Mic-Line - Line-Level Audio Input Adapter for iPhone & Smartphones

(13 reviews) Write a Review
Record line-level audio from your mixer or soundboard into your smartphone or laptop!
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Product Overview

Easily record from a mixer or soundboard directly to your smartphone, laptop, or tablet! 

The iPhone-Mic-Line replaces your phone's microphone level audio signal with line level input allowing you to record on your device as if the sound was coming directly from it.

  • Record line level audio from your mixer or soundboard on your iPhone, smartphone.
  • Allows your external audio output to replace your smartphone's mic. Includes line mic attenuator that allows for line-level to mic-level conversion
  • Works with most phones that have a combined headset and microphone jack
  • Connect two audio sources simultaneously, just use a splitter!
  • Crystal clear sound recording, 100% guaranteed

Our line level input converter allows you to record audio on your iPhone from outputs such as a headphone jack or audio output jack such as a turn tables, mixers, soundboards or other professional audio equipment. The iPhone-Mic-Line replaces your phone's microphone level audio signal with line level input allowing you to record on your device as if the sound was coming directly from it.

The cable is approximately 13 inches long.

How it Works:
  1. From the line out of your audio source, plug in the cable required ex.(XLR male to 3.5mm TRS male). 

  2. Insert the male 3.5mm (1/8 in.) TRS plug into the female end of the Mic-Line(Blue Line In). 

  3. Plug the male TRRS end of the Mic-Line into your phone, laptop, etc.*  

  4. The device will recognize this as an external audio source and turn its internal microphone off allowing you to record using the external source. 

  5. Open your Camera App and record! 

*You will need a lightning, USB-C, or USB adapter depending on your device. Please note: Apple brand lightning adapters DO NOT work on iPhones except on iPhone 12. 

Combine your Headset Buddy Mic-Line product with any of these adapters for more uses:

This adapter works with all audio/video recording apps. 

For live streams; apps such as Larix work best. 

To test your Mic-Line please watch this video:

Worship The King Mic-Line Videos:


Great Customer Videos!

Our friends over at @studioscratches have put together a nice article on "How to Record High Quality Audio Directly into Your iPhone"

PLEASE NOTE: This adapter is NOT for recording from microphones. Please see our "Dynamic Mic to Smartphone" or "ECM Mic to Smartphone" adapters for these purposes. Also, sound input for smartphone connections is mono but most apps split the sound into left and right channels for playback in both ears. You are able to input stereo sound; however, playback will only be in the left ear.

Attenuation: -20 dBV
Male End: 3.5 mm (1/8)
Female End: 3.5 mm (1/8)
Cable Length: 12"


Q: Will this adapter work with a stereo audio source?

A: The combined headset jack on the iPhone and other devices only has a mono mic input so you cannot record in stereo. Most recording apps split the mono signal into both left/right channels when recording so the audio will play back in both ears. You can connect a stereo signal to this adapter but only the left side will be active; if you use a stereo-to-mono adapter on your input cable then it will make both left/right channels combined and active. There is a new stereo microphone product available which will allow for stereo recording using the docking connector; this is currently the only option available for stereo recording, Tascam IM2 stereo mic.
Q: When I open Facebook Live my audio defaults to iPhone mic instead of Mic-Line, what can I do?
A: Open your Facebook Live app, then plug your lightning adapter into your phone! 

Q: Do I need a different adapter for a microphone?

A: The iPhone headset mic input is a mic-level input. The mic-level signal is much lower than a line-level signal which is used in audio outputs. This adapter has a built-in attenuator which reduces line-level signals down to mic-level signal strength. If you connect a mic to this adapter the signal would be reduced to a point that you would not be able to hear it in a recording. Use the MIC versions of this adapter for recording from microphones.

Q: Can I connect two audio sources?

A: Yes, you can use a standard 3.5mm splitter adapter to connect two audio sources which will combine the signals from both sources into this adapter. Alternately, you could use a small mixer to combine the signals from multiple sources into this adapter. or purchase our new product, the Mic-Line Plus

Q: Will this work with the latest versions of iPhone that have removed the 3.5 mm headphone jack?

A: Yes! However you will need to use either the lightning to 3.5mm adapter that came with your iPhone or purchase one of ours, which can be found here



For further information about Headset Buddy's Warranty and Shipping & Returns policies select the imbedded links

Warranty Information

Compatible Devices

iPhone 5, 5s, SE, 6, 6 Plus, 6s, 6s Plus

iPhone 7, 7s, 8 and iPhone X will need to be used with a 3.5mm to lightning adapter. Our's can be found here and here

iPad and iPod

Macbook, Macbook Air and Pro (Including 2020), Mac Mini and Pro

Android smartphones and devices

Windows phones


Compatible Audio Sources

"Line" audio such as a headphone jack on another device (smartphone, computer, etc.)

Mixers and soundboards with line-level outputs

Headphone outputs

Incompatible Devices

Older Samsung Galaxy models and the Samsung Galaxy Note 5

iPhone 4s and below

Select Motorola Droid models

Sony PSP devices

Incompatible Audio Sources

Microphone - use the microphone version adapters

Outputs that are mic-level

Zoom H2n

Product Videos


(13 reviews) Write a Review

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  • 5
    Works well

    Posted by David O Wright on 16th Jun 2022

    This allows me to connect computer audio and radio audio output 8 ohms to iPad input (about 1600 ohms?) so I can use like an external mic into TRRS input on iPad; hard to find on the Internet.

  • 5

    Posted by jasoneo on 11th Nov 2021

    Great Quality. Does exactly what it should. I'm using this to knock down an RCA line level into the mic input of an Iphone.

  • 5
    Just what I needed!

    Posted by John D. on 15th Jun 2017

    I needed to connect the line level output from a shortwave receiver to my iPad in order to receive weather fax broadcasts, and this did the trick. Thanks for making it available.

  • 5
    Work well

    Posted by BA O. on 15th Jun 2017

    Really good sound . It s work well with my iPhone

  • 5
    It did it

    Posted by steve c. on 15th Jun 2017

    worked firs time...did exactly what I wanted, send a console feed to an iPhone for web cast. I could, but I wouldn't want to make one at this price. Plus, it was the only adaptor like it I could find.

  • 5

    Posted by Georges B. on 15th Jun 2017

    The product is great. However, for multiple, SEPERATE takes, I had to unplug and plug back in each time to get my phone to recognize. However, the sound is great!

  • 3
    Good and bad

    Posted by Abraham L. on 7th Feb 2017

    I ordered it mainly for my live dj streams. Love the quality of the steaming sound. Unfortunately it worked fine for about a week and then it started cutting out. Got replaced and a week later the same thing happened to the new. Bought a third and the exact same thing happens after about a week. Loved the quality of the streaming sound but it theu just kept messing up after about a week of use.

  • 5
    works perfectly

    Posted by Laurent M. on 7th Feb 2017

    I use the Line-level Audio Adapter to stream live dj sets on my phone, listeners have complimented that the streamed audio sounds great.

  • 4
    Does what it says on the tin

    Posted by Unknown on 4th Jan 2017

    Excellent Product One problem just a little too short

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