Product/Service

AD3000 Audio Delay/Synchronizer

Source: Pixel Instruments Corporation
The AD3000 is a low cost audio delay for lip sync correction and other applications where audio signals need to be delayed, transcoded or rate converted.
The AD3000 is a low cost audio delay for lip sync correction and other applications where audio signals need to be delayed, transcoded or rate converted. The AD3000D has AES/EBU (balanced) and SMPTE (unbalanced) digital inputs and outputs in addition to stereo analog inputs and outputs. 20 bit linear PCM with 64x oversampling on the input, and 8x oversampling on the output results in exceptional performance specifications. The AD3000D is perfectly suited to systems that are all digital, systems that are all analog and analog-to-digital/digital-to-analog conversion in hybrid installations.

When used for automatic lip sync correction with compatible video frame synchronizers, the AD3000's delay tracks the changing video delay using a TTL control pulse from the video synchronizer. The delay in the video can also be measured directly by the Pixel Instruments DD3100 which then "steers" the AD3000. A fixed offset delay can also be added to the varying delay. The AD3000 has the industries fastest rate of delay change, at a controlled rate of up to 5% with the built-in pitch shifter minimizing audible pitch artifacts. For installations that need to process two or more AES/EBU audio pairs, AD3000 can be operated in parallel with excellent tracking.

The digital input can receive any sample rate from 25 kHz to 48 kHz, and the output sample rate can be selected from 32 kHz, 44.056 kHz, 44.1 kHz, or 48 kHz. The input and output sample rates can be independent. The sample rate for the optional analog inputs is 48 kHz with 64x oversampling on the input and 8x oversampling on the output.

The output sample rate can be derived from an internal crystal oscillator, or can be frequency locked to an external video reference (NTSC or PAL) for installations where it is important to synchronize the audio and video sample rates to a common reference. If the input sample rate is 32 kHz, 44.056 kHz, 44.1 kHz, or 48 kHz, the output sample rate can instead be frequency locked to the digital input signal while still maintaining independent rates for the input and output. In automatic mode, with a 32 kHz, 44.056 kHz, 44.1 kHz, or 48 kHz input, the output sample rate is the same as the input rate.

The front panel of the AD3000 includes an LCD mode/status display for quick intuitive operator control, dual bargraph audio level display, and gain trim controls for the analog input and output. The RS232 control option allows remote control of AD3000 functions via a dedicated remote control panel, or via Windows software running on a PC.

Features

  • Delay range of up to 2.048 seconds
  • Reference quality A/D and D/A conversion
  • Automatic lip sync correction with compatible video processors
  • Fastest artifact free delay change in the industry
  • Automatic pitch correction during delay changes
  • Digital audio rate conversion
  • AES/EBU digital input and output (XLR connectors)
  • SMPTE (unbalanced) digital input and output (BNC connectors)
  • Stereo analog input and output (XLR connectors)
  • Power down bypass
  • Studio Master option adds up to 25% pitch shift, time compression and expansion, extended delay of up to 6 seconds
  • Optional remote control

Pixel Instruments Corporation, 110 Knowles Drive, Los Gatos, CA 95032. Tel: 408-871-1975; Fax: 408-871-1976.