Comments on: Dock Connector Audio I/O

By: Rick

Rick — Wed, 30 Nov 2011 22:32:34 +0000

I would have to assume that you get requests about newer audio devices that become available to the iOS platform. I recenly ppurchased the Apogee Jam, and would like to get your opinion on it some day. I know the Jam does work with SignalScope as I have tried it.
It is an input device only and is designed to work directly with a guitar; however, the basic principle is still an A/D with possibly a h/p filter on the front end.

Someday perhaps, you would post info on the Jam in your Dock Audio Accessory Compatiblity list. Possible mention frequency response and distortion measurements.

Thank you.
best regards,
Rick

By: Bill

Bill — Wed, 25 May 2011 18:24:30 +0000

These are the issues I’m also having. What is needed here is a clearly illustrated signal flow plan that’s written into the APP by the manufacturer as well as pin outs and connection suggestion diagrams. It seems obvious to me that an app designed for spectrum analysis (Sig Scop Pro) would expect customers who want direct input to the software can easily find and determine a very easy approach to that end. Personally, I have not found such a document (drawing or diagram) here but hopefully I will. If so, my comments here are nonsecutur. But otherwise, please take my comments as a suggestion to provide such diagrams and documents to accompany a good product this promises to be. I appologize if the diagrams are, in fact, available on this site but as yet undiscovered. I submit this comment with good intention after having the app for a few days, placed an order for a $40 docking A/V cable but can’t even determine if, upon arrival, this approach to get a direct signal input to the app will be successful (without internal microphone pickup). Best regards, Bill

By: newc

newc — Fri, 22 Oct 2010 21:31:48 +0000

I would really LOVE to use the faber acoustical audio measurement software on my 3gs iphone. But only if I can use the higher audio quality available via the dock connector. I want to be able to plug a decent mic into the dock connector. Sounds simple enough, but I have spent too many dollars already experimenting with connectors, adapters, and various dock connector mic “solutions” (Belkin for example) but I have found no combination that is reliable. I’ve spent hours upon hours researching this trying to find a good off the shelf REASONABLY PRICED product or even to find a satisfactory DIY solution. Personally I’m not spending several hundred dollars for a mic adapter that only works on my iphone, which may or may not be around in 2 years. So I give up (funny I say that but here I am back on this site hoping for solutions). If Faber or any of their competitors want to sell me their products they will have to be more helpful and either encourage someone to build a decent reasonably priced dock connector/mic or have it built. Either that or post a YouTube that shows how to use an OTS adapter with a decent electret mic.

By: ben

ben — Mon, 16 Aug 2010 22:48:18 +0000

Dan, There currently isn't an option for stereo line-level input on the iPhone 4. See the iPhone 4 post.

By: Dan

Dan — Sun, 15 Aug 2010 21:03:50 +0000

Ben,
I am trying to convert analog audio from my tape player using iPhone 4. I need stereo line-level input into the iPhone 4. please let me know which adapter works best and which application to use. I do not need microphone input. Your help is greatly appreciated!
Dan

By: Alex

Alex — Wed, 28 Jul 2010 19:05:32 +0000

I may try to contact Apple… However it’s ridiculous that I have to pass through all this to get a simple information. All I (and many other people) want is to get audio input working.

By: ben

ben — Wed, 28 Jul 2010 18:35:45 +0000

This is not as difficult to do as you might think. A local business license might cost you $20 or $30 to set up as an individual (sole proprietor). The MFI program offers an adjunct licensee option that gives you access to the docs without any of the reporting requirements of full membership. If you contact Apple, they may allow you to get signed on as an adjunct licensee for the purpose of allowing you to get the necessary information to evaluate the potential business opportunity for iPhone accessory development.

By: Alex

Alex — Wed, 28 Jul 2010 18:25:43 +0000

Thank you for your anwser Ben, but I’ve already tried to apply. I just can’t proceed as I don’t have any “business license/certificate, tax license, commercial registration, or equivalent”.
Anyway, my email is always valid…

By: ben

ben — Wed, 28 Jul 2010 15:08:17 +0000

Alex,
I would still encourage you to apply to the Made for iPod program for access to iOS device specifications.

By: Alex

Alex — Wed, 28 Jul 2010 14:12:06 +0000

Hello,
this is the most interesting page I’ve found in the net about iPhone/iPod Touch dock pinouts for line input. However I still haven’t found a solution to my problem.
I’m using an iPod Touch 2G with OS 3.1.2 (Jailbroken).
I modded a dock cable in order to use the audio input pins (5 and 6) but it seems they are disabled.
I also connected pin 11 to pin 15/16 (I didn’t try the modded cable without this last connection).
I tried with and without the connection between pin 15/16 and 21 with a 68KOhm resistor (but there was no difference). In both cases the integrated volume control was disabled and the audio output was working ok (at a rather high volume).
Maybe I have to choose a different resistor to indicate the kind of device I’m using? I wanted to register to the Made for iPod program, but I’m not a company, nor I have an app (yet).
Anyone could help me to make stereo input work?
Thank you in advance for your help,

Alex

By: ben

ben — Tue, 06 Jul 2010 23:29:01 +0000

The Alesis ProTrack works with the iPhone 3GS. However, the iPhone’s headphone jack will be covered by the ProTrack shield (which you have to purchase separately).

By: Odemar Costa

Odemar Costa — Sun, 04 Jul 2010 14:08:41 +0000

Good Morning.

Searching for Alesis Pro Track I found many posts about this device.
But the majority of these posts are refered only with using on Ipod.
I´d like to know if Alesis works OK on Iphone 3Gs?
Thanks for this technical information. Odemar Costa.

By: David

David — Tue, 25 May 2010 11:58:26 +0000

Ben, thanks for interesting information.

I need to master a couple of tracks, so that they sound good
on an iPhone 3G speaker.
So, I don’t really need to record audio, but need to pass line level signal into iPhone and hear it on internal speaker.
Would it it possible to do it, with any of the above devices?
Of course, the recording software must be able to monitor the signal.

thanks, David

By: ben

ben — Fri, 30 Apr 2010 16:29:23 +0000

Allen,

The iPhone OS automatically selects the audio input source, depending on what you connect to the device.

Ben

By: Allen

Allen — Fri, 30 Apr 2010 15:59:59 +0000

Ben how did you go about initialising the line-in functionality as i am trying to simply just adapt aurio touch to accept line in.

By: Greg

Greg — Fri, 26 Mar 2010 03:34:28 +0000

I think he is refering to something that can plug into a 3g and provide line (5v) level inputs as apposed to mic level (1v)

By: ben

ben — Thu, 18 Mar 2010 14:39:20 +0000

Dan,

It’s not clear what you’re asking. All of the devices listed above can be used with an iPhone 3G. They all have mics, but I am not aware of any line input accessories that do not. If you just want to record stereo signals, then I recommend that you check out the various recording apps available for iPhone. If you want to analyze the input signals, SignalScope and SignalScope Pro are both capable of working with 2 input channels (stereo line input).

By: Dan

Dan — Thu, 18 Mar 2010 13:36:21 +0000

Hi. I have been reading all the above and would like to know in a sentence what can I connect to an iphone 3g with stereo line level input and what app records stereo line input. NO MICS needed

By: ben

ben — Fri, 19 Feb 2010 23:37:34 +0000

The MacAlly iVoice Pro works with all versions of the iPhone OS, so far.

By: Tom

Tom — Tue, 16 Feb 2010 16:02:11 +0000

Hi,
from what I’ve read here I’ve understood that Ivoice Pro works with Iphone 3G FW 3.1.2 Is it right?

And Ben, Can you do me a small favour? If I give you an app to try can you tell me if it works with Ivoice Pro?

Thanks.