• Posted by admin
• On September 1, 2011
• 0 Comments

1. Echo Digital Audio Sound Cards For Windows Xp
2. Echo Digital Audio Sound Cards For Pc

Clock Synchronization

Acoustic Echo Cancellation (AEC) is a method of removing the echo from the audio signal captured by the microphone. This is done by using the audio that is played to the speakers as a reference audio signal. Most AEC algorithms require that both audio signals, i.e. the signal captured from the microphone and the signal sent to the speakers, MUST be clock synchronized otherwise the AEC algorithm is unable to lock-on the echo path and perform echo cancellation.

When will the Acoustic Echo Cancellation fail?

Echo Digital Audio Corporation warrants this product, when purchased at an Authorized Echo Dealer in the United States of America, to be free of defects in materials and manufacturing workmanship for a period of one year from the date of original purchase. During the warranty period Echo shall, at its option, either.

Most AEC algorithms will fail if the signal captured form the microphone and the signal sent to the speakers are not 100% clock-synchronized. This can happen in many cases like:

• This is done by using the audio that is played to the speakers as a reference audio signal. Most AEC algorithms require that both audio signals, i.e. The signal captured from the microphone and the signal sent to the speakers, MUST be clock synchronized otherwise the AEC algorithm is unable to lock-on the echo path and perform echo cancellation.
• The Echo MIA MIDI Digital Audio and MIDI Card is an unbeatable price/performance solution for digital sound editing. A powerful music production interface that includes two - 1/4' TRS balanced inputs Show More.

• When the sound card that is being used is a low-end one that does not have a built-in clock mechanism to synchronize the input and output audio signals.
• When the VoIP application is configured to use different sounds card for input and for output. For example, a USB web-cam is used as the capture device while the laptop’s built-in speakers are being used for playback.

Conclusion

If your VoIP application needs to cancel echo in any of the above conditions, you should not use a standard echo cancellation. In such case you need to use a robust echo cancellation that is capable of working in volatile environments. SoliCall’s unique echo cancellation is a robust algorithm that is capable of working in such complex conditions.

Echo test hardware is used worldwide to verify audio quality for millions of devices every year. With over 25,000 units installed worldwide, there’s a good chance the device you are using to read this was tested with an Echo product.

AIO-S

2 amplified outputs
6 IEPE mic/line inputs
Impedance input

AIO-AC

2 amplified outputs
2 line outputs
4 IEPE mic/line inputs
8 GPIO pins
Auxiliary DC power supply
DC monitor

AIO-AT

2 amplified outputs
4 IEPE mic/line inputs
10 TDM outputs
10 TDM inputs

AIO-LT

2 line outputs
4 IEPE mic/line inputs
10 TDM outputs
10 TDM inputs

Echo Digital Audio Sound Cards For Windows Xp

Echo Digital Audio Sound Cards For Pc

Developed in Santa Barbara, California, Echo test systems have proven to deliver consistent, fast results in real-world applications. Our focus on build quality and audio quality enables our hardware to endure for years under the rigor of mass production. Echo’s pricing, reliability, and flexibility offer some of the most cost-effective and capable testing solutions available.