Merging of two stereo sinks to a reversible 4.0 surround setup and mirrored stereo setups in pipewire

S02-combined-sinks.conf

# Thrown in ~/.config/pipewire/pipewire.conf.d

context.modules = [
{   name = libpipewire-module-combine-stream
    args = {
        combine.mode = sink
        node.name = "combine_sink_4_0_desk"
        node.description = "Pink Room Audio - Desk Surround"
        combine.latency-compensate = false
        combine.props = {
            audio.position = [ FL FR RL RR ]
        }
        # stream.props = {
        #         stream.dont-remix = true      # link matching channels without remixing
        # }
        stream.rules = [
            {   matches = [
                    {   media.class = "Audio/Sink"
                        node.name = "alsa_output.usb-IK_Multimedia_iRig_PRO_DUO-00.analog-stereo"
                    } ]
                actions = { create-stream = {
                        combine.audio.position = [ FL FR ]
                        audio.position = [ FL FR ]
                } } }
            {   matches = [
                    {   media.class = "Audio/Sink"
                        node.name = "alsa_output.usb-Focusrite_Scarlett_4i4_USB_D8RMNFG131AA25-00.analog-surround-40"
                    } ]
                actions = { create-stream = {
                        combine.audio.position = [ RR RL ]
                        audio.position = [ FL FR ]
                } } }
        ]
    }
}
{   name = libpipewire-module-combine-stream
    args = {
        combine.mode = sink
        node.name = "combine_sink_4_0_desk_stereo"
        node.description = "Pink Room Audio - Desk Stereo"
        combine.latency-compensate = false
        combine.props = {
            audio.position = [ FL FR ]
        }
        # stream.props = {
        #         stream.dont-remix = true      # link matching channels without remixing
        # }
        stream.rules = [
            {   matches = [
                    {   media.class = "Audio/Sink"
                        node.name = "alsa_output.usb-Focusrite_Scarlett_4i4_USB_D8RMNFG131AA25-00.analog-surround-40"
                    } ]
                actions = { create-stream = {
                        combine.audio.position = [ FR FL ]
                        audio.position = [ FL FR ]
                } } }
            {   matches = [
                    {   media.class = "Audio/Sink"
                        node.name = "alsa_output.usb-IK_Multimedia_iRig_PRO_DUO-00.analog-stereo"
                    } ]
                actions = { create-stream = {
                        combine.audio.position = [ FL FR ]
                        audio.position = [ FL FR ]
                } } }
        ]
    }
}
{   name = libpipewire-module-combine-stream
    args = {
        combine.mode = sink
        node.name = "combine_sink_4_0_bench"
        node.description = "Pink Room Audio - Bench Surround"
        combine.latency-compensate = false
        combine.props = {
            audio.position = [ FL FR RL RR ]
        }
        # stream.props = {
        #         stream.dont-remix = true      # link matching channels without remixing
        # }
        stream.rules = [
            {   matches = [
                    {   media.class = "Audio/Sink"
                        node.name = "alsa_output.usb-IK_Multimedia_iRig_PRO_DUO-00.analog-stereo"
                    } ]
                actions = { create-stream = {
                        combine.audio.position = [ RR RL ]
                        audio.position = [ FL FR ]
                } } }
            {   matches = [
                    {   media.class = "Audio/Sink"
                        node.name = "alsa_output.usb-Focusrite_Scarlett_4i4_USB_D8RMNFG131AA25-00.analog-surround-40"
                    } ]
                actions = { create-stream = {
                        combine.audio.position = [ FL FR ]
                        audio.position = [ FL FR ]
                } } }
        ]
    }
}
{   name = libpipewire-module-combine-stream
    args = {
        combine.mode = sink
        node.name = "combine_sink_4_0_bench_stereo"
        node.description = "Pink Room Audio - Bench Stereo"
        combine.latency-compensate = false
        combine.props = {
            audio.position = [ FL FR ]
        }
        # stream.props = {
        #         stream.dont-remix = true      # link matching channels without remixing
        # }
        stream.rules = [
            {   matches = [
                    {   media.class = "Audio/Sink"
                        node.name = "alsa_output.usb-Focusrite_Scarlett_4i4_USB_D8RMNFG131AA25-00.analog-surround-40"
                    } ]
                actions = { create-stream = {
                        combine.audio.position = [ FL FR ]
                        audio.position = [ FL FR ]
                } } }
            {   matches = [
                    {   media.class = "Audio/Sink"
                        node.name = "alsa_output.usb-IK_Multimedia_iRig_PRO_DUO-00.analog-stereo"
                    } ]
                actions = { create-stream = {
                        combine.audio.position = [ FR FL ]
                        audio.position = [ FL FR ]
                } } }
        ]
    }
}
]