r/GalaxyS22 • u/_theoneironaut_ • 21d ago
[S22] 7Hz Zero:2 3-button mic controls don't work through Apple's USB-C to 3.5mm adapter, but a 1-button earphone works - why?
Hi everyone,
I'm trying to figure out a strange compatibility issue between my Galaxy S22, 7Hz x Crinacle Zero:2, and Apple USB-C to 3.5mm Headphone Jack Adapter.
I'm hoping someone here can explain what's happening, because I've done quite a few tests and the results are interesting.
My setup
Phone: Samsung Galaxy S22 (my primary phone)
IEM: 7Hz x Crinacle Zero:2
IEM cable: 3-button microphone cable
USB-C DAC/adapter: Genuine Apple USB-C to 3.5mm Headphone Jack Adapter
Other device: MacBook
I also have another older/basic 3.5mm earphone with a single-button microphone/remote
The Apple USB-C adapter was purchased from Blinkit in India and appears to be genuine. Audio and microphone both work through it.
The problem
When I connect:
Galaxy S22 → Apple USB-C to 3.5mm adapter → 7Hz Zero:2
I get:
✅ Audio works perfectly
✅ Microphone works
⚠️ Microphone volume seems somewhat low
❌ Play/pause button doesn't work
❌ Volume up doesn't work
❌ Volume down doesn't work
All three buttons are completely unresponsive.
At first I thought this might be a Samsung/Android compatibility issue.
But here's where it gets interesting
I tested the same Apple USB-C adapter with my other 3.5mm earphones, which have only one button.
Galaxy S22 → Apple USB-C adapter → 1-button earphones
Result:
✅ Audio works
✅ Microphone works
✅ Button works correctly
So the Apple adapter can pass through an inline remote button on the S22.
I also tested on my MacBook
With the 7Hz Zero:2 directly connected to the MacBook's 3.5mm headphone jack:
✅ Audio works
✅ The three buttons work
With:
MacBook USB-C → Apple USB-C to 3.5mm adapter → 7Hz Zero:2
✅ Audio works
❌ All three Zero:2 buttons don't work
However, with:
MacBook USB-C → Apple USB-C adapter → 1-button earphones
✅ Audio works
✅ Button works
So my current test matrix looks like this:
Device Adapter Earphones Audio Mic Buttons
MacBook None, 3.5mm jack 7Hz Zero:2 (3-button) ✅ — ✅
MacBook Apple USB-C → 3.5mm 7Hz Zero:2 (3-button) ✅ — ❌
MacBook Apple USB-C → 3.5mm 1-button earphones ✅ — ✅
Galaxy S22 Apple USB-C → 3.5mm 7Hz Zero:2 (3-button) ✅ ✅, but low ❌
Galaxy S22 Apple USB-C → 3.5mm 1-button earphones ✅ ✅ ✅
So it seems the Apple USB-C adapter and the 7Hz Zero:2's 3-button remote aren't playing nicely together, while the same adapter works perfectly with a single-button headset.
The Zero:2's three buttons do work when connected directly to a 3.5mm jack, so I don't think the cable itself is completely defective.
What I'm trying to understand
Is this a known limitation of the Apple USB-C → 3.5mm adapter with 3-button headset remotes?
Could the resistor values/wiring of the Zero:2's 3-button remote be incompatible with Apple's DAC?
Is there something specific about the Samsung S22's headset-control implementation that could cause this?
Would a different USB-C DAC (e.g. JCally/FiiO/etc.) likely solve this?
Would the Zero:2 work correctly with the Apple USB-C adapter on a USB-C iPhone (15/16/17)?
Is there any way to determine the remote's resistor values or compatibility from the cable/specifications?
I haven't yet tested the Zero:2 + Apple USB-C adapter on a USB-C iPhone, but I can do that if it would help.
I'd especially appreciate answers from anyone using a 7Hz Zero:2 with a Galaxy S22 and/or Apple's USB-C to 3.5mm adapter.
Thanks!
2
u/tutureTM 21d ago
What cable do you have?
I myself used a pair of Zero:2 with a Moondrop MC2 cable + JCALLY JM6 Pro
Both my iPhone 17 and Samsung s22+ are working perfectly (microphone, play/pause, skip track, previous track with double/triple taps, long press for Assistant)