endpoint AudioServer
{
    // Basic protocol
    Greet(i32 client_pid) => (i32 server_pid, i32 client_id)

    // Mixer functions
    GetMainMixVolume() => (i32 volume)
    SetMainMixVolume(i32 volume) => ()

    // Buffer playback
    EnqueueBuffer(i32 buffer_id) => (bool success)
}