USB to I2S adapter for audio transceiver

ilans Guest 2019-01-31 13:33 #5717719

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Hello, all!

I need an adapter / bridge to connect a MEMS tranceiver to my PC, to 
stream audio data for DSP purposes.

The tranceiver can either send or receive PDM data at up to 3.072mHz 
(based on clock input).

I suppose I need an I2S-USB adapter / bridge, that also comes with a 
driver software, where I can set direction, data and clock rate.

It should be fast and reliable enough to allow real-time DSP analysis on 
the PC.

Can you please recommend such a tool?

Thanks!

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Andreas S. (andreas) Admin 2019-02-03 18:16 #5721658

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Take a look at XMOS, they have an open source implementation of USB <-> 
I2S/TDM for their chips. There are quite a few boards sold for this 
purpose, e.g.: http://jlsounds.com/i2soverusb_n.html

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derguteweka Guest 2019-02-06 09:08 #5725158

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Moin,

Nothing out-of-the-box, but it somehow looks for me like it might be 
doable with some STM32 µC e.g. by combining the Application Notes AN5027 
and AN4711.

Gruss
WK

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Ainsworth P. (penelopeainsworth) (Company: IBM) 2024-06-22 10:57 #7689515

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Hello, As per my knowledge, You need an I2S-USB adapter to connect your MEMS transceiver to your PC for streaming audio data ,it help to support PDM data up to 3.072 MHz and come with driver software to configure data direction and clock rates. Make sure that this is fast and reliable enough for real-time DSP analysis on your PC.

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J. S. (engineer) 2024-08-10 21:32 #7717510

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USB to I2S adapters are available in masses. The issue is the processing of the PDM. Depending on the application a specific filtering has to be applied to provide the most appropriate PCM signal from it to feed I2S. I once used a €7,- FPGA to implement a PDM-Filter and I2S decoder for this.

In the meanwhile I came out with an S/PDIF output which I read directly with a PC. If your soundcard cannot do this, use a $20,- USB_to_S/PDIF-Converter.

If you need the PDM directly in the PC use a DSD-capable Audio Soundcard. Practically 3.072M is in fact DSD64-style.

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