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Filename : 20-upmix.conf

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# Enables upmixing
stream.properties = {
    channelmix.upmix      = true
    channelmix.upmix-method = psd  # none, simple
    channelmix.lfe-cutoff = 150
    channelmix.fc-cutoff  = 12000
    channelmix.rear-delay = 12.0
}