User’s Manual Model AD-340 Universal Audio Delay Processor CUSTOMER SUPPORT INFORMATION Order toll-free in the U.S. 800-959-6439 FREE technical support, Call 714-641-6607 or fax 714-641-6698 Address: Hall Research, 1163 Warner Ave. Tustin, CA 92780 Web site: www.hallresearch.com E-mail: info@hallresearch.
Universal Audio Delay Processor Contents 1 Introduction ..................................................................................... 2 1.1 General ........................................................................................................ 2 1.2 Features....................................................................................................... 3 2 Installation ....................................................................................... 4 2.1 Package Contents ...
Model AD-340 1 Introduction 1.1 General Thank you for purchasing the professional and compact AD-340 Audio Delay Processor from Hall Research. This User’s Manual applies to both the AD-340 Audio Delay Hardware and the Windows-based Audio Delay Software Graphical User Interface (GUI). The AD-340 can be configured directly from the Front Panel Push Buttons or from the GUI when the AD-340 is connected to a Windows HOST PC with a USB cable.
Universal Audio Delay Processor 1.2 Features • Stereo Analog Input and Outputs (left and right channel) – RCA connectors • Analog Audio Compatible with 2 Vrms Line level for CD, DVD and BD Players • Digital Audio Input and Outputs - SPDIF over coaxial - for RCA connector • Digital Audio (IEC60958) supporting standard CD, DVD and BD sample rates at 32 kHz, 44.1 kHz, 48 kHz and 96 kHz • Supports 2-channel linear PCM digital audio and 5.1 Channel Dolby Digital and DTS encoded bitstreams.
Model AD-340 2 Installation 2.1 Package Contents Your package should contain the AD-304 Audio Delay Processor, a Universal power supply (6v DC @ 1.5A) with interchangeable connector blades for most countries, a USB Cable with Mini-B Connector and this User’s Manual. Notice The unit can run from 6 to 9v DC power (center positive), current requirement is 200 ma max. Use of any other voltage may cause damage to the unit and void the warranty. 2.
Universal Audio Delay Processor REAR PANEL: 11. 12. 13. 14. 15. 16. 17. Power Connector: Connects to 6V Power Supply SPDIF RCA Input: Digital Audio Input Left RCA Input: Left Analog Audio Input Right RCA Input: Right Analog Audio Input SPDIF RCA Output: Digital Audio Output Left RCA Output: Left Analog Audio Output Right RCA Output: Right Analog Audio Output 2.
Model AD-340 3 Configuration & Operation 3.
Universal Audio Delay Processor 3.2 Windows-Based Software GUI The AD-340 Programmer is a software-based solution capable of configuring any setting on one or more AD-340 devices connected to the Windows PC via a valid USB connection. 3.2.1 Installation A compatible PC with Windows XP™ or later operating system with a USB connection is required: • Microsoft™ .NET Framework 2.0 or later • If .NET Framework 2.0 or later is not installed on your PC, the Microsoft™ website has freely available downloads.
Model AD-340 3.2.2 Operation For most installations, the AD-340 can be configured fully from the Front Panel Push Buttons. If needed, the GUI software has full access to all the capabilities of the Audio Delay system that are not available from the device front panel controls. The table below summarizes the control differences between the device controls and the software.
Universal Audio Delay Processor Tool Bar Menu: Restore Restore device settings from a file. User is allowed to select any previously saved file from any location on user’s computer. Invalid files are ignored. Save Save device settings to a file. User is allowed to select any location to save the file to any location on the user’s computer. Tools Factory Defaults: Restores the unit to the factory default settings (except for the DEVICE NAME). The user must confirm the action.
Model AD-340 Input Selection Analog: Select for Analog Audio Inputs. (E.g. from a PC Audio Output) Digital: Select for Digital Audio Inputs. (E.g. from a SPDIF Audio Output) Sampling Rate Analog: Adjustable to 32 kHz or 48 kHz. Digital: Actual Bitstream type and sampling rate displayed. User changes not allowed. The BitStream input type displayed underneath the indicators for DOLBY and DTS.
Universal Audio Delay Processor Miscellaneous DOut Mute: If selected, the digital audio output is muted. AOut Mute: If selected, the analog audio output is muted. When the Audio Input type is set for Digital, the analog output is automatically muted when the incoming BitStream is DTS or Dolby Digital. If the Digital BitStream is Linear PCM, then the analog output is enabled and can be muted if desired. Auto Mute: If selected, the audio output will mute briefly when any audio settings are adjusted.
Model AD-340 3.3 Audio Configuration 3.3.1 General Select AUDIO INPUT TYPE either with the SELECT button on the Front Panel or on the GUI. In ANALOG MODE, there are two user selectable sampling rates. The recommended value is 48 kHz for good audio quality, but 32 kHz is available for increased delay time. The SPDIF Digital Input supports the common sampling rates used by CD, DVD, DAT and Blu-Ray Disc (BD) Players: 32 kHz, 44.1 kHz, 48 kHz and 96 kHz.
Universal Audio Delay Processor The AD-340 Auto Detects the Sampling Rates for Digital Input o o o o o 32 kHz (DSR, PC-Audio) 44.
Model AD-340 3.3.4 Analog Input/Output Volume Control The analog input and output is set to Line Levels for CD, DVD and BD Players at 2 Vrms (5.6 V-peak-to-peak), so if any of these sources are used the volume control should be set to Unity Audio Gain (Default). However if the source is a weaker signal – like a MICROPHONE input connected with RCA adapter – an adjustable Gain Control allows the user to manually control both the gain of the analog input (ADC Gain) and the analog (DAC Gain) output.
Universal Audio Delay Processor External (Acoustic) Delay: The need to adjust for external delay becomes an issue when the listener gets the same sound from different sources (speaker sets) that are placed at different distances to the listener. The bigger the relative distance between the speaker sets the more annoying. External delay is caused by the speed of sound; because the sound from speaker systems located at different distances arrive at different times.
Model AD-340 In calculation of delay needed for given distance the unit includes correction needed for Haas effect. This correction masks localization of delayed audio source, so the listener still perceives the sound coming from far source. The maximum number of milliseconds of delay possible is a function of the audio sampling rate as shown in the table below: Sampling Rate 32 kHz 44.
Universal Audio Delay Processor 3.3.6 Factory Default Settings Analog Input – Sampling Rate: 48 kHz Delay Type: Millisecond – 0 msec Temperature: Nominal at 72° Fahrenheit and 23 °Celsius DOUT and AOUT mute off AUTO-MUTE on Audio Gain –Unity: ADC = 0 dB and DAC = 0 dB Front Panel = unlocked 4 Troubleshooting 4.1 FAQ The analog sound is distorted. The AD-340 is designed with Nominal Line Level for CD, DVD and BD Player, set at 2 Vrms (or 5.6 Vpeak-to-peak).
Model AD-340 What is “AUTO-MUTE”? It is recommended to leave the “AUTO-MUTE” turned on in the GUI. The Auto-Mute will automatically mute the outputs when audio settings adjustments are made. If unchecked, you could hear undesirable transitional sounds when the audio settings are being changed. The Front Panel is locked completely – How can I get it back to an unlocked state? The Front Panel must be unlocked from the GUI “Front Panel Lock” checkbox. I can only change temperature when in FEET or METER mode.
Universal Audio Delay Processor 5 Specifications Analog Audio: Standards Signal Level Sampling Rate Cable/Connectors Frequency Response ADC Gain DAC Gain S/(N+D) Digital Audio: Standards Audio Formats Cable/Connectors Signal Level PLL Lock Frequency Sampling Rate Data Bitrates PCM Data Bitrates Encoded Bitstreams Delay Settings: Maximum Delay Time Msec Maximum Frames Maximum Feet @ 72 °F Maximum Meters @ 23° C Resolution for Delay Values Fahrenheit Range Celsius Range Calculation Accuracies Other: Power R
© Copyright 2013. Hall Research, Inc. All rights reserved. CUSTOMER SUPPORT INFORMATION Order toll-free in the U.S. 800-959-6439 FREE technical support, Call 714-641-6607 or fax 714-641-6698 Mail order: Hall Research, 1163 Warner Ave. Tustin, CA 92780 Web site: www.hallresearch.com E-mail: info@hallresearch.
