Audio Fix / setup help
Sony ULT WEAR: check LDAC and two-device mode
Check source support and the exact ULT mode restriction before choosing codec settings.
Manufacturer-documented Reviewed 2026-11-09 · Revision 1
Follow these checks in Audio Fix →When this guide applies
Exact WH-ULT900N/ULT WEAR Bluetooth music. Turning off two-device mode is an intentional tradeoff, not a repair. No active codec or source-specific menu is inferred.
Connection scope: Bluetooth. Symptom: An option or codec is missing.
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 ULT WEAR LDAC setting report on a phone
The owner reports AAC remaining active despite app settings, then says a source Bluetooth LDAC switch suggested in a reply appeared to help.
How this informs the checks: Separate source LDAC support and actual codec from the headset feature list; use official source-specific instructions for source settings.
Limits: Anecdotal result on a named phone without a complete OS/firmware record. The source menu is not generalized to other phones or computers.
Read the original public discussion ↗ · Reviewed 2026-11-09
Checks and possible outcomes
Start at source. Follow the link that matches what you actually observe. Alternative branches are not a single sequence of actions.
source
Does the source explicitly document LDAC support?
Check its exact model and OS. An omitted specification is unknown.
Look for: Choose only the observation you can confirm.
- If LDAC support is confirmed → Is Connect to 2 devices simultaneously enabled?
- If The source explicitly says LDAC is unsupported → LDAC also needs a capable source
- If I don’t know / could not check → A required observation is missing
- Manufacturer-documented Cannot play audio with the LDAC codec ↗Source prerequisite; Sound Connect quality and codec check — An LDAC-capable source is required. The support article documents selecting sound-quality priority and checking the displayed codec in Sound Connect.General Sony LDAC instructions displayed in ULT WEAR support context. Source-specific codec menus must be checked against the actual source; no universal developer-options recipe is supplied. · Source checked 2026-11-09
two
Is Connect to 2 devices simultaneously enabled?
Read the actual ULT setting in the Sony app.
Look for: Choose only the observation you can confirm.
- If It is on → Do you prefer LDAC to two-device use for this check?
- If It is off → Choose sound-quality priority
- If I don’t know / could not check → A required observation is missing
- Manufacturer-documented ULT WEAR: Connecting the headset to 2 devices simultaneously ↗Connection setup; playback handover; LDAC note — The app enables two-device mode; the model guide requires stopping the first playback before starting the second. With this setting on, LDAC is unavailable and AAC or SBC is used.Exact ULT WEAR model. The model guide governs this procedure; a generic newer Sony article describes different handover behavior and is not treated as an undocumented ULT update. · Source checked 2026-11-09
choice
Do you prefer LDAC to two-device use for this check?
The ULT model guide says LDAC cannot run with the two-device setting enabled.
Look for: Choose only the observation you can confirm.
- If Use single-device mode for LDAC → Turn off the two-device setting
- If Keep two-device operation → Two-device mode excludes LDAC on ULT WEAR
- If I don’t know / could not check → A required observation is missing
- Manufacturer-documented ULT WEAR: Connecting the headset to 2 devices simultaneously ↗Connection setup; playback handover; LDAC note — The app enables two-device mode; the model guide requires stopping the first playback before starting the second. With this setting on, LDAC is unavailable and AAC or SBC is used.Exact ULT WEAR model. The model guide governs this procedure; a generic newer Sony article describes different handover behavior and is not treated as an undocumented ULT update. · Source checked 2026-11-09
off
Turn off the two-device setting
Disable Connect to 2 devices simultaneously deliberately.
Look for: The control is off; simultaneous two-source operation is no longer the chosen mode.
- If I completed this check → Choose sound-quality priority
- If I cannot follow this step → Continue with model-specific support
- If I don’t know / could not check → A required observation is missing
- Manufacturer-documented ULT WEAR: Connecting the headset to 2 devices simultaneously ↗Connection setup; playback handover; LDAC note — The app enables two-device mode; the model guide requires stopping the first playback before starting the second. With this setting on, LDAC is unavailable and AAC or SBC is used.Exact ULT WEAR model. The model guide governs this procedure; a generic newer Sony article describes different handover behavior and is not treated as an undocumented ULT update. · Source checked 2026-11-09
quality
Choose sound-quality priority
In Sound Connect, open All device settings > Connection and select Prioritize Sound Quality.
Look for: The quality preference is selected.
- If I completed this check → Does Sound Connect confirm LDAC?
- If I cannot follow this step → Continue with model-specific support
- If I don’t know / could not check → A required observation is missing
- Manufacturer-documented Cannot play audio with the LDAC codec ↗Source prerequisite; Sound Connect quality and codec check — An LDAC-capable source is required. The support article documents selecting sound-quality priority and checking the displayed codec in Sound Connect.General Sony LDAC instructions displayed in ULT WEAR support context. Source-specific codec menus must be checked against the actual source; no universal developer-options recipe is supplied. · Source checked 2026-11-09
codec
Does Sound Connect confirm LDAC?
Inspect the codec indication below the model name during playback. The setting alone is not confirmation.
Look for: Choose only the observation you can confirm.
- If LDAC is shown → Checks completed — report your outcome
- If A different codec is still shown → Continue with model-specific support
- If I don’t know / could not check → A required observation is missing
- Manufacturer-documented Cannot play audio with the LDAC codec ↗Source prerequisite; Sound Connect quality and codec check — An LDAC-capable source is required. The support article documents selecting sound-quality priority and checking the displayed codec in Sound Connect.General Sony LDAC instructions displayed in ULT WEAR support context. Source-specific codec menus must be checked against the actual source; no universal developer-options recipe is supplied. · Source checked 2026-11-09
Possible result
LDAC also needs a capable source
ULT WEAR cannot add LDAC transmission to a source that does not support it.
documented limitation
Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.
- Manufacturer-documented Cannot play audio with the LDAC codec ↗Source prerequisite; Sound Connect quality and codec check — An LDAC-capable source is required. The support article documents selecting sound-quality priority and checking the displayed codec in Sound Connect.General Sony LDAC instructions displayed in ULT WEAR support context. Source-specific codec menus must be checked against the actual source; no universal developer-options recipe is supplied. · Source checked 2026-11-09
Possible result
Two-device mode excludes LDAC on ULT WEAR
The model Help Guide documents AAC or SBC with two-device operation enabled.
documented limitation
Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.
- Manufacturer-documented ULT WEAR: Connecting the headset to 2 devices simultaneously ↗Connection setup; playback handover; LDAC note — The app enables two-device mode; the model guide requires stopping the first playback before starting the second. With this setting on, LDAC is unavailable and AAC or SBC is used.Exact ULT WEAR model. The model guide governs this procedure; a generic newer Sony article describes different handover behavior and is not treated as an undocumented ULT update. · Source checked 2026-11-09
Possible result
Checks completed — report your outcome
Reaching this screen does not itself mean the problem is solved. Report what happened in your own setup.
steps completed
Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.
Possible result
A required observation is missing
Do not guess a model, menu or version. Consult the linked instructions for the exact source and headset. An omitted specification remains unknown.
insufficient data
Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.
Possible result
Continue with model-specific support
These checks have not established a working setup or a particular cause. Give the manufacturer the exact models, versions and last observation. Do not repeatedly reset or replace equipment based on this result.
next support
Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.