Audio Fix / setup help
FiiO K13 R2R: choose another already-connected digital source
FiiO K13 R2R — choose another already-connected digital source. Use the stated exact hardware and connection scope.
Manufacturer-documented Reviewed 2026-11-09 · Revision 1
Follow these checks in Audio Fix →When this guide applies
Exact FiiO K13 R2R. The current K13 R2R source actively works; another intended digital/BT source is already correctly connected. Front headphones are the only used output.
Connection scope: USB audio · Optical digital audio · Bluetooth. Symptom: Switching between devices isn’t working.
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.
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 model and connection
The current K13 R2R source actively works; another intended digital/BT source is already correctly connected. Front headphones are the only used output.
Look for: Confirm this exact setup and observation before continuing.
- If Yes, I confirm → Accept interrupting the current source?
- If No / my setup differs → Continue with source and model support
- If I cannot confirm → More information is required
- Manufacturer-documented FiiO K13 R2R — official operation ↗Separate knobs, menu editing, soft power, SAM and DSD — K13 R2R menu-knob hold 2s enters settings; rotate then short-press edits/confirm. Separate volume knob handles volume/soft power. In DSD1BIT mode SAM is disabled and NOS is used for PCM and DSD; D2P allows SAM selection.Exact FiiO K13 R2R. · Source checked 2026-11-09
switch-consent
Accept interrupting the current source?
Changing input interrupts media. Continue only outside calls/recordings and with agreement to pause and reduce headphone volume first.
Look for: Explicit informed acceptance is required before the next action.
- If I accept these effects → Pause both sources
- If No / leave this unchanged → Continue with source and model support
- If I cannot confirm → More information is required
- Manufacturer-documented FiiO K13 R2R — official operation ↗Separate knobs, menu editing, soft power, SAM and DSD — K13 R2R menu-knob hold 2s enters settings; rotate then short-press edits/confirm. Separate volume knob handles volume/soft power. In DSD1BIT mode SAM is disabled and NOS is used for PCM and DSD; D2P allows SAM selection.Exact FiiO K13 R2R. · Source checked 2026-11-09
a1
Pause both sources
Pause the actively connected current source and destination media.
Look for: Observe the named indication or available control; stop if absent.
- If I completed this check → Lower headphone volume
- If I cannot complete this → Continue with source and model support
- If I cannot determine this → More information is required
- Manufacturer-documented FiiO K13 R2R — official operation ↗Separate knobs, menu editing, soft power, SAM and DSD — K13 R2R menu-knob hold 2s enters settings; rotate then short-press edits/confirm. Separate volume knob handles volume/soft power. In DSD1BIT mode SAM is disabled and NOS is used for PCM and DSD; D2P allows SAM selection.Exact FiiO K13 R2R. · Source checked 2026-11-09
a2
Lower headphone volume
Use the separate volume knob to reduce the headphone level; keep rear outputs unused.
Look for: Observe the named indication or available control; stop if absent.
- If I completed this check → Choose the intended input
- If I cannot complete this → Continue with source and model support
- If I cannot determine this → More information is required
- Manufacturer-documented FiiO K13 R2R — official operation ↗Separate knobs, menu editing, soft power, SAM and DSD — K13 R2R menu-knob hold 2s enters settings; rotate then short-press edits/confirm. Separate volume knob handles volume/soft power. In DSD1BIT mode SAM is disabled and NOS is used for PCM and DSD; D2P allows SAM selection.Exact FiiO K13 R2R. · Source checked 2026-11-09
a3
Choose the intended input
Rotate the menu knob on the homepage to USB IN, OPT IN or BT IN matching the actual already-connected source, then short-press to confirm. BT must already be paired/connected.
Look for: Observe the named indication or available control; stop if absent.
- If I completed this check → Compare quietly
- If I cannot complete this → Continue with source and model support
- If I cannot determine this → More information is required
- Manufacturer-documented FiiO K13 R2R — official operation ↗Separate knobs, menu editing, soft power, SAM and DSD — K13 R2R menu-knob hold 2s enters settings; rotate then short-press edits/confirm. Separate volume knob handles volume/soft power. In DSD1BIT mode SAM is disabled and NOS is used for PCM and DSD; D2P allows SAM selection.Exact FiiO K13 R2R. · Source checked 2026-11-09
a4
Compare quietly
Check the displayed destination and resume quiet media without changing output mode.
Look for: Observe the named indication or available control; stop if absent.
- If I completed this check → Check the result
- If I cannot complete this → Continue with source and model support
- If I cannot determine this → More information is required
- Manufacturer-documented FiiO K13 R2R — official operation ↗Separate knobs, menu editing, soft power, SAM and DSD — K13 R2R menu-knob hold 2s enters settings; rotate then short-press edits/confirm. Separate volume knob handles volume/soft power. In DSD1BIT mode SAM is disabled and NOS is used for PCM and DSD; D2P allows SAM selection.Exact FiiO K13 R2R. · Source checked 2026-11-09
observe
Check the result
Does the displayed input match the intended source and play its media quietly?
Look for: Confirm this exact setup and observation before continuing.
- If Yes, I confirm → Checks completed
- If No / my setup differs → Continue with source and model support
- If I cannot confirm → More information is required
- Manufacturer-documented FiiO K13 R2R — official operation ↗Separate knobs, menu editing, soft power, SAM and DSD — K13 R2R menu-knob hold 2s enters settings; rotate then short-press edits/confirm. Separate volume knob handles volume/soft power. In DSD1BIT mode SAM is disabled and NOS is used for PCM and DSD; D2P allows SAM selection.Exact FiiO K13 R2R. · Source checked 2026-11-09
Possible result
More information is required
An unknown state is not a diagnosis. Record the last visible indication and consult the exact model instructions.
insufficient data
Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.
Possible result
Continue with source and model support
Keep the source, connection and last observation. Do not reset, open equipment or change full-scale output 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
Checks completed
The requested observation was confirmed in this setup. It does not establish a hardware repair or guarantee another source behaves the same.
steps completed
Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.