Hi,
I am interested to make a i2s to spdif pcb so I can get the digital out of my raspberry into my DAC.
I know that there are some chips that do that but have no idea on quality etc.
Could anyone list some with short pros and cons please?
Thank you.
I am interested to make a i2s to spdif pcb so I can get the digital out of my raspberry into my DAC.
I know that there are some chips that do that but have no idea on quality etc.
Could anyone list some with short pros and cons please?
Thank you.
You might want to consider this:
24Bit/192KHz ES9023 DAC, I2S input, Ultra Low Noise Regulator - DIYINHK
24Bit/192KHz ES9023 DAC, I2S input, Ultra Low Noise Regulator - DIYINHK
Not quite,
I need a SPDIF output, not analog. I have my own DAC that I want to use. My DAC also supports i2s but I want to keep that path as short as possible that's why I want to use my DAC via SPDIF.
I need a chip that does i2s to spdif only. But there is some nice information about the layout in that link 🙂
I need a SPDIF output, not analog. I have my own DAC that I want to use. My DAC also supports i2s but I want to keep that path as short as possible that's why I want to use my DAC via SPDIF.
I need a chip that does i2s to spdif only. But there is some nice information about the layout in that link 🙂
http://www.wolfsonmicro.com/documents/uploads/data_sheets/en/WM8805.pdf
It doesn't do only I2S to S/PDIF, it goes the other way too.
It doesn't do only I2S to S/PDIF, it goes the other way too.
FWIW I have made two identical dacs, one with i2s input and the other with spdif input. No idea why, but the i2s version sounds remarkably better. If your dac has i2s input, why aren't you keen on using it?
I was going to ask the same question, I2S will probably provide better results with the RPi if the dac is somewhat jitter tolerant.
I may go with wm8804 as I have only 1 channel.
I can't put my raspberry pi inside my DAC as it does not fit 🙂 so then I'd have to run longer i2s wires and that's not recommended... right?
I can't put my raspberry pi inside my DAC as it does not fit 🙂 so then I'd have to run longer i2s wires and that's not recommended... right?
With I2S there's no isolation from common-mode noise, with S/PDIF a trafo can be used. Longer (say up to 15cm) I2S wires aren't generally a problem.
15cm would only give me room to cut the case and run the wires outside into the Pi that would sit on top of it.
Or, make a new enclosure that can fit both the DAC internals and the Pi, and the power supply for the Pi and a source selector so I can use the Pi for streaming and PC when needed. And that's a hell of a lot more money than I'm willing to spend 🙂
Or, make a new enclosure that can fit both the DAC internals and the Pi, and the power supply for the Pi and a source selector so I can use the Pi for streaming and PC when needed. And that's a hell of a lot more money than I'm willing to spend 🙂
I'm not saying that >15cm will be a problem, just I'm conservative by nature....
You might look into Twisted Pear's differential I2S transmission board, it will send I2S over many metres. Cheaper to use an WM8805 though (over here WM8804 is dearer).
You might look into Twisted Pear's differential I2S transmission board, it will send I2S over many metres. Cheaper to use an WM8805 though (over here WM8804 is dearer).
I'm looking for an alternative on the WM8804 (to do some tests). Is any of the Cirrus CS84XX chips a good option for I2S to S/PDIF conversion? I need 16bit//44.1 Khz output.
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