How do I enable microphone "sidetone" in Ubuntu?

One of the main reasons I prefer gaming on Windows rather than Linux is that the Logitech driver (for windows) allows me to enable microphone "sidetone". When sidetone is tuned up, I can hear myself when talking in the microphone, which makes using the headset for long periods of time much less uncomfortable.

To specify; what I'm looking for is a setting or application that makes the sound input feed directly to the sound output with no delay, at an adjustable volume.

Would this be possible to achieve in Linux? I'm using pulseaudio 4.0 and a Logitech G930 wireless headset.

_{Full disclosure - I'm actually using Debian with Cinnamon, but I also had this issue in Ubuntu and I'm betting that most solutions will work on both systems.}

What have I tried?

I've tried using pacat to record and pipe the microphone input to the default output device:

pacat -r -d alsa_input.usb-Logitech_Logitech_G930_Headset-00-Headset.analog-mono | pacat -p --volume=20000 --latency-mc=1 --process-time-msec=1

But with all the latency-related options set to their minimum, I still get a ~0.25 sec delay from input to output.

Not sure if you still have the Problem. But I've written a little "driver" which allows to adjust the Sidetone setting under linux (You can even set it louder than on windows!). https://github.com/Sapd/G930SideTone