Hall Research Universal Audio Delay Processor
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Hall Research Universal Audio Delay Processor

SKU: HRAD340 MFR: AD-340
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$375.16
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Key Features

  • Achieve perfect audio sync with this universal audio delay processor; eliminate distracting echoes.
  • Fine-tune your sound with adjustable audio delay; supports both digital and analog audio formats.
  • Enjoy pristine sound quality; this audio processor features a wide frequency response (+/- 0.2 dB).
  • Easily sync audio for live streams; supports Dolby Digital 5.1 & DTS 5.1 compressed bitstreams.
  • Use the AD-340 for post-production; delay settings offer precise 1ms resolution adjustments.
  • This audio delay box features a compact design; fits seamlessly into any audio-visual setup.
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Special Order?Estimated to Ship: 08/22/2025
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Hall Research Delay Processor Specifications

  • Analog Audio: Standards

    Stereo (Left and Right Channel)

  • Analog Audio: Signal Level

    Line Level - 2 Vrms (5.6 Vpeak-to-peak)

  • Analog Audio: Sampling Rate

    Selectable: 32 kHz or 48 kHz

  • Analog Audio: Cable/Connectors

    Coaxial Cable with RCA Connector

  • Analog Audio: Frequency Response

    (20 Hz - 20 kHz) +/- 0.2 dB at 44.1 kHz or higher sampling rate

  • Analog Audio: ADC Gain

    +/- 24 dB - step value 1 dB (ADC Dynamic Range: 100 dB)

  • Analog Audio: DAC Gain S/(N+D)

    +/- 6 dB - step value 1 dB (DAC Dynamic Range: 106 dB); 90 dB (signal-to-noise and distortion ratio)

  • Digital Audio: Standards

    IEC 60958 Type II - Sony/Philips Interconnect Format=S/PDIF

  • Digital Audio: Audio Formats

    Linear PCM (stereo), Compressed Digital Bitstreams: Dolby Digital 5.1, DTS 5.1 (16, 20 & 24 bit)

  • Digital Audio: Cable/Connectors

    Coaxial Cable with RCA Connector - 75 Ohm

  • Digital Audio: Signal Level

    0.5 to 0.6 Vpeak-to-peak (transformer coupled output)

  • Digital Audio: PLL Lock Frequency

    32 to 196 kHz

  • Digital Audio: Sampling Rate

    32 kHz, 44.1 kHz, 48 kHz, 96 kHz

  • Digital Audio: PCM Bitrates

    32 kHz - 2 MHz, 44.1 kHz - 2.8 MHz, 48 kHz - 3.1 MHz, 96 kHz - 6 MHz

  • Digital Audio: Bitstream Bitrates

    DTS: 1.5 Mbps - Dolby Digital- DVD: 448 kbps - Dolby Digital-BD: 640 kbps

  • Delay Settings: Maximum Delay Time Msec

    32 kHz: 510 ms
    44.1 kHz: 370 ms
    48 kHz: 340 ms
    96 kHz: 85 ms

  • Delay Settings: Maximum Frames

    16 video frames at both 50 Hz and 60 Hz

  • Delay Settings: Resolution

    1 msec, 1 Frame, 1 Foot, 1 Meter (for Delay Values)

  • Delay Settings: Compensation Temp Range

    32 to 122 deg. F / 0 to 50 deg. C; Step Value: 1 deg. F / -17 deg. C

  • Power Requirement

    6 to 9 v DC at 500 Madc
    6 vDC 1.5 ADC Universal Power Supply (100-240 VAC) included

  • Temperature/humidity Storage

    -40 to 70 deg. C / -40 to 158 deg. F; 10% to 90%, non-condensing
    Operating: 0 to 40 deg. C / 32 to 104 deg. F; 10% to 90%, non-condensing

  • Cooling

    Convection

  • Enclosure type

    Metal

  • Vibration

    ISTA 1A in carton (International Safe Transit Association)

  • Safety

    CE

  • EMI/EMC

    CE, FCC Class A

  • MTBF

    90,000 hours

  • Dimensions (H x W x D)

    1.18 x 4.17 x 3.85" / 3.00 x 10.59 x 9.78cm (Depth excludes connectors)

  • Weight

    0.75lbs / 0.34kg

  • UPC Code

    724696529804

Models
Hall Research Universal Audio Delay Processor

Hall Research Universal Audio Delay Processor

SKU: HRAD340

MFR: AD-340

$375.16

Special Order

Generally ships in 7-14 days, subject to availability

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SKU: SESAVSYNC

MFR: SES-A-V-SYNC

$99.95

Special Order

Generally ships in 7-14 days, subject to availability

RDL RU-ADL2 Professional Audio Delay Controller

RDL RU-ADL2 Professional Audio Delay Controller

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MFR: RU-ADL2

$686.58

Special Order

Generally ships in 7-14 days, subject to availability

Compatibility-DSLR & Video RigsStudio
Accessory TypeAudio Delay BoxAudio Delay BoxAudio Delay Box

About Hall Research Delay Processor

The AD-340 is an audio delay processor with universal analog (L/R) and digital (SPDIF) inputs and outputs. Both outputs are simultaneously active, enabling conversion between analog stereo audio to LPCM or vice versa. Delay time can be specified in milliseconds, frames or distance depending on the application. Analog inputs provide +/- 24 db of gain for direct connection of low level mic as well as handling 2vrms line-level signals. The AD-340's digital I/O support 2-channel linear PCM, 5.1 Channel Dolby Digital and DTS Surround encoded bitstreams at any sampling rate from 32KHz to 96KHz.

For advanced control, the AD-340 connects to a PC via USB (cable included). No special USB drivers are needed and Hall Research provides a free software configuration utility available for download below. Advanced settings include:

• Selection of Sample Rate for Analog input
• Display of Sample Rate and Audio Format (LPCM, Dolby, DTS, DTS-CD)
• Adjustment for: mSec, Feet, Meters, Frames (both 50 and 60 Hz)
• Temperature compensation of delay needed for a given distance
• SPDIF input phase lock and integrity indication
• Choice for Auto-mute of Analog output when changes are being made
• Gain control of analog input and outputs
• Power status display and control (On / Standby)
• Ability to connect and control multiple devices from one PC (with user specified names stored in each)
• Front Panel Lock control so adjustments cannot be changed inadvertently

Hall Research Delay Processor Features

  • Delay analog or digital audio in milliseconds, frames, or distance
  • Analog to Digital and Digital to Analog conversion
  • Supports CD, DVD and Blu-Ray sample rates at 32kHz, 44.1kHz, 48 kHz and 96kHz
  • Supports 2-channel linear PCM digital audio and 5.1 Channel Dolby Digital and DTS encoded bitstreams
  • Delay up to 510 ms
  • Delay calculation based on distance with optional automatic temperature compensation
  • Stereo Analog RCA inputs are ground loop isolated to prevent spurious buzz or hum
  • USB interface for advanced control

Warranty Information

This product has a limited warranty of 24 months.

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Key Features

  • Achieve perfect audio sync with this universal audio delay processor; eliminate distracting echoes.
  • Fine-tune your sound with adjustable audio delay; supports both digital and analog audio formats.
  • Enjoy pristine sound quality; this audio processor features a wide frequency response (+/- 0.2 dB).
  • Easily sync audio for live streams; supports Dolby Digital 5.1 & DTS 5.1 compressed bitstreams.
  • Use the AD-340 for post-production; delay settings offer precise 1ms resolution adjustments.
  • This audio delay box features a compact design; fits seamlessly into any audio-visual setup.

What's in the box:

  • Hall Research Universal Audio Delay Processor
  • Universal Power Supply (6V DC at 1.5A) with Interchangeable Connector Blades
  • USB Cable with Mini-B Connector
  • User's Manual
  • Hall Research 2 Year Limited Warranty