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Hi in this card I encountered a strange problem, as OS X audio output gives me the headphone jack alone, I don't understand what the problem is and where to start, I just did the pram reset
I measured AUD_IP_PERIPHERAL_DET with the 4.5V mi inserted headphones and with the headphones not inserted 3.0V but the system shows me only the earbuds as output
Not sure about that.
On 820-3115, that signal is pulled-up to 4.5V; switches 0<->4.5V, depending if headphones (or SPDIF) is inserted.
Strange that on this Air board is pulled-up to 3.3V...
Audio codec expects another signal from the audio connector, to know if headphones, or speakers must be used as output.