lip sync error problem solved, felston digital audio delay

DD540 digital audio delay for lip sync error
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DD540 brochure Click here for the DD540 brochure
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DD540 Dual-Source Digital Audio Delay
affordable solution to lip sync error for up to two sources

We have consolidated our product line, replacing the DD540 with the 4-input DD740. Since the DD540 is occasionally available from past customers interested in upgrading to the DD740, we have included the information below for customers considering a pre-owned DD540.


DD540 digital audio delay for lip sync error

If you own an A/V amplifier, the DD540 gives you the power you need to keep lip sync error at bay

"brilliantly simple"

AV Review

This and more reviews here

Got a source (receiver box/VCR etc.) with only stereo (analog) audio output? The DD540 can connect to that too. Click here for info

  • Dual digital audio inputs and outputs (optical and coax)
  • Remote control
  • 680ms maximum delay (340ms for 96kHz signals)
  • Automatic input switching, with input's last delay restored
  • Can convert optical-to-coax/coax-to-optical, for connecting 2 sources to an amplifier with a single input
  • 12 user-programmable presets (6 per input)
  • Adjustable display brightness
  • Discrete IR commands for integration with learning remotes
  • No effect on audio quality thanks to bit-perfect reproduction

Click here for where to buy

Remote control for digital audio delay
Digital audio delay's connections