RME ADI-2 DAC FS: restore optical input recording instead of USB loopback

scope

Confirm the model and connection

An existing USB recording setup captures computer loopback instead of the intended locked optical digital source. Optical/USB sample rates already match, driver prerequisites are met and no active unsaved session may be interrupted.

Look for: Confirm this exact setup and observation before continuing.

• If Yes, I confirm → Accept recording-source and monitoring changes?
• If No / my setup differs → Continue with source and model support
• If I cannot confirm → More information is required

• Manufacturer-documented RME ADI-2 DAC FS — official manual v34a ↗Sections5,10–12,14.1,19.4 and21.1 — ADI-2 DAC FS has local Source selection, per-output settings, volume/balance/mute, EQ, key lock, software-version readout, standby and USB buffer settings. Lowering volume retains mute, unlike many other DACs. I/O source Auto prioritises detected SPDIF. VOL encoder2press centres balance. No hardware reference-level or fixed-output increase is needed for these checks.Exact RME ADI-2 DAC FS. · Source checked 2026-11-09

record-route-consent

Accept recording-source and monitoring changes?

Turning off loopback and selecting USB Rec opt changes what applications receive; analog monitoring becomes USB playback and optical clock controls the session. Continue only after saving/stopping tasks and confirming matching sample rates, with monitoring low.

Look for: Explicit informed acceptance is required before the next action.

• If I accept these effects → Stop all audio sessions
• If No / leave this unchanged → Continue with source and model support
• If I cannot confirm → More information is required

• Manufacturer-documented RME ADI-2 DAC FS — official manual v34a ↗Sections5,10–12,14.1,19.4 and21.1 — ADI-2 DAC FS has local Source selection, per-output settings, volume/balance/mute, EQ, key lock, software-version readout, standby and USB buffer settings. Lowering volume retains mute, unlike many other DACs. I/O source Auto prioritises detected SPDIF. VOL encoder2press centres balance. No hardware reference-level or fixed-output increase is needed for these checks.Exact RME ADI-2 DAC FS. · Source checked 2026-11-09

a1

Stop all audio sessions

Stop the recorder and player; save the existing project before changing routing.

Look for: Observe the named indication or available control; stop if absent.

• If I completed this check → Disable USB loopback
• If I cannot complete this → Continue with source and model support
• If I cannot determine this → More information is required

• Manufacturer-documented RME ADI-2 DAC FS — official manual v34a ↗Sections5,10–12,14.1,19.4 and21.1 — ADI-2 DAC FS has local Source selection, per-output settings, volume/balance/mute, EQ, key lock, software-version readout, standby and USB buffer settings. Lowering volume retains mute, unlike many other DACs. I/O source Auto prioritises detected SPDIF. VOL encoder2press centres balance. No hardware reference-level or fixed-output increase is needed for these checks.Exact RME ADI-2 DAC FS. · Source checked 2026-11-09

a2

Disable USB loopback

In I/O for the current output open Settings→Loopback to USB and set OFF from a confirmed active loopback setting.

Look for: Observe the named indication or available control; stop if absent.

• If I completed this check → Select USB Rec opt
• If I cannot complete this → Continue with source and model support
• If I cannot determine this → More information is required

• Manufacturer-documented RME ADI-2 DAC FS — official manual v34a ↗Sections5,10–12,14.1,19.4 and21.1 — ADI-2 DAC FS has local Source selection, per-output settings, volume/balance/mute, EQ, key lock, software-version readout, standby and USB buffer settings. Lowering volume retains mute, unlike many other DACs. I/O source Auto prioritises detected SPDIF. VOL encoder2press centres balance. No hardware reference-level or fixed-output increase is needed for these checks.Exact RME ADI-2 DAC FS. · Source checked 2026-11-09

a3

Select USB Rec opt

Set I/O→Source to USB(Rec opt.) only with the already-connected optical source locked and USB playback rate positively matching it.

Look for: Observe the named indication or available control; stop if absent.

• If I completed this check → Check the intended input meter
• If I cannot complete this → Continue with source and model support
• If I cannot determine this → More information is required

• Manufacturer-documented RME ADI-2 DAC FS — official manual v34a ↗Sections5,10–12,14.1,19.4 and21.1 — ADI-2 DAC FS has local Source selection, per-output settings, volume/balance/mute, EQ, key lock, software-version readout, standby and USB buffer settings. Lowering volume retains mute, unlike many other DACs. I/O source Auto prioritises detected SPDIF. VOL encoder2press centres balance. No hardware reference-level or fixed-output increase is needed for these checks.Exact RME ADI-2 DAC FS. · Source checked 2026-11-09

a4

Check the intended input meter

In the existing recorder observe the optical source input meter at safe monitoring level without starting a new recording until the route is confirmed.

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 RME ADI-2 DAC FS — official manual v34a ↗Sections5,10–12,14.1,19.4 and21.1 — ADI-2 DAC FS has local Source selection, per-output settings, volume/balance/mute, EQ, key lock, software-version readout, standby and USB buffer settings. Lowering volume retains mute, unlike many other DACs. I/O source Auto prioritises detected SPDIF. VOL encoder2press centres balance. No hardware reference-level or fixed-output increase is needed for these checks.Exact RME ADI-2 DAC FS. · Source checked 2026-11-09

observe

Check the result

Does the recorder input now meter the intended optical source rather than the former USB playback?

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 RME ADI-2 DAC FS — official manual v34a ↗Sections5,10–12,14.1,19.4 and21.1 — ADI-2 DAC FS has local Source selection, per-output settings, volume/balance/mute, EQ, key lock, software-version readout, standby and USB buffer settings. Lowering volume retains mute, unlike many other DACs. I/O source Auto prioritises detected SPDIF. VOL encoder2press centres balance. No hardware reference-level or fixed-output increase is needed for these checks.Exact RME ADI-2 DAC FS. · 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.