User manual BIAMP VOICECRAFTER AND VOICECRAFTER PLUS

[. . . ] VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUS is a DSP based device and is easily programmed via Windows® 95/98/NT software. VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUSS' long tail length and fast convergence time allow flawless adaptation to acoustic changes in a room, without the necessity of continual training. A second model, VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUS Plus, includes a 2-wire (POTS) card for teleconferencing applications. The VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUS and the VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUS Plus are both covered by a 5-year warranty. [. . . ] The VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUS will attempt to train, wait for train cycle to complete before continuing (send and receive LED's will blink 2 or more times then stop). Connect the provided serial cable to the VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUS and the computer. Click on File, then Connect to retrieve the VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUS's settings. Click on Fully Disabled in the AutoAdaptation section. Channel 2 of the VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUS must be configured for a line level input. Click on Mode under Channel 2; use the pull-down menu to select Line Input (Balanced or Unbalanced depending on mixer used). Adjust the Input level and trim controls of the mic mixer so that proper gain structure and levels are established in the mixer (the peak LED is occasionally lit during speech, if output metering is available activity will be detected). Enable the internal white noise generator, click on the Noise box in the Main Output section (enabled is checked, disabled is unchecked, white noise sounds like hiss). The Receive LED on the VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUS will be green when white noise is being generated. Set the Main Output Level (via the Pull-down menu) for 0dB. Adjust the amplifier level so that 72dB (`A' weighted setting) of sound pressure is measured approximately 3 Inches (7. 5 cm) in front of the microphone. If white noise decreases during train, decrease AERL target by 2dB. Retrain the VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUS after any AERL target changes Hint: For most rooms the ERLE should be 8dB or greater. In some less reverberant rooms a lower ERLE may be acceptable. A low ERLE in a highly reflective room means that the echo canceller may not be able to adapt quickly to changes in the room. In a more absorptive room the echo canceller may not need to work as hard, and therefore the ERLE can be a lower value without any adverse effect on the echo cancellers performance. 2. 3. 5. 8. 10 SETUP PROCEDURES Using an external microphone mixer with local sound reinforcement. Connect the mix-minus output of the mixer (containing only local speech) to the Channel 2 input of the VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUS. Connect the Main Output of the VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUS to an input of the mixer (this signal should only be routed to the amplifier and NOT fed back in to the Channel 2 input of the VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUS. ) Connect the output of the mixer containing all audio signals to the amplifier. Connect the Main Output of the VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUS to the input of the amplifier. The output of the external mixer should be connected to Channel 2 of the VOICECRAFTER AND VOICECRAFTER PLUS AND VOICECRAFTER AND VOICECRAFTER PLUS PLUS. 2-conductor shielded cable should be used for all connections. [. . . ] To be certain of the number of devices that may be connected to the line, as determined by the total RENs, contact the telephone company to determine the maximum REN for the calling area. This equipment cannot be used on the telephone company-provided coin service. Connection to Party Line Service is subject to State Tariffs. If this equipment causes harm to the telephone network, the telephone company will notify you in advance that temporary discontinuance of service may be required. [. . . ]