2021 Microchip Technology Inc. DS00003118C-Page 63
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APPENDIX G: LDAC APPLICATION
UNGROUPED MODE A2DP PLAYBACK:
LDAC audio CODEC can be used during ungrouped
A2DP playback with Sony mobile or Android 8.x
devices. On the other hand, SBC CODEC will be used
if the speaker is in Stereo mode or Concert mode.
LDAC FORMAT
Microchip utilizes Sony LDAC audio CODEC, which
provides high-resolution audio in Ungrouped mode.
LDAC bitrate can be 990 kbps (Quality Priority mode),
660 kbps (Normal mode) and 330 kbps (Connection
Priority mode). The user can select the bit rate on the
mobile devices and the speaker will automatically
support it. Also, the speaker can support 44.1 kHz, 48
kHz, 88.2 kHz and 96 kHz, so the user can decide the
sampling rate using the LDAC mobile device.
According to the Sony LDAC web page, https://
www.sony.net/Products/LDAC/, modes and bitrate are
listed in Ta b l e 4.
LDAC CERTIFICATION
The branded customer receives an LDAC logo by using
the Microchip LDAC test report. The Non-branded
customer must collaborate with the Branded customer
to apply for the license.
LDAC BLUETOOTH AUDIO STREAMING
Most of the Sony mobiles and Android 8.x mobile
devices support LDAC Bluetooth audio streaming.
Mobile phones have their default Bluetooth audio
CODEC setting. Some mobile phones may have
default SBC or LDAC even when they are connected to
an LDAC speaker.
After pairing and connecting to the ungrouped speaker,
the user needs to check whether or not the mobile
phone is using LDAC CODEC. The following example
shows how to use Sony Xperia
®
Z5 and Google Pixel™
for LDAC streaming. For more details on the LDAC
setup in the mobile phone, refer to the steps below.
Sony mobile devices provide a setting page to select
the following LDAC audio quality:
• Quality Priority mode
• Normal mode
• Connection Priority mode
Android 8.x devices may or may not provide a setting
page to select LDAC settings.
For example, for Sony Xperia Z5 (E6663) and Android
6.0 devices:
1. When the Android 6.0 mobile device is con-
nected to the speaker, it will not show “LDAC” in
the Bluetooth setting page, see Figure 66.
TABLE 4: TRANSMISSION RATES
Mode Bit Rate
Sound Quality preferred 990 kbps
Standard 660 kbps
Connection preferred 330 kbps
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