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iphone 17 pro zoom hosting a meeting where audio comes in through the usb-c via 3.5 audio source

cameopark
Newcomer
Newcomer

‎2025-10-27 10:26 AM

when hosting a zoom meeting with an iphone 17 pro and the audio is coming from the church's audio system via a 3.5 mm line, the voices are find but music cuts in an out.  I want to turn on wide spectrum on the phone but it is grayed out.  On a iphone 12 there were no problems.  I have original sound selected in zoom but I think the phone is filtering it.  Thus I want to select wide spectrum in the control panel of the phone. Any thoughts would be appreciated.

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lancetlc
Zoom Employee
Zoom Employee

‎2025-10-30 02:34 PM

Hey @cameopark,

 

Since you cannot enable Wide Spectrum, focus on disabling other automatic processing:

  1. Check for an iOS-Level "Hearing" Filter:

    • Go to Settings > Accessibility > Audio & Visual.

    • Look for a setting like "Phone Noise Cancellation" and turn it off. This is often enabled by default on iPhones and can filter out background sounds, which is what's happening to your music.

    • Also, check Headphone Accommodations in the same menu; ensure this is not on or affecting your audio.

  2. Zoom "Original Sound" Settings:

    • In the Zoom app on your iPhone, ensure you have the correct settings before joining or starting the meeting.

    • Go to Settings > Meeting > Use Original Sound. Make sure this is ON.

    • During the meeting, tap the "..." (More) in the bottom right, and look for "Enable Original Sound" (or similar phrasing) and ensure it is ON. This setting can be tricky as it often requires being turned on in two places (global settings and in-meeting toggle).

  3. Adjusting the Line-In Volume:

    • The problem could be that the church's audio system's output level is too loud for the iPhone's input (especially if you're using a simple 3.5mm adapter that expects a low-level microphone signal). A signal that's too loud can trigger the phone's limiter or automatic gain control to compress and cut the signal, leading to the music chopping out when it's louder than the voices.

    • Try lowering the volume coming out of the church's audio system into your iPhone line/adapter. The optimal signal is usually one that is strong but doesn't peak into the red.

Since the music is specifically being cut out, it is most likely the aggressive noise cancellation feature on the newer iPhone/iOS version that's triggering due to the line-in input not being recognized as a "wide-spectrum" source. Disabling Phone Noise Cancellation in Accessibility is your best immediate software fix.

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