5/2/2024 0 Comments Cmedia cm6206 windows 10![]() There’s no doubt that the producers of DCC cassettes didn’t use the entire standard as it exists now. As you may already know, it’s very expensive to buy a copy of the standard, and the standard is very complicated. Then you can write a program on the PC that implements the ISO/IEC 61866 standard for ITTS. It shouldn’t be too hard to design a circuit with an SPDIF receiver like the M51581, that has separate pins for the subchannel data, and a microcontroller that reads that data and sends it to a PC via serial or USB. The ITTS box that the museum has, uses one microcontroller to decode the User Data channel and one microcontroller with a Teletext video generator to put the information on the screen. I don’t know if that chip is still available but I imagine that other SPDIF receivers work in a similar way: They convert the incoming audio to I2S and have separate serial output pins with only the bit stream for the User Data subchannel and the Channel Status subchannel. The page of that project also has a link to the datasheet of the Mitsubishi M51581 SPDIF receiver chip (whic, by the way, was also used in some recorders). My SPDIF receiver project has some information on how the subchannels are encoded.Īs you may know, I did some reverse-engineering on the ITTS box of the DCC museum. The ITTS information is transmitted in the User Data subchannel of the SPDIF signal, and it’s not part of the audio, so it doesn’t end up in the I2S stream. I think you mean: Is the ITTS information available in the I2S stream that comes out of an SPDIF receiver? The answer is no. ![]() Is the I2S information kept when converting S/PDIF to I2S or would I have to build a custom S/PDIF decoder? B07DGR9M6M is the ASIN, avaible on European Amazon for about 15 €. I will keep you up to date, when I receive the unit. Is the ITTS information kept when converting S/PDIF to I2S or would I have to build a custom S/PDIF decoder? Any insight where ITTS data is stored in the signal found one relatively cheap commercial USB audio interface, that supports S/PDIF in, but it is according to the driver name based on the older Cmedia CM6206, which advertizes SCMS compliance and has lower resulotion. But if I bother to design something, I could just build something completely new, that could support ITTS. Supports S/PDIF input for are available only in USB Audio Class 2.0/High-speed mode)īut sadly, I found no board utilizing that feature, I am thinking about designing a PCB for that chip or modding one existing board. The Cmedia CM6610A does support S/PDIF input to USB: I am interested in a solution for S/PDIF input without SCMS detection to USB.
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