Acoustic Research M2 Firmware 2.5.6 Release Note 4th April ,2016
Change log:
2.5.6
Gapless playback support
Correct misdetection of sample rate in playing some Apple Lossless (ALAC) files
2.3.1
Korean IME included
2.2.1
Improved compatibility for the WAVE-EX format
2.1.0
Revised power saving scheme
Reduces possible ‘pops’ caused by enabling/disabling the analogue circuitry
Reduced power consumption for 16/44.1kHz CD quality playback
Additional support for non-unicode ID3 tags in MP3 files
Notes and Requirements for Firmware Update
Firmware upgrade is not field reversible. After the firmware upgrade, customers will not be able to revert the firmware
back to earlier version.
1GB free space or more is available on the internal storage of M2
Windows 7/8/10 or newer
Mac OS X 10.6.9 or above with Android File Transfer installed
Upgrade should only be executed when the battery level is 80% or higher
Procedures to Update Firmware
1. Download the firmware file HIFI-8926-ota-eng_mmc.zip
2. Connect AR-M2 to the computer with Micro USB data cable
3. For PC users, run Windows Explorer. Open ARM2 > Internal SD card.
Copy the file into the root level of Internal SD card
For Mac users, run Android File Transfer (if it does not launch automatically)
If a micro SD card has been installed, please select Internal SD card.
Copy the file into the root level of the Internal SD card.
4. Disconnect AR-M2 from the computer after the file transfer completes
5. Open Settings > About devices, select System update
6. Select Local updates > FOLDER > Internal storage
7. Select HIFI-8926-ota-eng_mmc.zip
8. After the prompt “Are you sure to reboot?” appears, select OK
The firmware update will be executed.
Please do not interrupt the firmware update process until completion.