Is it possible to output audio to multiple devices at the same time?

Question

Android

Googled, Googled, not Googled.
Task. Watch a movie together on a tablet, observing external silence (small child)
Is it possible to output sound on android:
1. Simultaneously to headphones via jack 3.5 and to a Bluetooth headset?
2. Simultaneously to two Bluetooth headsets?
A link to the app would be great. Ruth is.
UPD. A conventional analog splitter for 2 headphones will not work, you need to "untie" at least one person from the tablet (allow you to move without stopping viewing)

Answer 1

I do not think that the question is relevant, but since it is issued on the first page of Google, I will suggest a solution for all those who suffer.
You can use a splitter, as in the first answer (you can simply solder it yourself), and connect a bluetooth receiver to one (or both) of the outputs, which turns a wired headset into a wireless one, of which Ali has an incredible amount at ridiculous prices. The design is somewhat cumbersome, there is no need to talk about sound quality either (digital-analog-digit-analog conversion), but it solves the problem and does not require a stable Internet connection.

Answer 2

I don’t know about the software and possible problems, but there is an elementary solution
, see the current, most of these adapters come with a microphone, you need to check compatibility with headphones, otherwise only one speaker will work

Answer 3

There is a rather interesting AmpMe solution . Not exactly what you ask, but the task of "outputting sound to several devices at the same time" on Android does!