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The ESP pages linked to by Shimofuri are an excellent source of such information. Try simulating the above circuits in SPICE to get a feel for what's going on. So this is the best simple mixing circuit out of the three shown. Then you can link this virtual device to whatever program you want. This works by creating a virtual sound device that must be set as the output sound device of the amp simulator and the input device for jammr. You will be able to connect any external device to your computer, whether it be a stereo or musical instrument, and create a virtual device on your computer. #How to use virtual audio cable to combine two headphones software#Unfortunately there are not any devices that share a USB connection between multiple hosts. Use virtual audio cable software like BlackHole ( to send audio from your amp simulator application into jammr. If we remove an input, the voltage contribution from the other inputs stays the same. If you are working with analog audio signals, there are several options: Here is a cheap one that has 4 inputs and here is a battery powered option with better quality that has 2 inputs. This means that the output voltage is simply (I(R3) + I(R5) + I(R6)) * R1. The feedback resistor R1, matches the sum of the currents flowing through R3, R5, and R6 (in order to keep the inverting input at 0V) ![]() This is a current amplifier, and uses a virtual ground at the summing point to prevent any interaction between the channels. So the output level of each channel is greatly affected by change of the other inputs - not just unplugging, imagine using volume controls.Ī solution to this problem is the active inverting opamp mixer: The Oculus Quest 2 can work with SteamVR by purchasing a link cable that allows the Quest. #How to use virtual audio cable to combine two headphones full#If we unplug another then the full 1V pk-pk will be output. We advise you to use headphones that only take audio output. The signal voltage from each will now be 500mV. Right click on this cable, go to Properties, and then visit the Listentab to finish your setup. ![]() If we unplug one of the signals, we change the loading on the other two and the voltage divider changes. This is okay (as we can add a gain of 3 to the opamp to compensate), as long as we don't unplug one of the signals. With all three plugged in, the contribution of each output will be a maximum of 333mV. This solves the loading issue (now each output sees 3.3k which isn't as bad), but not the voltage dividing issue. the leftmost output will see R1 || (R2 + R3)) One is that in order to keep a low impedance output you need to use low value resistors and this loads each output excessively, plus creates a voltage divider between the outputs.Įach output in the above example would see a 150 ohm load (e.g. ![]() A simple passive resistive mixer is basic, but a bad solution for a couple of reasons: ![]()
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