How to use live_audio with virtual audio device on Windows 10

i manage to get what you want via https://vac.muzychenko.net/en/
this software is not a freeware.

# Audio from Helm and fx applied on it
# virtual-audio-cable "trial" version : trial trial women sings
# https://vac.muzychenko.net/en/download.htm


use_real_time
with_fx :echo do
  live_audio :fromHelm
end


live_loop :drums do
  sample :bd_ada
  sleep 1
end

# loopmidi to send midi notes to Helm
# after we can change the parameters from Helm and sonic pi is able to record them and
# apply an echo effect see above live_audio

live_loop :midiToHelm, sync: "/live_loop/drums" do
  midi [:e3, :e2].tick, port: "loopmidi-port-01"
  sleep 4
end

live_loop :hits_hats, sync: "/live_loop/drums" do
  sample :drum_cymbal_closed, amp: [0.5, 0.75,  0.45, 1].tick
  sleep 0.25
end

and i discover this https://discuss.cakewalk.com/index.php?/topic/3519-odeus-asio-link-now-available-free/ . It seems to be free now. but a bit more complex…

this conversation can be useful to find a solution