Kernowpete

I am a student and I am new to Max and the forum, so I hope this isn,t a repeat question. I researching using max for synth app, controlled by gestures played on surfaces, and I have a question regarding using hardware with it on an iPhone.

I am trying to figure out a way which I can utilise the TRRS headphone input to connect a contact mic and use the headphones at the same time. I have used the "IRig" and units like it, designed to plug instruments in and monitor in headphones. While these devices work, I am finding at the sensitivity levels involved in this application these have feedback issues?

I believe the iPhone requires a Low Impedance to, If you like switch to the TRRS and allow the mono mic input as well as headphones. I read on apples site this is no higher than 32 ohms?

My question is, does anyone know of a simple solution to take a high Z direct from piezo and convert to the level Apple specifies for the TRRS?

And any more specific information about the TRRS and how it works, i.e having it correctly set-up so when you plug it in the headphones it switches automatically.

I would like to not add any D.I boxes or Pre-amp's, something that would be compact and hopefully cheap.

My question is, does anyone know of a simple solution to take a high Z direct from piezo and convert to the level Apple specifies for the TRRS? 

connecting-a-piezo-mic-directly-to-the-iphone-trrs-headphone-beginers-question

Also waiting for a reply, still needs an expert to help us out, I am facing same issue and I really loosing hope to figure this out.

Thanks,
Danielle an ipad keyboard case designer


which might be of some help. It addresses the impedance issue that you pointed out and suggests a way to adapt an existing microphone circuit to work with the piezo input.

I am also looking into this and read this helpful discussion which might be of some help.  It addresses the impedance issue that you pointed out and suggests a way to adapt an existing microphone circuit to work with the piezo input.  

Connecting a piezo mic directly to the iPhone TRRS headphone. Beginers Question.