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Version:Announcement of Cayin N5ii Firmware v2.1EN
Date:2017-12-26 01:12:07
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Announcement of Cayin N5ii Firmware v2.1EN

The holidays are here again, and we want to express our sincere appreciation for your confidence and loyalty. We hereby offer our first major firmware update to Cayin N5ii DAP.  We aren’t perfect, but we are getting there, and we are thank you for travelling the journey of sound with us

With Cayin, your music will never be the same again


New Functions and System Optimization

1. Add new feature to stop the native music player and all Third Party Applications by holding the Play/Pause button on the right side panel. The player will go back to Main Menu after terminated all applications.  

2. Add new feature to enable selection of DoP or D2P in DSD output. The selection is effective for both S/PDIF and DSD Audio output.

3. Optimize power management to extend the duration of battery operation: single-ended phone out 12 hours, balanced phone out 9.5 hours (Audio Priority mode, screen off, minimal operation and single music format)

4. Enhance system operation by removing unnecessary task and applications from customized Android system.

5. Enhance displayed music file sampling information on playback screen

6. Enhance and modify selected User Interface 

7. Modify output setting of balanced phone out, enable user to select Audio Priority Mode manually.

8. Modify the identification of Bit rate and Sampling frequency of music files (effective after music scan)

9. Modify default maximum volume setting to 100

10. Bug fix: random pause/suspend during playback (most likely happened in 2.5mm headphone output)

11. Bug fix: volume turned up to maximum under specific operation sequence

12. Bug fix: wrong sequencing of playlist

13. Bug fix: random pause/suspend when insert single-ended headphone to the player

14. Bug fix: missing file when enable “Filter non-music files and folder” in Music Scan setting.

15. Remove icon on right side of Artist page

16. Other Optimizations


Firmware Upgrade Procedure


Cayin will release firmware update to enhance and optimize N5ii as deem required, the new firmware can be acquired through OTA or manual download, since the content of these firmware are identical, you can select whichever upgrade option that fit your needs.


Please make sure the device has sufficient battery power before you proceed.  Please confirm the device has not less than 50% battery power; otherwise please charge up the player before you proceed to firmware upgrade.


Option 1: Local Upgrade Procedures


Because the file size of the N5ii firmware is relative large (around 300+ MB), the most efficient option is to download the firmware package with wired network and perform the firmware upgrade manually as follow:

1. Download firmware upgrade package from Cayin website, you should receive a compressed document N5MK2-ota-XXXX.zip 

2. Do not DECOMPRESSED the firmware upgrade package, copy the zip file to the root directory of internal storage or TF card of N5ii as-is.

3. Hold on the previous key of right side panel and then press Power On/Off button until the player go into recovery mode.

4. Specify firmware file location with the Volume control or previous/next buttons,

    a. select “apply update from internal storage” if the firmware file is stored on internal storage, Click Power button to confirm your selection.

    b. select “apply update from external storage” if stored on TF card. Click Power button to confirm your selection.

N5ii Manual Firmwre Upgrade 01.jpg  N5ii Manual Firmwre Upgrade 02.jpg

5. You can move up and down to select xxxxx.zip via volume or previous/next buttons and press power button to activate the upgrade process.

6. N5i will automatically go back into recovery operation screen, select “reboot system now” and press power button to reboot into regular operation.

Option 2: OTA Upgrade Procedure

Please check your current firmware and make sure you are using firmware version 1.1 or above.  If your N5ii is installed with v1.0 firmware, please use manual upgrade option to upgrade your N5ii to a newer version.  OTA firmware upgrade is only available to N5ii with firmware v1.1 or subsequent versions.


When you connect your N5ii to a Internet ready WiFi connection, the DAP will detect a new firmware and alert you for firmware upgrade. 

N5ii OTA Firmwre Upgrade 01.jpg  N5ii OTA Firmwre Upgrade 02.jpg

The download time might vary from 30 minutes to several hours, depends on the number of concurrent upgrade users on the server.  To improve our server efficiency, OTA will start 1 day later, and we’ll phase in the upgrade service by pushing the upgrade notification to selected N5ii units based on the last digit of the serial number over a course of 5 to 10 days. If you didn’t receive upgrade notification after we announced the new firmware, please wait patiently or opt for manual upgrade instead.


N5ii OTA Firmwre Upgrade 03.jpg  N5ii OTA Firmwre Upgrade 04.jpg

As long as you stay connected with WiFi, you can use your DAP as-is while downloading the firmware at background.  At the end of the download process, you’ll be prompted to confirm the installation of new firmware.

N5ii OTA Firmwre Upgrade 05.jpg  N5ii OTA Firmwre Upgrade 06.jpg

At the end of the firmware installation, N5ii will turn off itself automatically and power on again. You will be advised to delete the firmware package in order to avoid repeated upgrade accidentally.  Please verify that your N5ii is operating with the new firmware, you can find out the firmware information from the “About” option in Application Menu (swipe the screen from left “edge” to right).

N5ii OTA Firmwre Upgrade 07.jpg  N5ii OTA Firmwre Upgrade 08.jpg


1. Do not operate the machine during firmware upgrade

2. Please delete/remove the firmware file from the internal storage/TF card after firmware upgrade

3. Please perform a complete Music Scan after firmware upgrade.

4. If you are using TF card to upgrade N5ii firmware, please make sure you only insert the TF card with firmware package into the DAP. Inserting two TF cards into the DAP during firmware upgrade might cause system failure because the system might not be able to identify the firmware package correctly.

5. If you feel the DAP is not performing satisfactory after firmware upgrade, please wipe cache partition (in recovery mode) and restart the system.

6. If the system freeze or cannot resume to regular operation after firmware upgrade, you can turn off the device by holding the Power on/off key for 12 seconds.  The system will shut down in regardless of operation status.  If problem persist, you can perform a Factory Reset (under Setting menu) or Wipe data/factory reset (in recovery mode) to resume the system.

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