this video demo's an advanced setup for a Morse code audio qso over Mumble using the "ZamGate CW Keyer" for both the MUMBLE INPUT and the MUMBLE OUTPUT - the ZamGate CW Keyer therefore provides the Morse code audio tones for the Mumble INput and the Mumble OUTput...this setup is also using the Vlevel app to keep the volume of the mumble audio output the same no matter how loud or weak the other Mumble CW OP(s) is(are)
http://vlevel.sourceforge.net/about/
with this ZamGate CW Keyer setup, you can keep the volume exactly the same for both the transmit and receive mumble Morse Code audio tones, you can keep the volume the same for every CW OP you are copying...you can also adjust their(and your) CW PITCH, VOLUME, RISE/FALL TIME, WEIGHT on all CW, no matter what the other CW OP is using to send with...
this setup also prevents FULL VOLUME OPUS AUDIO spikes from hurting your ears, the OPUS AUDIO SPIKES, due to network congestion, packet losses, packet delays....etc...can be quite a nuisance... there are also other various audio artifacts that you might hear when using VOIP technology, that will be "shaped" by the ZamGate CW Keyer...to have the same rise/fall time as the CW TONES you are using....so you don't get harsh blasts of audio anomalies from packet losses at zero rise/fall times which can create high pitched harmonics... and other various aoIP QRN and aoIP QRM etc...
see here for more info on the ZamGate CW Keyer: