MP3 file, the more information regarding
musical reproduction it carries, and
therefore the better the sound quality.
Packet writing
A general term for the method, similar to
that used for floppy discs or hard drives,
of recording the required file in a single
increment on a CD-R and similar.
6-24
Interior Comfort
Audio System

ID3 Tag
ID3 tag is a method for storing
information related to the music in an
MP3 file. Information such as track, artist
and album name can be stored. This
content can be freely edited using ID3
editing function software.
VBR
Abbreviation for Variable Bit Rate. While
CBR (Constant Bit Rate) is generally
used, VBR varies the bit rate for audio
compression according to compression
conditions and this allows for
compression with preference given to
sound quality.
qOperating Tips for WMA
WMA is short for Windows Media Audio
and is the audio compression format used
by Microsoft.
Audio data can be created and stored at a
higher compression ratio than MP3.
* Microsoft and Windows Media are
registered trademarks of Microsoft
Corporation U.S. in the United States
and other countries.
Playable WMA files are as follows:
Item Content
Audio Type Type A Type B
SpecificationWindows
Media Audio
Version 7.0,
8.0, 9.0Ver 7.0, 8.0,
9.0 (standard)
Ve r 1 0
(standard)
Sampling rate 32/44.1/48 kHz
Bit rate 32―320 kbps
CAUTION
This unit plays files with the (.wma)
file extension as a WMA file. Do not
use the WMA file extension for files
other than WMA files. Otherwise, it
could result in noise or a
malfunction.
lTrack, artist and album name
information is recorded as data termed
“WMA-Tag”, and this information is
displayable.
lWMA files written under specifications
other than the indicated specification
may not play normally or files or folder
names may not display correctly.
lThe file extension may not be provided
depending on the computer operating
system, version, software, or settings.
In this case, add the file extension
“.wma”to the end of the file name, and
then write it to the disc.
qOperating Tips for AAC
Advanced Audio Coding (AAC) is
standardized voice compression
established by the ISO
*1working group
(MPEG). Audio data can be created and
stored at a higher compression ratio than
MP3.
*1 International Organization for
Standardization
Playable AAC file specifications
This unit supports playback of AAC files
recorded in CD-R and CD-RW.
Interior Comfort
Audio System
6-25

AudioPilot®2*(Bose®Sound System-
equipped model)
AudioPilot
®2 automatically adjusts audio
volume and sound quality in accordance
with the level of noise entering the vehicle
interior while driving. When AudioPilot
®
2 is turned on, the system automatically
calculates the conditions for optimum
hearing of sound which may be difficult
to hear depending on exterior noise.
* AudioPilot
®2 is a registered trademark
of Bose Corporation.
Centerpoint®*(Bose®Sound System-
equipped model)
Centerpoint
®offers you the experience of
5.1-channel surround sound in your
vehicle even with your conventional 2-
channel stereo CDs.
Centerpoint
®can be set on or off.
NOTE
lCenterpoint®operates optimally with a 2-
channel stereo CD. MP3 audio files can be
played, however, MP3 audio files encoded
with high compression may result in poor
sound quality.
lCenterpoint®is available for 2-channel
stereo audio except for AM radio/FM radio/
SIRIUS digital satellite radio/AUX/BT
audio.
* Centerpoint®is a registered trademark
of Bose Corporation.
BEEP setting
The beep-sound when operating the audio
system can be set on or off.
ILLM EFT setting (Action Illumination
setting during operation)
The audio system illumination during
operation can be set on or off.
Welcome mode (Welcome sound)
Sound is heard when the ignition is
switched ON.
BT SETUP modeí
Music and other audio such as voice data
recorded on portable audio devices and
mobile phones available on the market
which are equipped with the Bluetooth
®
transmission function can be listened to
via wireless transmission over the
vehicle's speakers. Using the BT SETUP
mode, these devices can be programmed
to the Bluetooth
®unit or changed.
Refer to Bluetooth® Audio (Type A) on
page 6-108.
Interior Comfort
Audio System
6-37íSome models.

AudioPilot®2*4
AudioPilot®2 automatically adjusts audio
volume and sound quality in accordance
with the level of noise entering the vehicle
interior while driving. When AudioPilot
®
2 is turned on, the system automatically
calculates the conditions for optimum
hearing of sound which may be difficult
to hear depending on exterior noise.
AudioPilot
®2 can be set on or off.
*4 AudioPilot®2 is a registered
trademark of Bose Corporation.
Centerpoint
®*5
Centerpoint®offers you the experience of
5.1-channel surround sound in your
vehicle even with your conventional 2-
channel stereo CDs. Centerpoint
®can be
set on or off.
*5 Centerpoint
®is a registered trademark
of Bose Corporation.
NOTE
lCenterpoint®operates optimally with a 2-
channel stereo CD. Audio files encoded
with high compression can be played,
however, they may result in poor sound
quality.
lCenterpoint®is available for 2-channel
stereo audio except for AM radio/FM radio/
AUX/USB/iPod/Bluetooth® audio.
Sound setting reset
The settings for bass, treble, balance, and
fade can be returned to their initial
settings.
1. Touch the
on-screen button.
2. Touch the
on-screen button.
6-66
Interior Comfort
Audio System

Specifications
qEngine
ItemSpecification
MZR 2.0 SKYACTIV-G 2.0
Type DOHC-16V in-line, 4-cylinder
Bore × Stroke 87.5 × 83.1 mm (3.44 × 3.27 in) 83.5 × 91.2 mm (3.29 × 3.59 in)
Displacement 1,999 ml (1,999 cc, 122.0 cu in) 1,998 ml (1,998 cc, 121.9 cu in)
Compression ratio 10.0 12.0
ItemSpecification
MZR 2.3 DISI Turbo MZR 2.5
Type DOHC-16V in-line, 4-cylinder
Bore × Stroke 87.5 × 94.0 mm (3.44 × 3.70 in) 89.0 × 100 mm (3.50 × 3.94 in)
Displacement 2,261 ml (2,261 cc, 138.0 cu in) 2,488 ml (2,488 cc, 151.8 cu in)
Compression ratio 9.5 9.7
qElectrical System
ItemClassification
MZR 2.0 SKYACTIV-G 2.0
Battery 12V-50Ah/20HR or 12V-65Ah/20HR 12V-60Ah/20HR or 12V-65Ah/20HR
Spark-plug numberMazda Genuine
spark plugLFJD-18-110 or
L3Y2-18-110Mazda Genuine
spark plug
*1PE5R-18-110 or
PE5S-18-110
ItemClassification
MZR 2.3 DISI Turbo MZR 2.5
Battery 12V-60Ah/20HR or 12V-65Ah/20HR12V-50Ah/20HR, 12V-60Ah/20HR, or
12V-65Ah/20HR
Spark-plug numberMazda Genuine
spark plugL3BD-18-110 or
L3YD-18-110Mazda Genuine
spark plugLFJD-18-110 or
L3Y2-18-110
*1 This spark plug provides the SKYACTIV-G engine with optimum performance. Contact an Authorized Mazda
Dealer for details.
CAUTION
When cleaning the iridium plugs, do not use a wire brush. The fine particulate
coating on the iridium alloy and platinum tips could be damaged.
10-4
Specifications