Help with receiving multicast

[Jerry Geis <jerry.geis@xxxxxxxxx>]

Hi - Using ubuntu 20.04 LTS

I have this in my startup:

# Forward 11000 UDP to 9875 for pulse audio
socat UDP4-RECVFROM:11000,fork UDP4-SENDTO:localhost:9875 &

pacmd load-module module-null-sink sink_name=rtpsink format=s16be channels=1 rate=44100
pacmd load-module module-rtp-recv sink=rtpsink sap_address=239.168.3.10

Doing netstat -g shows

IPv6/IPv4 Group Memberships
Interface       RefCnt Group
--------------- ------ ---------------------
lo              1      224.0.0.251
lo              1      all-systems.mcast.net
eno1            1      239.168.3.10
eno1            1      224.0.0.251
eno1            1      all-systems.mcast.net
wlo2            1      all-systems.mcast.net
lo              1      ff02::fb
lo              1      ip6-allnodes
lo              1      ff01::1
eno1            1      ff02::fb
eno1            1      ff02::1:ff1f:6c0e
eno1            1      ip6-allnodes
eno1            1      ff01::1
wlo2            1      ip6-allnodes
wlo2            1      ff01::1

But I do not hear any audio when I multicast from asterisk. There is another SIP speaker that receives the multicast but not my PC.

What am I not doing correct ?

Thanks

Jerry