If you are using a vivo phone, if you mean to connect an external sound card, you can refer to the following methods:
1, first of all, do not connect the phone to the sound card, first connect the device that needs to be inserted into the sound card, and then finally connect the sound card to the phone;
2, 3.5mm interface vivo cell phone, support impedance does not exceed 40,000 ohms sound card;
3, Type-C interface of the vivo phone, support impedance does not exceed 100000 ohm sound card;
4, if the phone only Type-C headset interface, you can use an adapter cable to connect the sound card; if the phone has a 3.5mm interface, it is recommended to use the 3.5mm interface to connect the sound card.
Note: The ohm count of the sound card can be referred to the sound card manual.
Satisfy the above conditions, can be used normally, if you can not use, you can enter the Vivo official website / Vivo Mall APP - My - online customer service or Vivo official website web version - slide down to the bottom - online customer service - enter the artificial customer service to enter the advisory feedback.
Note:
There is a 3.5mm headphone jack, the USB port only supports digital audio output, the sound card on the market generally does not support, please plug the sound card in the headphone jack to use.
If there is only one Type-C headphone jack, it supports both digital and analog audio output. If the sound card can be plugged directly into the Type-C port, it can be used directly; if it is not a Type-C port, please purchase a Type-C adapter cable and connect it to work normally.