12. How to use the K15 as a USB DAC for mobile phones and computer?

How to use the K15 as a USB DAC for mobile phones?

[Android phone]

1.K15 input setting: Switches to USB working mode using menu knob or the touch screen operation.

2.K15 output setting: switch to the corresponding output port according to the interface used, switch to [PO] or[PO+PRE]for the front panel, switch to[PO+PRE], [PRE] or [LO] for the rear panel.

3.Connect the mobile phone and K15's[USB In] port through the type-C to type-C cable. (If the adapter cable has an arrow, note that the arrow indicates the signal transmission direction—from your phone to the K15.)

Note: If there is no sound after you connect, you need to pay attention to the following points:

1.Mobile phone playback software settings. If there is a USB output, it needs to be turned on, and some devices have to turn off the USB output to have sound.

2.Confirm whether the mobile phone developer mode has enabled USB debugging. On the mobile phone, you need to turn on USB debugging, turn on "Developer Options", and then turn on the "USB debugging" or "OTG" function.

3.Confirm that the transfer cable supports the OTG function, and whether the direction of the cable is reversed.

4.Since the USB audio of various brands of mobile phones is not standardized at present, FiiO does not guarantee full compatibility. According to the above connection method, if it is not supported, it is recommended to try other mobile phones or connect to the computer DAC to rule out whether the hardware of some devices is bad (such the probability of the situation is small), if it is not possible to connect to the computer, consider repairing or replacing the machine.

[iPhone/iPad]

It is necessary to purchase a cable with OTG function to connect K15 and iPhone/iPad/iPod, and enjoy high-quality music by playing songs.

Note:

When the iOS device is decoding, adjusting the volume of the iOS device is invalid.

How to use K15 as a USB DAC function to connect to a computer?

[Windows computer]

1.Install the latest FiiO USB DAC driver on the computer: Click here

Notice:

This version of the driver can only be used in Win10 and Win11 systems. Win7 and Win8 are not applicable.

2.K15 input setting: Switches to USB working mode using menu knob or the touch screen operation.

3.K15 output setting: switch to the corresponding output port according to the interface used, switch to [PO] or[PO+PRE]for the front panel, switch to[PO+PRE], [PRE] or [LO] for the rear panel.

4.Connect the computer and K15 through a square USB data cable, set the audio output of the computer system and the audio output of the playback software to K15 and then use it.

5.With a computer: How to play general lossless tracks and music in DSD format: Click here

MAC computer

MAC computers do not need to install drivers, just select and set the corresponding sound output device.

It is recommended to adjust the system volume to the maximum, and adjust the output volume of the machine by adjusting the potentiometer.

MAC computer DAC setting introduction: Click here

Linux computer

The Linux system is driver-free. In theory, it can be used directly by connecting it. However, due to the large number of versions, there is no guarantee that all systems can be adapted. If it is connected, it is recommended to use other data cables or USB ports to check. If it is not recognized, it should be is not supported.

Does K15 support driverless function?

Yes. In the system setting menu of the K15, you could switch U-AUDIO option to UAC 1.0. PS5, Switch and other drive-free devices can be supported.