Fiio M15S User manual

All the pictures below are for illustrations only. Specifics are subject to the
actual product.

Foreword
Thank you so much for purchasing FiiO's portable high resolution lossless
music player M15S. We have prepared this complete user manual for you. We
hope this manual can help you get the hang of the M15S and unleash its full
potential.
An introduction to the M15S
The new M15S starts a new chapter in the FiiO high-end, sharing the same
technologies as the portable desktop-grade M15S player and the portable
desktop-grade amp Q7 that give you desktop-level performance in a portable
package –including desktop mode, dual power supply modes, and five gain
levels.

Buttons and ports
1. Pictorial guide to buttons and ports
(Pictures are for reference only. The real product may vary.)
2. Instructions for buttons and ports
①Volume knob：M15S uses the volume knob to adjust the volume by default.

At this time, the volume button cannot adjust the volume. If you need to switch,
you can enter Settings-Global, click "Volume Adjusting Mode", select "Adjust
by Volume button" or "Adjust by Volume Knob".
②Power/Lockscreen: long press it for about 2 seconds when the device is off
to turn it on; long press it when the device is on the pop up the menu of
reboot/shutdown; short press it when the device is on to turn off/wake up the
screen; long press it for about 10 seconds to reset the device.
③Previous track: short press to play the previous track; long press to rewind.
④Play/Pause: short press it when music is playing to pause the music; short
press it when music is paused to resume the playback.
⑤Next track: short press to play the next track; long press to fast forward.
⑥Indicator light: you can customize it on the Settings->Display->Indicator light
control menu.
⑦Hold switch: you can customize it. After turning it on, the buttons and knobs
that are in the off state will be locked.
⑧Volume up: short press to increase the volume, press the volume down
button.
⑨Volume down: short press to decrease the volume.
⑩Multi-function button：You can customize the multi-function buttons to select
a frequently used function for one-button quick start.
For example, you can set the button to add to favorites, random play,
play/pause, switch filter, switch equalizer, delete the currently playing song,
switch to USB DAC mode, switch to Bluetooth mode, no function, etc
⑪3.5mm headphone/line out/coaxial output：supports 3.5mm
headphone/line-out output/ coaxial output.
⑫2.5mm balanced headphone out：supports 2.5mm balanced headphone
output.
⑬4.4mm balanced headphone/line out：supports 4.4mm balanced

headphone/line-out output.
⑭Type-C data/Charging port：supports data transfer with computer, USB DAC,
USB Audio output, USB OTG, USB charging and other functions
⑮MicroSD card slot：supports one TF card (micro SD card), theoretically up to
2TB expansion.
Status bar and display page
1.Status bar
The status bar on the top screen shows the working states of the M15S.

2. Icons in drop-down menu
3. Icons of working modes
4. Icons of setting menus

5. Homepage and drop-down menu
Instructions for entry-level functions
1.Five working modes
The M15S has 5 independent working modes: Android mode, Pure Music
mode, Bluetooth Receiving mode, USB DAC mode and AirPlay mode. It is
defaulted to be the Android mode, which can be switched to other working
modes in the drop-down menu.
If the player is in other modes but not the Android mode, you can switch it to
other modes through the selection on the display, or tap Settings->Exit to go
back to Android mode.

Android mode
Third party applications will be available at will. It can be switched to other
modes on the drop-down or settings menu.

Pure Music mode
Third party applications will be automatically disabled while FiiO Music app will
be auto-enabled. It can be switched to other modes on the drop-down or
settings menu.
USB DAC mode
In USB DAC mode, the M15S can be connected to other devices like a
computer, working as a USB DAC/Amp. It can be switched to other modes on
the drop-down or settings menu.
Notes:
1. When the M15S is going to work in the USB DAC mode for the first time in
Windows computer, FiiO's exclusive USB DAC driver is required. Please
download it on our website and follow relevant instructions to install it.
2. When the M15S is used as USB DAC for iOS device, please enable the
‘iOS devices decoding’ option in the setting menu first.

Bluetooth Receiving mode
1. When switching to the Bluetooth Receiving mode for the first time, the M15S
will automatically enter the pairing state. The next time it enters Bluetooth
Receiving mode, it will reconnect to the last connected device automatically.
2. Go to the Bluetooth transmitting list of the mobile phone, and tap the M15S
to complete the connection.
-Force the device to enter pairing mode: Hold the Play/Pause button for about
3 seconds.
-Manually enter reconnecting mode: Short press the Play/Pause button when
not in pairing mode.
-Clear current pairing: Hold the Previous and Next track buttons at the same
time for about 3 seconds.
-Play/Pause: Short press the Play/Pause button.
-Previous/Next track: Short press the Previous/Next track button.

AirPlay
When working in AirPlay mode, the M15S requires a valid WiFi connection.
Please confirm that it is connected to an available network before entering
AirPlay mode.
There are mainly 3 steps.
1. Make sure the M15S and your iOS devices are connected to the same WiFi
network.
2.Switch the M15S to theAirPlay mode.
3.On the drop-down menu of the iOS device, choose the M15S as the playing
device. So the M15S can receive audio signals from the iOS device.

2. How to access the storage/SD card after connecting the M15S to a
computer?
For Windows computers, it is driver-free. After connecting the M15S to the
computer by the included USB cable, the driver will be automatically installed.
Then the FiiO M15S disk can be directly seen on the computer.
Mac computers need a driver.
1.After connecting the M15S to the Mac computer, click the ""NO NAME""
folder emerging on the desktop->double click Mac->Mac/MAC OS MTP
Client->Android File Transfer.dmg. Drag the ""Android File Transfer.dmg"" to
the desktop of the computer.
2. Drag the ""Android File Transfer"" file to the ""Applications"" folder and wait
for the completion of the copy.
3. Enter ""Applications"", and double click the ""Android File Transfer"". Then
you can manage the files stored in the internal storage of the M15S or the
Micro SD card.
Notes: The M15S folder will directly pop up the next time it is being connected

to the same computer.
3. How to upgrade firmware?
The M15S supports online upgrade and local upgrade.
1.Online upgrade
If a new firmware is available and can be detected (with the M15S connected
to an available internet), an upgrade notification will show up in the notification
center. Tap on it to enter the update menu for the online upgrade. If there's no
upgrade notification showing up, you can go to the ""Technical
Support->Firmware Upgrade"" menu, and tap the ""Check for updates"" icon to
check manually.
2.Local upgrade
Also, the M15S can be upgraded locally by a firmware package. Download the
firmware package file from FiiO website, and copy it to the internal storage of
the M15S or an SD card. Go to the ""Technical Support->Firmware
Upgrade->Local Upgrade"" menu, and find the firmware package file to start
the upgrade.

Notes:
1.Do not unzip the firmware package file.
2.Before the upgrade, ensure the power of the device is adequate (>30%) so
to avoid upgrade failure.
3.If the device goes to factory mode which cannot detect the firmware, the
reason may be that the firmware file is damaged. At this time, press the power
button to reboot the device. Re-download the firmware file and restart the
upgrade..
4. How to install third-party apps?
There are two ways to install applications that are similar to mobile phones'.
1.After connecting the device to a valid WiFi, go to FiiO market, Google Play or
other app markets to download and install the app directly.
2.Local installation: copy the APK file to the M15S. Go to the file management
menu to find the file and install it.
5. How to change the language?
Go to Settings->System->Languages and input->Languages->+Add a
language to choose the intended language. Press the "=" icon on the right side
and drag it to the first line to select the language successfully.
The language of the FiiO Music app defaults to follow the system's. You can
also go to FiiO Music app-> Settings->Languages to choose the language
independently.

6. How to enable the USB DAC function?
For Mac computers, it is driver-free.
For Windows computers, please make the settings as the followed steps.
1.Install the FiiO DAC driver in the computer first.
2.Switch the working mode of the M15S to USB DAC mode on the drop-down
menu or go to Settings->Mode choose menu to enter the USB DAC mode.
3. Connect the M15S to the computer by the USB port. Select the M15S as the
audio input both in the computer and the music app, so it can work.
Notes:
1. When in the USB DAC mode, the M15S does not support Bluetooth
transmitting.

2. When the M15S is used as USB DAC for iOS device, please enable the ‘iOS
devices decoding’ option in the setting menu first.
7. How to use the M15S as a Bluetooth receiver?
1. Go to the drop-down or Settings menu of the M15S, and choose the working
mode as Bluetooth receiving mode.The M15S will enter pairing state
automatically at the first time.
2. Go to the Bluetooth transmitting list of the mobile phone, and tap the M15S
to complete the connection.
Note:
1. You could hold the play/pause button for 5 seconds to re-enters pairing state
in the M15S.
2. The M15S will reconnect the Bluetooth device connected previously after
enter Bluetooth receiving mode again.

8. How to use the M15S as a Bluetooth transmitter?
It is similar to the mobile phone's. Here are the instructions.
1. Go to the Settings->Bluetooth menu to turn on the Bluetooth function.
2.Make the Bluetooth receiving device, such as Bluetooth earphones, enter
the pairing state. (Please refer to the user manual of the Bluetooth receiving
device about how to enter pairing state.)
3.Go to the Bluetooth device list of the M15S->Pair new device to complete the
connection.
What can be done if the M15S fails to connect to Bluetooth earphones?
If it fails to connect to Bluetooth earphones for the first time, please make sure
the earphones are under pairing state (the connection will fail if the earphones
are under reconnecting state for the first-time connection). Go to the Bluetooth
menu of the M15S to start the connection.
What Bluetooth codecs does the M15S support? And how to switch the
Bluetooth codecs?
The M15S supports LDAC, aptX-HD, aptX, AAC and SBC which can be
switched on Settings->Audio->Wireless playback quality menu.
What can be done if the volume is too low when the M15S is connected to
AirPods?

Go to Settings->About phone, and continuously tap the ""Build number"" 7
times. Go back to Settings->System->Developer options menu to turn off
the""Disable absolute volume"". Disconnect and reconnect the two devices
through Bluetooth.
9. How to enter enhanced over-ear headphone mode(Ultra High mode)
and Desktop mode?
When the M15S is connected to fast charging adapter, the enhanced over-ear
headphone mode could be enabled. At this time, the system will pop up a
window to prompt the selection of Ultra High Mode and Desktop mode. And
the enhanced over-ear headphones mode will be added to the gain setting
menu. Please choose whether to switch according to your needs.
Ultra High Mode
The max output power will be1200mW@32Ω in the ultra high mode, and the
power supply of
the amp module will be increased to +7.6V.
Desktop mode
When the desktop mode is selected, the machine will be powered by USB, and
its battery will neither be charged nor powered, effectively increasing battery
life.
How to exit Desktop mode?
You could turn off the Desktop mode from system setting-General-Desktop
mode.

Introduction to system settings menu
Here is the system settings menu of the M15S

1.WiFi
The M15S supports a WiFi connection of 2.4/5G dual-band for music
resources access. Here are the steps to connect the M15S to a new WiFi
device.
1) In the settings menu of the M15S, tap "WiFi".
2) Turn it on. The M15S will automatically search for and list available WiFi
devices nearby.
3) Tap the intended WiFi device and connect them.
2.Bluetooth
The M15S supports lots of Bluetooth codecs for both transmission and
reception, allowing for rich wireless connections.
Bluetooth transmitter instructions
When being a Bluetooth transmitter connecting to new Bluetooth devices
(such as Bluetooth headphones, Bluetooth speakers), the M15S needs to pair
with the Bluetooth device first. Here are the steps.
1. Go to the Settings->Bluetooth menu to turn on the Bluetooth function.
2.Make the Bluetooth receiving device, such as Bluetooth earphones, enter
the pairing state. (Please refer to the user manual of the Bluetooth receiving