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iPod / iPhone output digital audio via Apple Camera Connector for iPod?

post #1 of 78
Thread Starter 

I am wondering if the iPod / iPhone can output raw digital audio to an external DAC via the Apple Camera Connector for iPod:

http://www.amazon.com/Apple-Camera-Connector-iPod-White/dp/B00083PGFS

 

315MWZH7FHL._SL500_AA300_.jpg

 

The iPad can output raw digital audio to an external DAC via the iPad camera connection kit:

 

iPad > iPad camera connection kit > TTVJ Slim > Ultrasone Edition 8

 

 

2237b6fd_IMG_2657.JPG

 

 

The iPad camera connection kit or the Apple Camera Connector for iPod should include an Apple authentication chip which carries out IAP (iPod Accessory Protocol) authentication operations on an accessory device and allows the accessory device to access to the iPad / iPod to bypass the iPad’s / iPod's internal DAC.

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post #2 of 78

I have read that the iPhone / iPod Touch cannot use the connection kit for audio output right now (I believe I read that on the Camera Conncection Kit thread).  My take is that they probably will be able to with the next iPhone OS update.  The iPad is running OS 3.2 that has items that the current iPhone / iPod Touch does not since they are on OS 3.1.3.

post #3 of 78
Thread Starter 

I don’t think so because for the time being the iPad cannot interoperate with the Onkyo ND-S1 iPod/iPhone dock:

http://www.soundmancaraudio.com/home/2010/4/11/first-ipad-in-a-car-part-2.html

 

The Apple IAP authentication procedure is something like the following:

 

Apple authentication chip of the Onkyo ND-S1 -> iPad:

Hi! I’m an iPod/iPhone authenticated auxiliary device. Could you please open your digital audio gate?

 

iPad -> Apple authentication chip of the Onkyo ND-S1:

No! I can only open my digital audio gate if you are an iPad-authenticated auxiliary device

 

 

However, if Apple people don’t want to get shot in their foot (by Android devices), the Apple authentication procedure in the upcoming Apple firmware could be the following:

 

Apple authentication chip of the Onkyo ND-S1 -> iPad:

Hi! I’m an iPod/iPhone authenticated auxiliary device. Could you please open your digital audio gate?

 

iPad -> Apple authentication chip of the Onkyo ND-S1:

Yes! I can open my digital audio gate, because you are either an iPad-authenticated auxiliary device or an iPod/iPhone authenticated auxiliary device.

 

or

 

Apple authentication chip of the iPad camera connection kit -> iPod/iPhone:

Hi! I’m an iPad-authenticated auxiliary device. Could you please open your digital audio gate?

 

iPod/iPhone -> Apple authentication chip of the iPad camera connection kit:

Yes! I can open my digital audio gate, because you are an iPod/iPhone authenticated auxiliary device or an iPad-authenticated auxiliary device.

post #4 of 78
I would have preferred sock puppets, but thanks for that. :)
post #5 of 78
Quote:
Originally Posted by Noumenon View Post

I would have preferred sock puppets, but thanks for that. :)


post #6 of 78
Thread Starter 

Sorry for this kind of writing!

It is influenced by the Alice & Bob example from the cryptography course.
http://www.definityhealth.com/marketing/how_ssl_works.html

No intent to offense.

post #7 of 78

will this work with other DAC/headphone amps?

post #8 of 78

I've ordered the camera kit and will undoutedly upgrade to OS 4.0 I can tell you.

post #9 of 78
Thread Starter 

Thanks!

 

By the way, I read regularly your reviews on your website.

post #10 of 78

Oh thanks! I am looking forward to getting my stuff (yes, I ordered an iPad) for whilst out and about. I need to have the freedom to shoot and write and my laptop doesn't allow me that without pain. A bit of finger pain may throw me, but I'm prepared to wrinkle into the iPad's cramped virtual keyboard.

post #11 of 78
Thread Starter 

Now, I have a doubt.

What do you mean by “camera kit”? “Apple camera connector for iPod” or “iPad camera connection kit”?

 

iPad > iPad camera connection kit > external DAC : it works!

iPod/iPhone > iPad camera connection kit > external DAC : it doesn’t work!

http://www.head-fi.org/forum/thread/483404/ipad-to-support-usb-audio-interfaces-via-camera-connection-kit/45

 

iPod/iPhone > Apple camera connector for iPod > external DAC : ???

post #12 of 78

I mean the camera connection kit for the iPad - there is hope that the OS 4.0 will enable usb audio on the iPhone/iPod touch, but who knows. I will be using the Headphonia usb cable, a 59$ usb DAC that uses next to no power compared to outboard amp/DAC solutions. 

post #13 of 78
Thread Starter 

iOS4 is available.

 

Any good news?

post #14 of 78

My iPhone 4 showed up today. Just tried plugging in my Camera Connector -- no luck.   "This accessory is not supported by iPhone."


Edited by muski - 6/23/10 at 2:26pm
post #15 of 78

My iPhone 4 showed up today.  Plugged in my Camera Connector -- accessory not supported.

 

photo.PNG

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