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Regarding 4channel Audio Daughter Card(EDSP)

ajaruddeen pyati
Intellectual 625 points
Other Parts Discussed in Thread: PCM3794

I have some queries regarding audio daughter card .please help me to find out solution for same. i want purchase 4channel Audio Daughter Card so i have the following specification so please let me know whether the 4 channel audio daughter card from EDSP will support these specifications or not.

  • Simultaneous multichannel audio acquisition
  • Minimum number of microphone in should be 4
  • All the microphone in ADCs should be driven with same clock
  • Digital data out from daughter card to main board should be in interleaved fashion, as below. This is to make sure that all the microphone signals are in synch

 

Mic1

(PCM sample 1)

Mic2

(PCM sample 1)

Mic3

(PCM sample 1)

Mic4

(PCM sample 1)

Mic1

(PCM sample 2)

Mic2

(PCM sample 2)

Mic3

(PCM sample 2)

Mic4

(PCM sample 2)

Mic1

(PCM sample 3)

..

  • 0
    TI__Guru* 84110 points

    Ajaruddeen,

    Educational DSP is part of the TI Third Party Network. They are the ones who will have experience and expertise for their 4 channel audio daughter card.

    You will want to also check with them whether it is compatible with whichever DSP DSK or EVM you will be using.

    Regards,
    RandyP

  • 0 in reply to RandyP
    Expert 2210 points

    According to information on the eDSP Web site, this daughtercard has 4 independent microphone channels (each with its own ADC) synchronized to a common master clock.  The card supports 4 audio channels when used with TMS320C6711/6713/6416T/5510 DSKs, using 2 McBSP channels.  The PCM3794 codec datasheet says that the output format is programmable, with your choice of left or right channel first (on each of the 2 McBSPs).  If your program reads data alternately from the McBSPs, you can get the desired interleaving.