Hi there,
I’m looking for a cost effective solution for testing digital audio continuity with I2S and TDM.
This would involve pattern generation and output on a Tx pin with a specified format, then analysing the received pattern on the Rx Pin.
It seems that the latest discussion on this here was 3 years ago, has there been any development since?
Thanks
Hi @Matt2,
has there been any development since?
No, there hasn’t. The original I2S interface was to drive some of the Class D chips with I2S inputs. The world of serial audio formats can quickly explode. You start with simple I2S, then you get into bit depth, justification and framing options (which are just software), TDM, DSP mode, PDM, TDM-I2S. An FPGA is probably needed to handle every flavor. And then you get into the various physical layers (HDMI, eARC, CMOS, SPDIF, AES/EBU, optical). It’s a massive problem space. There’s a reason the traditional vendors are charging so much for a module that will handle the above. As an adder, you are probably looking at a market price of $5k to $10k for hardware/software that can handle a big chunk of the standards
Hi @matt
Thanks for the reply. While it’s a shame, I understand the challenge. I think there’s a gap in the market for a low-cost solution using something like Atmel SAM, STM32, NXP RT11xx and the SAI options they have. Thanks anyway!
Hi @matt2, rest assured the serial audio formats will getting more attention with the 2.0 software, but I just want to set expectations that the breadth of serial audio problem space is massive, and a full blown test solution is worth the $10k existing manufacturers are charging.