Yamaha MY4-AEC Owner's Manual
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Yamaha MY4-AEC Owner's Manual

Yamaha MY4-AEC Owner's Manual

Acoustic echo canceller card
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ACOUSTIC ECHO CANCELLER CARD
ACOUSTIC ECHO CANCELLER CARD
MY 4 - AEC
MY 4 - AEC
Owner's Manual
Bedienungsanleitung
Mode d'emploi
Manual de instrucciones
Manuale di istruzioni
Руководство пользователя
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Summary of Contents for Yamaha MY4-AEC

  • Page 1 ACOUSTIC ECHO CANCELLER CARD ACOUSTIC ECHO CANCELLER CARD MY 4 - AEC MY 4 - AEC Owner’s Manual Bedienungsanleitung Mode d’emploi Manual de instrucciones Manuale di istruzioni Руководство пользователя 取 扱説 明 書...

  • Page 2: Fcc Information (U.s.a.)

    Compliance with FCC * This applies only to products distributed by YAMAHA CORPORATION OF AMERICA. (class B) CANADA This Class B digital apparatus complies with Canadian ICES-003.
  • Page 3 • Do not drop the card or subject it to physical shock as this • Do not install the card in any Yamaha products not can result in breakage and/or malfunction. specified by Yamaha for use with the card to avoid possible •...

  • Page 4: Information For Users On Collection And Disposal Of Old Equipment

    This symbol is only valid in the European Union. If you wish to discard these items, please contact your local authorities or dealer and ask for the correct method of disposal. European models Purchaser/User Information specified in EN55103-1 and EN55103-2. Conforms to Environments: E1, E2, E3 and E4 MY4-AEC Owner’s Manual...

  • Page 5: Installation

    Introduction Thank you for choosing the Yamaha MY4-AEC. The MY4-AEC is an acoustic echo canceller card designed for use with the DME64N/24N Digital Mixing Engines that can effectively reduce troublesome acoustic echoes due to secondary pickup of speaker output and reflections from room surfaces in teleconferencing situations.

  • Page 6: Principle Of Operation

    Projectors and air conditioning systems also produce noise that can interfere with clear teleconferencing. The echo cancelling and noise reduction capabilities of the MY4-AEC help to achieve maximum clarity and intelligibility for smooth, effective communication.
  • Page 7 The local and remote locations in a teleconferencing system are referred to as the “near end” and “far end”, respectively. The MY4-AEC acoustic echo canceller (AEC) works by comparing the reference signal received from the far-end with the signal from the microphone in order to determine which components of the signal are echo, and then subtracts only the far-end echo component from microphone signal.
  • Page 8 These connectors support four channels of AES/EBU format digital audio input and output to and from the host DME64N/24N unit, but those signals are not directly routed via the MY4-AEC processing section. Signals from the host’s analog or digital inputs must be routed to the MY4- AEC card’s AEC processing section via the host’s processing section in order to apply echo...
  • Page 9 DME Processing DME64N/24N Processing MY4-AEC Analog Out Mic In AES/EBU AES/EBU [OUT1/2][OUT3/4] [IN1/2][IN3/4] MY4-AEC Owner’s Manual...

  • Page 10: Cable Preparation

    7 mm sleeves. Use a ferrule whose conductor portion has an external diameter of 1.6 mm or less, and a length of approximately 7 mm (such as the AI0,5-6WH made by the Phoenix Contact corporation). MY4-AEC Owner’s Manual...
  • Page 11 – Euroblock Plug Securely tighten terminal screws. Pull the cables (not too strongly) to confirm that they are securely NOTE connected. A slotted screwdriver with a blade width of about 3 millimeters is recommended. 3mm or less MY4-AEC Owner’s Manual...
  • Page 12 Bundle the cables and the Insert the Euroblock plug into Euroblock tab using the the AES/EBU [IN] or [OUT] supplied cable tie. connector of the MY4-AEC. NOTE Trim any excess part of the cable tie as necessary. MY4-AEC Owner’s Manual...
  • Page 13 The AEC system will have the best possible effect if these initial steps are carried out properly. Prepare the following equipment.  DME24N x 1  MY4-AEC x 1  Microphones x 4  Speakers x 2 NOTE Be sure to choose microphones and speakers that have good frequency response characteristics in order to ensure optimum AEC operation.
  • Page 14 • Place an oscillator that will be used for AEC adjustment in the configuration window and connect it to the AEC component “From Far-end A” input. • The “Far-end voice A” output is connected to the conference room speakers (SP 1 and SP 2) in parallel. MY4-AEC Owner’s Manual...
  • Page 15 Adjust the DME24N HA Gain while watching the “Mic. In” meters in the AEC component editor so that the yellow segment lights only occasionally. NOTE AEC may not function properly if the gain is set too high. MY4-AEC Owner’s Manual...
  • Page 16 Open the Oscillator component editor, set the Wave Form type to “Pink,” and engage the Output section “On” button. Go back to the AEC component editor and, while watching the “Ref. In” meter, adjust the oscillator output level so that the yellow segment lights only occasionally. MY4-AEC Owner’s Manual...
  • Page 17 If multiple speakers are used, enter the distance between the microphone and nearest speaker for each channel. If the distance is less than 2 meters, use the default value of “2”. For greater distances enter the appropriate value. MY4-AEC Owner’s Manual...
  • Page 18 Four microphones can be connected at the near-end location, allowing multiple conference participants. Meeting Room (Near End) Speaker 1 Microphone 1 Speaker 2 Office X (Remote – Microphone 2 Far End) (Analog) Microphone 3 DME24N MY4-AEC Microphone 4 IN (Analog) IN/OUT (Analog) Network Teleconferencing system MY4-AEC Owner’s Manual...
  • Page 19 “To Office X” for transmission to the remote location. HINT When multiple speakers are being used in the local meeting room, be sure to connect the mixed signal to them in parallel. AEC may not function properly if the output balance between the speakers changes. MY4-AEC Owner’s Manual...
  • Page 20 Other parameters can usually be left at their default settings. Refer to the DME Designer owner’s manual for details on the individual AEC component parameters. MY4-AEC Owner’s Manual...
  • Page 21 Example 2: Teleconferencing with Two Remote Locations from Two Meeting Rooms Using one MY4-AEC card, multiple participants in two meeting rooms can teleconference with two separate remote locations (“Office X” and “Office Y”). Preparation Referring to Example 1, use an oscillator component to determine the ideal microphone and speaker positions for each meeting room.
  • Page 22 OUT (Analog) Network IN/OUT (Analog) IN (Analog) DME24N MY4-AEC IN/OUT IN (Analog) (Analog) Network Microphone 1 OUT (Analog) Speaker 1 Microphone 2 Teleconferencing Office Y system (Remote – Far End) Speaker 2 Medium Meeting Room (Near End) MY4-AEC Owner’s Manual...
  • Page 23 “To Office Y” for transmission to remote Office Y. HINT When multiple speakers are being used in the same meeting room, be sure to connect the mixed signal to them in parallel. AEC may not function properly if the output balance between the speakers changes. MY4-AEC Owner’s Manual...
  • Page 24 Office X (Far-end A) using AEC channels 1 and 2, and between the medium meeting room and Office Y (Far-end B) using AEC channels 3 and 4. From Far-end A From Far-end B MY4-AEC Owner’s Manual...

  • Page 25: General Specifications

    Temperature Range Operating 0 to +40°C Storage -20 to +60°C Weight 160g  DIGITAL INPUT/OUTPUT CHARACTERISTICS Terminal Format Audio Data Length Level Connector 1/2, 3/4 AES/EBU 24bit RS422 Euroblock OUT 1/2, 3/4 AES/EBU 24bit RS422 Euroblock (Professional use) MY4-AEC Owner’s Manual...
  • Page 26 Dimensions 164.1 176.1 unit: mm MY4-AEC Owner’s Manual...
  • Page 27 * Le contenu de ce mode d’emploi s’applique aux dernières caractéristiques techniques connues à la date de publication du manuel. Pour obtenir la version la plus récente du manuel, accédez au site Web de Yamaha puis téléchargez le fichier du manuel concerné.
  • Page 28 Memo MY4-AEC Owner’s Manual...
  • Page 29 Memo MY4-AEC Owner’s Manual...
  • Page 30 MY4-AEC Owner’s Manual...
  • Page 31 MY4-AEC Owner’s Manual...

  • Page 32: Address List

    Yamaha Music Europe GmbH, LIECHTENSTEIN Branch Italy MEXICO Yamaha Music Europe GmbH, Viale Italia 88, 20020, Lainate (Milano), Yamaha de México, S.A. de C.V. Rellingen, Branch Switzerland in Italy Av. Insurgentes Sur 1647 Piso 9, Col. San Zürich Tel: +39-02-93577-1 José...
  • Page 33 Jebel Ali FZE, Dubai, UAE 2F., No.1, Yuandong Rd. Banqiao Dist. Tel: +971-4-801-1500 New Taipei City 22063, Taiwan, R.O.C. Tel: +886-2-7741-8888 HEAD OFFICE Yamaha Corporation, Audio Products Sales and Marketing Division PA42 10-1, Nakazawa-cho, Naka-ku, Hamamatsu, Japan 430-8650 MY4-AEC Owner’s Manual...
  • Page 34 上海市静安区新闸路 1818 号云和大厦 2 楼 客户服务热线： 4000517700 公司网址： http://www.yamaha.com.cn 制造商：雅马哈株式会社 制造商地址：日本静冈县滨松市中区中泽町 10-1 进口商：雅马哈乐器音响（中国）投资有限公司 进口商地址：上海市静安区新闸路 1818 号云和大厦 2 楼 原产地：日本 Yamaha Pro Audio global website http://www.yamahaproaudio.com/ Yamaha Downloads http://download.yamaha.com/ Manual Development Department © 2011 Yamaha Corporation Published 02/2016 改版 MWTO-C0 Printed in Japan...

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