Yamaha introduces acoustic echo cancellation card for DME series

Given the popularity of DME systems in facilities such as conference centers and meeting rooms, where complex, high-quality processing and routing is required, Yamaha has opted for the development of a dedicated processor that eliminates the annoying echo problem.

Yamaha now expands the potential of the DME series with the launch of the MY4-AEC echo cancellation card, bringing flexibility and high-definition sound to the video and audio conferencing markets.

La serie Yamaha DME de sistemas de mezclas digitales cuenta con una excelente reputación en muchos mercados, incluidos teatros, medios de difusión, instalaciones comerciales y eventos en directo, gracias a sus flexibles funciones de E/S y de procesamiento DSP.

Los sistemas de conferencias remotas hacen posible una considerable reducción de los costes y el tiempo que se invierte en viajes, lo que contribuye a la aplicación de políticas respetuosas con el medio ambiente y mejora la productividad. Con la introducción del vídeo de alta definición (HD) en esta área, los sistemas DME de Yamaha están adquiriendo mayor popularidad como medio de mejorar la calidad del audio de las conferencias.

Echo cancellation cancels out the echo that occurs when sound from a speaker is picked up by a microphone in the same room. Given the popularity of DME systems in facilities such as conference centers and meeting rooms, where complex, high-quality processing and routing is required, Yamaha has received numerous requests for the development of a dedicated processor to address the issue of echo cancellation. The answer to these requests is the MY4-AEC card.

Perfect for use in large conference rooms and multi-location meetings, the card includes four adaptive echo cancellation (AEC) channels, which automatically calculate the best settings based on the environment and equipment being used. It also has a powerful noise reduction algorithm, which means that constant noises such as those produced by fans or air conditioners can be attenuated.

For large spaces where microphones are used with a PA system for voice amplification, the MY4-AEC's four-channel feedback suppression system employs 42 elimination filters per channel. Each channel also has width and depth parameters that can be adjusted to achieve an optimal level. Thanks to its extended delay time feature, the card can eliminate delays of up to 400 ms, ensuring clear sound even in very large rooms or long-distance conferences.

The MY4-AEC also has several additional features that further improve sound quality: Its sampling rate is 48 kHz, but it can also be used in 96 kHz systems by reducing the capacity from four to two channels. Meanwhile, the quality of remote conferencing over the Internet can be greatly improved thanks to the card's wide frequency range (20 Hz to 20 kHz), which ensures very natural-sounding conversations.

To facilitate the use of other digital equipment, the MY4-AEC has four AES/EBU I/O channels. The I/O ports include sample rate conversion, ensuring easy connection to equipment with different sample rates.

Finally, Yamaha's DME Designer software allows you to optimize the performance of all AEC parameters (DME Designer V4.0 and compatible hardware required).