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Filter for Playback Example

Question asked by Lucia_Microtech on Jun 20, 2018
Latest reply on Jul 5, 2018 by Reva@14

Hi,

I tested the ADSP-SC573 Evaluation Board with the ADC DAC Audio Playback project (SC573 SHARC) and the test was successful, at this point I would like to filter the signal with a low pass filter using the sample IIR Filter Response project (SC573SHARC). The filter inputs are the samples of the ADC and the filter output must be sent to the DAC. In particular, referring to the ADC DAC Audio Playback project (SC573 SHARC), the DacCallback functions (void * pCBParam, uint32_t nEvent, void * pArg) and AdcCallback (void * pCBParam, uint32_t nEvent, void * pArg) trigger a flagerror (bEventError) during the filtering process. How can we correctly implement a low-pass filter in that project and correctly manipulate the sample buffer to be sent to that filter?

Any help on this would be very much appreciated.

Many thanks

Lucia

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