Audio Fix / setup help

Questyle M15i: check host detection and USB output selection

check host detection and USB output selection. Exact Questyle M15i, one compatible headphone attached to one output, the supplied appropriate data cable in use and host volume low.

Manufacturer-documented Reviewed 2026-11-10 · Revision 1

Follow these checks in Audio Fix →

When this guide applies

Exact Questyle M15i, one compatible headphone attached to one output, the supplied appropriate data cable in use and host volume low.

Connection scope: USB audio. Symptom: There is no playback sound.

This is a documented check, not a diagnosis of your equipment. The model name does not confirm the selected input, mode, software or connected partner.

If your exact model or a required setting is unknown, use the “I don’t know” branch below. Do not apply a similarly named model’s instructions.

What owners have reported

These are public, self-reported experiences. They help explain the order of checks and the limits of a guide. They are not controlled tests, proof of a cause, a success rate or a substitute for the manufacturer instructions above.

User-reported User-reported — M15i behaviour differed with a Roon ARC USB-driver setting

In January–February 2025 an owner using M15i with Android 15 reported choppy playback with Roon ARC’s beta USB driver, while ordinary Android audio and an iPhone behaved differently.

How this informs the checks: Keeps host detection, app behaviour and hardware diagnosis separate. No beta-driver toggle, reset or third-party installation is prescribed.

Limits: Historical app/OS-specific report, not proof that current ARC or every M15i has the same issue. Other participants use different DACs. No current firmware defect or driver cure is established.

Read the original public discussion ↗ · Reviewed 2026-11-10

Checks and possible outcomes

Start at scope. Follow the link that matches what you actually observe. Alternative branches are not a single sequence of actions.

scope

Confirm the exact setup

Exact Questyle M15i, one compatible headphone attached to one output, the supplied appropriate data cable in use and host volume low.

Look for: Confirm the stated setup or visible result. Stop if it is unknown.

  • Manufacturer-documented Questyle M15i — manufacturer instructions ↗Original multilingual manual, English Product Instructions on PDF p.1 (visually read) — Use the appropriate included adapter/data cable and one matching headphone plug. The manual says the unit’s lights illuminate after recognising an inserted headphone. Do not judge detection using an empty headphone socket. On a USB-C phone confirm its documented OTG setting where required. On a Lightning iPhone the manual specifies the separate Questyle LTC02 Lightning-to-Type-C cable; an arbitrary charging lead is not equivalent. On a computer choose M15i as its USB audio output, then play a familiar quiet file. If the device is absent, do not install unrelated drivers or raise the volume.Exact models: Questyle M15i. Follow only the cited role and variant; successor models are excluded. · Source checked 2026-11-10

a1

Confirm the data path and headphone detection

Use the appropriate included adapter/data cable and one matching headphone plug. The manual says the unit’s lights illuminate after recognising an inserted headphone. Do not judge detection using an empty headphone socket.

Look for: The headphone is attached and the device’s detection indication is observed.

  • Manufacturer-documented Questyle M15i — manufacturer instructions ↗Original multilingual manual, English Product Instructions on PDF p.1 (visually read) — Use the appropriate included adapter/data cable and one matching headphone plug. The manual says the unit’s lights illuminate after recognising an inserted headphone. Do not judge detection using an empty headphone socket. On a USB-C phone confirm its documented OTG setting where required. On a Lightning iPhone the manual specifies the separate Questyle LTC02 Lightning-to-Type-C cable; an arbitrary charging lead is not equivalent. On a computer choose M15i as its USB audio output, then play a familiar quiet file. If the device is absent, do not install unrelated drivers or raise the volume.Exact models: Questyle M15i. Follow only the cited role and variant; successor models are excluded. · Source checked 2026-11-10

a2

Check host USB audio support

On a USB-C phone confirm its documented OTG setting where required. On a Lightning iPhone the manual specifies the separate Questyle LTC02 Lightning-to-Type-C cable; an arbitrary charging lead is not equivalent.

Look for: The actual host connector and required data role are known.

  • Manufacturer-documented Questyle M15i — manufacturer instructions ↗Original multilingual manual, English Product Instructions on PDF p.1 (visually read) — Use the appropriate included adapter/data cable and one matching headphone plug. The manual says the unit’s lights illuminate after recognising an inserted headphone. Do not judge detection using an empty headphone socket. On a USB-C phone confirm its documented OTG setting where required. On a Lightning iPhone the manual specifies the separate Questyle LTC02 Lightning-to-Type-C cable; an arbitrary charging lead is not equivalent. On a computer choose M15i as its USB audio output, then play a familiar quiet file. If the device is absent, do not install unrelated drivers or raise the volume.Exact models: Questyle M15i. Follow only the cited role and variant; successor models are excluded. · Source checked 2026-11-10

a3

Select the detected output

On a computer choose M15i as its USB audio output, then play a familiar quiet file. If the device is absent, do not install unrelated drivers or raise the volume.

Look for: The selected output and actual playback are recorded.

  • Manufacturer-documented Questyle M15i — manufacturer instructions ↗Original multilingual manual, English Product Instructions on PDF p.1 (visually read) — Use the appropriate included adapter/data cable and one matching headphone plug. The manual says the unit’s lights illuminate after recognising an inserted headphone. Do not judge detection using an empty headphone socket. On a USB-C phone confirm its documented OTG setting where required. On a Lightning iPhone the manual specifies the separate Questyle LTC02 Lightning-to-Type-C cable; an arbitrary charging lead is not equivalent. On a computer choose M15i as its USB audio output, then play a familiar quiet file. If the device is absent, do not install unrelated drivers or raise the volume.Exact models: Questyle M15i. Follow only the cited role and variant; successor models are excluded. · Source checked 2026-11-10

result

Check the actual result

Is M15i recognised as the host’s output and does the known file play quietly?

Look for: Confirm the stated setup or visible result. Stop if it is unknown.

  • Manufacturer-documented Questyle M15i — manufacturer instructions ↗Original multilingual manual, English Product Instructions on PDF p.1 (visually read) — Use the appropriate included adapter/data cable and one matching headphone plug. The manual says the unit’s lights illuminate after recognising an inserted headphone. Do not judge detection using an empty headphone socket. On a USB-C phone confirm its documented OTG setting where required. On a Lightning iPhone the manual specifies the separate Questyle LTC02 Lightning-to-Type-C cable; an arbitrary charging lead is not equivalent. On a computer choose M15i as its USB audio output, then play a familiar quiet file. If the device is absent, do not install unrelated drivers or raise the volume.Exact models: Questyle M15i. Follow only the cited role and variant; successor models are excluded. · Source checked 2026-11-10

Possible result

Checks completed — report the actual outcome

The stated observation was confirmed in this setup. Completion is not an automatic Solved report, a hardware diagnosis or a physical Audio Review test.

steps completed

Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

    Possible result

    Keep the observation for support

    Record the exact model, source, connection and last visible result. Do not reset equipment, open its chassis, bypass protective limits or install firmware to compensate for an unconfirmed result.

    next support

    Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

      Possible result

      Confirm the unknown detail first

      An unknown indication is not a diagnosis. Check the exact instructions or ask the manufacturer before continuing.

      insufficient data

      Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

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