DSP-based audio mixer unit for radio and television stations
27% price reduction and better quality thanks to Digital Signal Processing
Technologies used


Industrial sector (PRODCOM code)
    323 Television and radio receivers, sound or video recording, etc.

The company SES Schlegel Elektronik Systeme GmbH, Heesfeld 17, D-38112 Braunschweig designs, produces and sells high-end professional audio equipment for radio and television stations.

One of the products is a Continuity-Mixer for analogue audio signals which is used in broad-casting and television companies with traditional equipment to mix audio signals before they are transferred to the transmitter. The component is designed in 19" technology with different PC-boards in Eurocard C-format. The applied integrated circuits are dual inline products.
Recently the television and broadcasting studios started working with digital audio equipment because the audio sources are also stored in a digital manner (CD, digital recorders). These new digital studios also require audio Continuity-Mixers which are able to select and mix digital audio sources. New investments in the studios are done in digital equipment therefore sales of the analogue Continuity-Mixer decrease.

To maintain the market share SES had to develop a Continuity-Mixer for digital audio signals. Objective of this application experiment was to substitute the analogue signal processing unit for a digital mixer based on digital signal processors, DSP and surface mount devices, SMD technology.

With the new Digital Mixer we have gained a size reduction of about 50% and price reduction of about 27 %, compared with the original Continuity-Mixer. The know-how in digital signal processors and surface mount devices is also necessary for other products of the SES company and will thus lead to an overall strengthening of the competitive position. We expect a product lifetime of about 10 years.
The duration of this AE was 10 month, the total costs were 85 KECU. The pay back period is expected to be 2 years. The overall return on investment is expected to be 250%. Experiences from this project may be of interest for all companies that develop and work with high quality audio equipment like broadcasting- and television-companies, theatres, cinemas, planetariums and concert halls.


    SES Schlegel Elektronik Systeme GmbH
    Heesfeld 17
    D-38112 Braunschweig

Detailed information

You can also benefit from microelectronics

DSP technology provided SES Schlegel Elektronik Systeme GmbH with the means of improving its products and enhancing its market position. You can also achieve significant benefits by acquiring the right microelectronics technology and utilising it in your product or manufacturing process. You can get help from FUSE to realise this.

FUSE is a technology transfer programme, funded by the European Commission to stimulate the wider use of microelectronics technologies by European enterprises to increase their competitiveness and enhance their economic growth. The demonstrator described here is one of many examples in the public FUSE portfolio covering the whole spectrum of microelectronics technologies and spanning a wide range of applications and industry sectors.

FUSE provides you with:

  • Best practice in acquiring specific microelectronics technologies and conducting full development projects through the FUSE portfolio of real life demonstrator documents.
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Further information and support relating to this and other demonstrators can be obtained from the addresses below.

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