Connecting 5K to multiple source devices

5K is a multi-functional DAC supporting Bluetooth A2DP and USB Audio Class. As in the block diagram below, you can have multiple connections simultaneously with two Bluetooth Audio source devices and one USB Audio source device. 5K can keep the connections with multiple source devices, Bluetooth or USB, but it can stream audio from a single source device one by one at a time.

For example, a smartphone and a pc can stream audio to the 5K simultaneously over Bluetooth and USB, respectively. In this case, 5K needs to select one input source based on its priority policy.

 

 

Multiple connections with multiple source devices

5K can stream audio from one source device at a time, thus, when multiple source devices stream audio to a 5K simultaneously, 5K selects one input.

 

Bluetooth and USB icon buttons

They appear when 5K connects with each source device over the respective link. The icon in Red represents the active audio source currently streaming. The icons are buttons, and pressing an icon would change the input priority.

 

 

Multiple connections with a single source device

You can connect a 5K to a smartphone with Bluetooth and USB. In this case, the smartphone has two output devices; one is 5K Bluetooth, and the other one is 5K USB. A source device (i.e., a smartphone or a pc) can't output audio to multiple devices. So users SHOULD select the output device to use among the available audio output devices

*Note that this is nothing to do with the 5K input priority. Instead, you must select the audio output device to use through the iOS/Android control panel.

 

  

 

Bluetooth Auto Disconnect for USB DAC

'Bluetooth Auto Disconnect for USB DAC' is a new feature with the software v2.0. 5K automatically disconnects any existing Bluetooth Audio Link when connected to a USB Host. And if the USB is disconnected, 5K reconnects the Bluetooth Audio Link. It only disconnects the Audio Link so that you can keep the Qudelix iOS/Android App and the voice call over Bluetooth.

For example, When you plug a 5K into a smartphone over USB, the 5K automatically disconnects the Bluetooth Audio link. Then, you unplug the 5K from the smartphone, and the 5K automatically reconnects the Bluetooth Audio link.
This way, the smartphone will have only one audio output device at a time, the 5K Bluetooth or the 5K USB. It can save you from the tedious work of selecting an audio output device repeatedly.

 

 

 

iPhone USB DAC connection

To connect a USB DAC with an iPhone lightning port, we need a Lightning to USB-C OTG Cable Or Apple Camera Kit.

However, unlike Android USB-C, the lightning port only provides the output current to the accessory up to 150mA. And if the accessory device draws too much power from the lightning port, the iPhone will drop the connection.

You can temporarily turn off the 5K built-in charger for this use case. (The app, Device, Battery, Charger Control --> OFF)