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DIX9211: Fixed sample rate on I2S different sample rate on DIT and DIR

Giuseppe Cannarella
Prodigy 85 points
Part Number: DIX9211
Other Parts Discussed in Thread: SRC4392, SRC4382

Can be possibile to use the DIX9211 to have a fixed sample rate of 192KHz on I2S port and use DIT and DIR with different sample rates?

In my case I need to receive from DIR a AES/EBU signal with 44.1 or 48KHz sample rate, then pass throught a DSP (running as software into an embedded board) and the output the processed audio (that have a bandwith that need 192KHz SR) to the DIT output (AES/EBU).

There's inside the DIX9211 an internal sample rate converter?

If I cannot do with this device, there's a device that allow this operation?

Thanks

  • 0
    TI__Mastermind 23050 points

    Hi Giuseppe,

    The DIX9211 does not have an integrated sample rate converter, but if your DSP has multiple I2S interfaces then you may be able to do this. The DIR would accept the AES signal and convert to I2S for your DSP to process, and then the DSP could implement the sample rate conversion and run a separate I2S line with the necessary clocks which could then be fed to the DIX9211 and output through the DIT. 

    If that is not what you are looking for, then you may consider using the SRC4382 or SRC4392 as those do integrate an AES interface with multiple PCM ports and a sample rate converter.

    Best,

    Zak

  • 0 in reply to Zak Kaye
    Prodigy 85 points

    Zak Kaye said:

    Hi Giuseppe,

    The DIX9211 does not have an integrated sample rate converter, but if your DSP has multiple I2S interfaces then you may be able to do this. The DIR would accept the AES signal and convert to I2S for your DSP to process, and then the DSP could implement the sample rate conversion and run a separate I2S line with the necessary clocks which could then be fed to the DIX9211 and output through the DIT. 

    If that is not what you are looking for, then you may consider using the SRC4382 or SRC4392 as those do integrate an AES interface with multiple PCM ports and a sample rate converter.

    Best,

    Zak

    HI Zak, thank you for your answer. It's all clear. Unfortunately I don't have two I2S port then I will use one of the suggested SRC.