ReadonlyoutputsReadonlyconnectionsEvery connect call with its output/input indices (channel routing tests).
ReadonlycontextReadonlychannel(output index, target, input index) triples for every connect call.
ReadonlychannelsOptionaltarget: AudioDestinationNode | FakeAudioNode
ChannelSplitterNode/ChannelMergerNodestand-in recording per-channel wiring.