2015-05-13 11:08 AM
Hi,
Please suggest a method to design 6-channel audio mixer using STA309A. 6 Bluetooth devices will be interfaced to the SDI inputs of the mixer and the 6 mixed outputs will be given to the BT modules through SDO.Thanks and Regards,Manesh2015-05-13 05:53 PM
hi Manesh ,
the mixing feature could be implemented biquad filter setting , please refer to datasheet page 60~61. there are 2 mixer inside STA309A , and you can adjust mixing ratio (from 1 to 0) from 8 channels input in each channel . or you can mix them after EQ processing . Thanks2015-05-14 03:26 AM
Hi Zhao Yun,
Thanks for your quick response.Is there any option to connect 6 I2S devices? The application is for mixing audio of 6 Bluetooth units with I2S interfaces. I feel that anyway requires more that one STA309A.2015-05-14 06:04 PM
hi Manesh ,
for 6 channels I2S bus input , means that you have around 12 channels audio input , you have to use 2 pcs of STA309A in series ( one for 4 channels I2S input mixing , another for 2 I2S channel input plus 1 mixed I2S input mixing ). Thanks