Skeptischism
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- Sep 6, 2019
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regarding ODROID, it has no multichannel i2s. if you look at the pinout on the odroid connector that they rather strangely claim contains multichannel i2s (J7) it is a 7 pin connector that only has 2 channel i2s, GND, +5V and spdif. 7 pins isnt enough for 8 channels i2s, even if they wanted to (you need minimum 10 for that and that's without mclk, spdif, 5v, or GND). it seems perhaps someone on the DEV team wanted it to have 8 channel so much they said it did, but it doesnt . It doesnt give a lot of hope for the platform when they cant even get that right and the information is left there since 2018 without being corrected. I thought it was strange that nobody knew it had 8 ch i2s. there is an outside chance it contains multiplexed TDM (but certainly not at those speeds), but its much more likely someone just screwed up and just pulled those numbers from their ass,. The SoC supports it I believe, but no dice exposing it on the odroid. I found this, which contains a bit of handwaving, ending in 'no, but you are free to try and make multiplexed TDM work yourself if you wish'. TDM input on DAC chips is fairly rare, its doable with an FPGA, or dedicated receiver chip, but is it worth the trouble?