Hello,

I found the PI I2S pinout and am wondering if we can make our own I2S
hdmi cable. Some popular high end DACs use it now...

On this document we can see what hdmi pins ps audio spec uses for I2S:
https://docs.google.com/spreadsheet/lv?key=0AgVhKcl_3lHfdFhNT0xWQnNVWTI1QjhTdXVGVThiYnc&pli=1

Here's what I found on the Pi I2S pinout:
GPIO#   ALT2     
28       PCM_CLK  
29       PCM_FS  
30       PCM_DIN  
31       PCM_DOUT 
described as clock, frame clock, data-in and data-out.

more about accurate placement here:
http://www.raspberrypi-spy.co.uk/2012/09/raspberry-pi-p5-header/

First of all, is that dependent on the OS release? Does it work the same
way on picoreplayer?

Second, in the first document above there's a lot of acronyms but not
the same as used in the Pi pinout description I found... can the experts
guess which hdmi pin goes on which GPIO?

Then I guess I need an hdmi cable tester to sort out what wire goes to
what pin, a bit of soldering and voila!

Or am I completely wrong?



Stereo - SPK: Triangle Magellan Quatuor - PRE: XSP-1 Gen2 - AMPS: 4 x
XPA-1 Gen2 - SOURCE: Logitech Transporter

HC - SPK: Triangle signature Gamma + 2x Elipson Planet M - PRE: Marantz
AV8801 - AMP: XPA-3 - SOURCES: PS3, PopcornHour A410

Multi room : B&W 705 and Monitor Audio Silver RX on 2 Mini-X A-100
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