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Fading
It is difficult for our ears to tell the
direction of low frequency sounds,
so when the locomotive is close to
the subwoofer it appears that all
the sounds are coming from the
locomotive. If the locomotive gets
too far from the subwoofer while still
transmitting, it becomes apparent to
the listener that the low frequency
sounds are not coming from the
locomotive. For this reason, once
the locomotive starts to get out of
transmission range, the subwoofer
sounds will begin to fade away.
Once the locomotive (or another
locomotive) gets close to the receiver
again, the low frequency sounds will
gradually fade in and begin playing
again.
On smaller layouts, this effect is kind
