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iOS video recording with STEREO line-in audio replacing built-in mic

Discussion in 'Recording Gear and Equipment [BG]' started by OldDog52, May 13, 2018.


  1. OldDog52

    OldDog52 Gold Supporting Member

    Jan 1, 2011
    Pacific Northwest
    I never actually learned to play very well
    I did search and can't find anything relatively recent that addresses my question. Someone asked the same question in 2011 and there were no replies. Anyway, apologies in advance if this has been beaten to death already and I'm just not seeing it.

    I want to record video on my iPhone 8, but not using the phone's built-in mic. I want to record the video with the audio coming from a STEREO line level output from another device. Emphasis on STEREO line-level audio recording to accompany the video.

    I can find devices that claim to do this but they're priced around $150 and up. My requirements aren't that complicated. I could record the audio track on a computer using Audacity and sync it up to the video during editing but it's kind of a hassle.

    Mono-only adapters are about $20, but that's not what I need.

    Ideas?

    EDIT: The audio line out from the source device is unbalanced, coming from RCA jacks.
     
    Last edited: May 13, 2018
  2. OldDog52

    OldDog52 Gold Supporting Member

    Jan 1, 2011
    Pacific Northwest
    I never actually learned to play very well
    Found this at Sweetwater. Line 6 Sonic Port.

    Line 6 Sonic Port

    User review says “Sonic Port works great for adding line-in audio to an iPhone video, out of the box with no other software. Just plug it in after you start the camera app. Records stereo audio with the videos too.”

    It seems to do what I need. Might give it a go.
     
  3. filmtex

    filmtex Commercial User

    May 29, 2011
    S. Texas Hill Country
    Annsman Pro Audio Dealer
    Looks like Mitch Gallagher on that video. If Mitch said it, it’s the gospel. Think I’ll look in to one of those myself. Good find.
     
    Last edited: May 17, 2018
    OldDog52 likes this.
  4. OldDog52

    OldDog52 Gold Supporting Member

    Jan 1, 2011
    Pacific Northwest
    I never actually learned to play very well
    Ordered from Sweetwater. Amazon has it too but same price.

    I’ll report back on it here.
     
    filmtex likes this.
  5. OldDog52

    OldDog52 Gold Supporting Member

    Jan 1, 2011
    Pacific Northwest
    I never actually learned to play very well
    After a lot of trial and error (to be described in a followup post), here’s an initial somewhat successful test of the Line 6 Sonic Port capturing stereo line out audio and feeding it to an iPad Pro that’s recording the video & audio. No other editing.

    How does it sound?

     
    Last edited: May 17, 2018
  6. filmtex

    filmtex Commercial User

    May 29, 2011
    S. Texas Hill Country
    Annsman Pro Audio Dealer
    Sounds good to me.
     
  7. OldDog52

    OldDog52 Gold Supporting Member

    Jan 1, 2011
    Pacific Northwest
    I never actually learned to play very well
    Be very careful with the "free" Line 6 Mobile POD app! There is no advisory in the description about in-app purchases. The basic app is free but watch out. I consider myself fairly savvy about this stuff but somehow I accidentally made a $19.99 in-app purchase that I neither want nor need. Grrr. I had to contact Apple Support to arrange for a refund. This has never happened to me before.
     
  8. OldDog52

    OldDog52 Gold Supporting Member

    Jan 1, 2011
    Pacific Northwest
    I never actually learned to play very well
    Here's a few random notes about using the Line 6 Sonic Port to feed line-level audio an iPhone (or iPad), replacing the normal mic.

    The biggest single handicap is I can't monitor the audio using either the headphone jack on the Sonic Port, or on the iPhone. Of course my iPhone 8 doesn't even have a headphone jack, but that's a different issue, need another special cable. Anyway, the SP manual says the SP's headphone jack should work, but it's not happening for me. No output while recording. To work around that, I fed the line-level output from the source device into a simple mixer, with the output from the mixer feeding the SP. I plugged in headphones to the mixer. That works.

    The SP is powered by the i-Device's Lightning Port connected to the USB port on the SP. To get proper audio recording, I have to first launch the iDevice camera app, select Video, then plug the SP in to the Lightning port. It takes a few seconds for the SP to power up and get "synced". Then start my recording. This works without using their app.

    Well it works for my silly hobbyist purposes. :)

    Now for some Ecstatic Dance Music!

    EDIT: I just realized that without using the app, the audio is mono, not stereo. ****!!!!

    EDIT #2: I discovered I had a bad RCA to 1/8th inch stereo adapter cable. That’s why the recorded audio was mono.

     
    Last edited: May 19, 2018
  9. Primary

    Primary TB Assistant

    Here are some related products that TB members are talking about. Clicking on a product will take you to TB’s partner, Primary, where you can find links to TB discussions about these products.

     
    May 17, 2021

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