- Open tunnels.conf
- Add this blocks:

[MUMBLE-ACETONE-TCP]
type = client
address = 127.0.0.1
port = 64738
destination = plpu63ftpi5wdr42ew7thndoyaclrjqmcmngu2az4tahfqtfjoxa.b32.i2p
destinationport = 64738
signaturetype = 7
inbound.length = 1
outbound.length = 1
gzip=false
i2cp.leaseSetType = 3
i2cp.leaseSetEncType = 4
i2p.streaming.initialAckDelay = 20
crypto.ratchet.inboundTags = 500
keys = transient-mumble-acetone

[MUMBLE-ACETONE-UDP]
type = udpclient
address = 127.0.0.1
port = 64738
destination = plpu63ftpi5wdr42ew7thndoyaclrjqmcmngu2az4tahfqtfjoxa.b32.i2p
destinationport = 64738
keys = transient-mumble-acetone

- Restart i2pd
- Connect to Mumble server at 127.0.0.1:64738
- Enjoy