Digigram to Showcase Advances Achieved with AT Corporation in Presentation at 5 S Convention

Date: 2013-10-15

Contact: marcom@digigram.com

GRENOBLE, France October 15th, 2013

Digigram today announced that the poster Automatic Analog Preamp Gain Control Using Digital Command has been selected for presentation at the 135th AES Convention in New York City on Oct. 19. This poster addresses the problem of designing an automatic gain control (AGC) in the absence of dedicated hardware, such as voltage-controlled amplifiers, with the use of Digigram on-board DSP processing coupled with advanced analog components supplied by THAT Corporation.

During the presentation, scheduled for 5 p.m. on Oct. 19, Nicolas Sturmel, research project manager at Digigram, will discuss how the company overcame the challenges of fixed gain steps and variable delay of the gain command to engineer a very simple yet high-quality, digitally controlled automatic gain using only 10 MIPS of processing power from Digigram s CANCUN high-end USB sound card, plus the built-in, high-end, digitally controlled mic preamplifier based on THAT1570/5171 chips. Following the presentation, Sturmel will be available for further discussion at the THAT Corporation booth, #2734.

Since 2011, Digigram has chosen THAT integrated circuits for the analog inputs of the CANCUN USB sound card, said Sturmel. The THAT1570/5171 preamp and gain controller provide the best of two worlds with no compromises: one dedicated chip for top-notch analog quality and one chip for digital ease of control. This modular solution assures the lowest- possible noise level and distortion. With the THAT integrated circuits, CANCUN is one of the rare USB- powered sound cards with four studio-grade +48v-powered mic preamps and with an innovative AGC now.

A voltage-controlled amplifier is a great way to control levels, but being positioned after the microphone preamp, it cant prevent the preamp from overloading on large signals, said Les Tyler, president, THAT Corporation. Digigram s clever solution uses our digital controllers to change gain in the preamp itself, thereby avoiding overload from the start.

More information about THAT Corporation is available at www.thatcorp.com. More information about Digigram and the company s products is available at www.digigram.com or by phone at +33 4 76 52 47 47.

LINK:	http://www.digigram.com/company/article.php?id=582...
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