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Audio Application

Mark Philip Felipe
Genius 11160 points
Other Parts Discussed in Thread: DAC80502

Hi Team, I am assisting a customer that needs some application inputs. Below is his inquiry, hoping if you can help us identify what type of application he is needing. 

1)
I need a part which can work with various frequencies (5-50000 Hz coming from old Sound Blaster chips like OPTi933 for example) in I2S format and convert it to one fixed frequency as 44.1 or 48kHz for using with modern devices. When you have such part with WSS codec it would be the best.
I only found one such part which has a WSS codec that has a mode where its DAC data is exposed, and *only* the Chrontel part does it, others never made a WSS codec with such a mode. They only have a mode where DAC + ADC are disconnected from controller part, so that the chip can be used as generic DAC + ADC but I need an opposite method, a thing that exposes controller output to an external DAC + ADC. Only the Chrontel CH6357 part has this but it is no longer available 

2)
A second part is a format conversion part which can convert async sample rate to a symmetrical sample rate. I am receiving digital information in an accidentally burst instead of symmetrical signal. Such signal is not also usable with modern devices as AV receivers.  That part can take output meant for non-oversampling DAC in I2S and related formats which can convert its output to something suitable for a modern oversampling DAC, while having to accept arbitrary sample rates.
I want to connect my synthesizer to AV receiver.

Thank you very much.

-Mark

  • 0
    TI__Guru 55353 points

    Hi Mark,

    That is a very specific request, and I doubt we have a device that fits this perfectly.  If they have a non-continuous sample format, they can either implement a FIFO type buffer to clean it up, or use a standard precision DAC, like the DAC80502 to be the output.  They might need to implement some digital logic to convert the input signal to SPI, but it would not need the FIFO.

    Thanks,

    Paul