If
you connected external speakers to the projector, you can connect
your video source to the projector with an audio cable to play
sound.
Note: If you
connected your video source to the projector's SDI port (Pro L1490U/L1490UNL/L1495U/L1495UNL/L1500UH/L1500UHNL/L1505UH/L1505UHNL/L1750UNL/L1755UNL),
audio output is not supported.
Note: If you
connected your video source to the projector using an HDMI cable,
the audio signal is transferred with the video signal; you do not
need an additional cable for sound. If you have problems hearing
audio through the HDMI connection, you can play sound through an
audio cable instead by following the steps described
here.