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Audient EVO 4 and Universal Audio Apollo Twin X DUO Gen 2: Keep one established input-monitor path

Audient EVO 4 and Universal Audio Apollo Twin X DUO Gen 2: Keep one established input-monitor path. Shared exact-model procedure, with model-specific prerequisites retained.

Manufacturer-documented Reviewed 2026-11-09 · Revision 2

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When this guide applies

EVO 4 USB direct monitoring or Apollo Twin X DUO Gen 2 Thunderbolt with UAD Console already open. Same live input also DAW-monitored; accept disabling only the duplicate. Apollo additionally requires the exact host/UAD/cable prerequisites below. Do not launch Console over unsaved hardware changes.

Connection scope: USB audio · Thunderbolt audio interface. Symptom: Sound and picture are out of sync.

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

model

Confirm which exact interface is selected

Is this the Apollo Twin X DUO Gen 2? Choose Yes for Apollo; choose No only for the selected EVO 4 with its established USB direct-monitor path.

Look for: Choose only a detail you can confirm.

  • Manufacturer-documented EVO 4 Monitoring and Output Controls | Audient Documentation ↗Monitoring and Output Controls — Output Volume selects listening level; Monitor Mix selects direct/computer balance. Headphones automatically mute rear monitors; these outputs cannot play simultaneously and share level. Direct monitoring plus DAW monitoring can double the signal.Exact model named in the retrieved manufacturer document header. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Connection Notes / Software setup, PDF p14–16 — A genuine Thunderbolt3 cable and supported Thunderbolt host are required; USB-C shape does not prove either. The supplied external power supply is required; the interface is not bus powered.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: Apollo X Series System Requirements ↗General, macOS, Windows and Additional Notes — The exact Gen 2 series requires UAD software11.5.0 minimum. Listed macOS releases are11,12,13,14,15,26; Windows11 is supported on native Thunderbolt3/4/5 Intel hosts. AMD Thunderbolt systems and Windows ARM are not supported; beta OS is excluded.Guides deliberately cover Apple Macs with native Thunderbolt3/4 or Intel Windows11 native Thunderbolt3/4/5, genuine Thunderbolt3 cable and an already supported installed UAD configuration. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Troubleshooting / Echo-phasing, PDF p34; Operational overview p9–10 — When monitoring input through UAD Console, disable DAW software input monitoring to avoid a doubled path. Console’s hardware input monitoring avoids DAW buffering.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: UAD Console Overview ↗UAD Console with DAW / Interactions — Console input monitoring replaces the DAW software input path. Disabling one prevents doubling. Launching Console can overwrite hardware-only changes, so this guide requires it already open and established.Exact Gen 2 model supports UAD Console according to hardware manual. Existing third-party DAW session, not LUNA-specific routing. · Source checked 2026-11-09

host

Confirm the supported native host

Is this an Apple-made Mac on non-beta macOS11/12/13/14/15/26 with native Thunderbolt3/4, or an Intel Windows11 PC with native Thunderbolt3/4/5? This guide does not cover AMD/ARM Windows or legacy adapters.

Look for: Choose only a detail you can confirm.

  • Manufacturer-documented EVO 4 Monitoring and Output Controls | Audient Documentation ↗Monitoring and Output Controls — Output Volume selects listening level; Monitor Mix selects direct/computer balance. Headphones automatically mute rear monitors; these outputs cannot play simultaneously and share level. Direct monitoring plus DAW monitoring can double the signal.Exact model named in the retrieved manufacturer document header. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Connection Notes / Software setup, PDF p14–16 — A genuine Thunderbolt3 cable and supported Thunderbolt host are required; USB-C shape does not prove either. The supplied external power supply is required; the interface is not bus powered.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: Apollo X Series System Requirements ↗General, macOS, Windows and Additional Notes — The exact Gen 2 series requires UAD software11.5.0 minimum. Listed macOS releases are11,12,13,14,15,26; Windows11 is supported on native Thunderbolt3/4/5 Intel hosts. AMD Thunderbolt systems and Windows ARM are not supported; beta OS is excluded.Guides deliberately cover Apple Macs with native Thunderbolt3/4 or Intel Windows11 native Thunderbolt3/4/5, genuine Thunderbolt3 cable and an already supported installed UAD configuration. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Troubleshooting / Echo-phasing, PDF p34; Operational overview p9–10 — When monitoring input through UAD Console, disable DAW software input monitoring to avoid a doubled path. Console’s hardware input monitoring avoids DAW buffering.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: UAD Console Overview ↗UAD Console with DAW / Interactions — Console input monitoring replaces the DAW software input path. Disabling one prevents doubling. Launching Console can overwrite hardware-only changes, so this guide requires it already open and established.Exact Gen 2 model supports UAD Console according to hardware manual. Existing third-party DAW session, not LUNA-specific routing. · Source checked 2026-11-09

software

Confirm the installed UAD setup

Is compatible UAD software11.5.0 or later already installed for this Gen 2, with the controls used below visibly matching your installed setup? No installation is performed here.

Look for: Choose only a detail you can confirm.

  • Manufacturer-documented EVO 4 Monitoring and Output Controls | Audient Documentation ↗Monitoring and Output Controls — Output Volume selects listening level; Monitor Mix selects direct/computer balance. Headphones automatically mute rear monitors; these outputs cannot play simultaneously and share level. Direct monitoring plus DAW monitoring can double the signal.Exact model named in the retrieved manufacturer document header. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Connection Notes / Software setup, PDF p14–16 — A genuine Thunderbolt3 cable and supported Thunderbolt host are required; USB-C shape does not prove either. The supplied external power supply is required; the interface is not bus powered.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: Apollo X Series System Requirements ↗General, macOS, Windows and Additional Notes — The exact Gen 2 series requires UAD software11.5.0 minimum. Listed macOS releases are11,12,13,14,15,26; Windows11 is supported on native Thunderbolt3/4/5 Intel hosts. AMD Thunderbolt systems and Windows ARM are not supported; beta OS is excluded.Guides deliberately cover Apple Macs with native Thunderbolt3/4 or Intel Windows11 native Thunderbolt3/4/5, genuine Thunderbolt3 cable and an already supported installed UAD configuration. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Troubleshooting / Echo-phasing, PDF p34; Operational overview p9–10 — When monitoring input through UAD Console, disable DAW software input monitoring to avoid a doubled path. Console’s hardware input monitoring avoids DAW buffering.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: UAD Console Overview ↗UAD Console with DAW / Interactions — Console input monitoring replaces the DAW software input path. Disabling one prevents doubling. Launching Console can overwrite hardware-only changes, so this guide requires it already open and established.Exact Gen 2 model supports UAD Console according to hardware manual. Existing third-party DAW session, not LUNA-specific routing. · Source checked 2026-11-09

transport

Confirm the actual data and power path

Is the already operating DUO Gen 2 connected by a manufacturer-confirmed Thunderbolt3 data cable to that native Thunderbolt port, using its supplied external power supply? USB-C shape alone is insufficient.

Look for: Choose only a detail you can confirm.

  • Manufacturer-documented EVO 4 Monitoring and Output Controls | Audient Documentation ↗Monitoring and Output Controls — Output Volume selects listening level; Monitor Mix selects direct/computer balance. Headphones automatically mute rear monitors; these outputs cannot play simultaneously and share level. Direct monitoring plus DAW monitoring can double the signal.Exact model named in the retrieved manufacturer document header. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Connection Notes / Software setup, PDF p14–16 — A genuine Thunderbolt3 cable and supported Thunderbolt host are required; USB-C shape does not prove either. The supplied external power supply is required; the interface is not bus powered.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: Apollo X Series System Requirements ↗General, macOS, Windows and Additional Notes — The exact Gen 2 series requires UAD software11.5.0 minimum. Listed macOS releases are11,12,13,14,15,26; Windows11 is supported on native Thunderbolt3/4/5 Intel hosts. AMD Thunderbolt systems and Windows ARM are not supported; beta OS is excluded.Guides deliberately cover Apple Macs with native Thunderbolt3/4 or Intel Windows11 native Thunderbolt3/4/5, genuine Thunderbolt3 cable and an already supported installed UAD configuration. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Troubleshooting / Echo-phasing, PDF p34; Operational overview p9–10 — When monitoring input through UAD Console, disable DAW software input monitoring to avoid a doubled path. Console’s hardware input monitoring avoids DAW buffering.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: UAD Console Overview ↗UAD Console with DAW / Interactions — Console input monitoring replaces the DAW software input path. Disabling one prevents doubling. Launching Console can overwrite hardware-only changes, so this guide requires it already open and established.Exact Gen 2 model supports UAD Console according to hardware manual. Existing third-party DAW session, not LUNA-specific routing. · Source checked 2026-11-09

scope

Confirm this particular symptom

Is the same live input already audible through the selected EVO 4 direct monitor or already-open Apollo UAD Console, while the DAW also monitors that input, and do you accept disabling only that duplicate?

Look for: Choose only a detail you can confirm.

  • Manufacturer-documented EVO 4 Monitoring and Output Controls | Audient Documentation ↗Monitoring and Output Controls — Output Volume selects listening level; Monitor Mix selects direct/computer balance. Headphones automatically mute rear monitors; these outputs cannot play simultaneously and share level. Direct monitoring plus DAW monitoring can double the signal.Exact model named in the retrieved manufacturer document header. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Connection Notes / Software setup, PDF p14–16 — A genuine Thunderbolt3 cable and supported Thunderbolt host are required; USB-C shape does not prove either. The supplied external power supply is required; the interface is not bus powered.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: Apollo X Series System Requirements ↗General, macOS, Windows and Additional Notes — The exact Gen 2 series requires UAD software11.5.0 minimum. Listed macOS releases are11,12,13,14,15,26; Windows11 is supported on native Thunderbolt3/4/5 Intel hosts. AMD Thunderbolt systems and Windows ARM are not supported; beta OS is excluded.Guides deliberately cover Apple Macs with native Thunderbolt3/4 or Intel Windows11 native Thunderbolt3/4/5, genuine Thunderbolt3 cable and an already supported installed UAD configuration. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Troubleshooting / Echo-phasing, PDF p34; Operational overview p9–10 — When monitoring input through UAD Console, disable DAW software input monitoring to avoid a doubled path. Console’s hardware input monitoring avoids DAW buffering.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: UAD Console Overview ↗UAD Console with DAW / Interactions — Console input monitoring replaces the DAW software input path. Disabling one prevents doubling. Launching Console can overwrite hardware-only changes, so this guide requires it already open and established.Exact Gen 2 model supports UAD Console according to hardware manual. Existing third-party DAW session, not LUNA-specific routing. · Source checked 2026-11-09

a1

Select the affected DAW input track

Select the same input track in the existing DAW. Preserve its recording input and arm state; do not launch Console or alter hardware gain.

Look for: Perform this one check and observe the actual response.

  • Manufacturer-documented EVO 4 Monitoring and Output Controls | Audient Documentation ↗Monitoring and Output Controls — Output Volume selects listening level; Monitor Mix selects direct/computer balance. Headphones automatically mute rear monitors; these outputs cannot play simultaneously and share level. Direct monitoring plus DAW monitoring can double the signal.Exact model named in the retrieved manufacturer document header. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Connection Notes / Software setup, PDF p14–16 — A genuine Thunderbolt3 cable and supported Thunderbolt host are required; USB-C shape does not prove either. The supplied external power supply is required; the interface is not bus powered.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: Apollo X Series System Requirements ↗General, macOS, Windows and Additional Notes — The exact Gen 2 series requires UAD software11.5.0 minimum. Listed macOS releases are11,12,13,14,15,26; Windows11 is supported on native Thunderbolt3/4/5 Intel hosts. AMD Thunderbolt systems and Windows ARM are not supported; beta OS is excluded.Guides deliberately cover Apple Macs with native Thunderbolt3/4 or Intel Windows11 native Thunderbolt3/4/5, genuine Thunderbolt3 cable and an already supported installed UAD configuration. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Troubleshooting / Echo-phasing, PDF p34; Operational overview p9–10 — When monitoring input through UAD Console, disable DAW software input monitoring to avoid a doubled path. Console’s hardware input monitoring avoids DAW buffering.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: UAD Console Overview ↗UAD Console with DAW / Interactions — Console input monitoring replaces the DAW software input path. Disabling one prevents doubling. Launching Console can overwrite hardware-only changes, so this guide requires it already open and established.Exact Gen 2 model supports UAD Console according to hardware manual. Existing third-party DAW session, not LUNA-specific routing. · Source checked 2026-11-09

a2

Disable only its software input monitor

Use the DAW’s documented input-monitor control to disable the known duplicate. Preserve established EVO direct monitoring or the already-open UAD Console path, according to the selected exact interface.

Look for: Perform this one check and observe the actual response.

  • Manufacturer-documented EVO 4 Monitoring and Output Controls | Audient Documentation ↗Monitoring and Output Controls — Output Volume selects listening level; Monitor Mix selects direct/computer balance. Headphones automatically mute rear monitors; these outputs cannot play simultaneously and share level. Direct monitoring plus DAW monitoring can double the signal.Exact model named in the retrieved manufacturer document header. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Connection Notes / Software setup, PDF p14–16 — A genuine Thunderbolt3 cable and supported Thunderbolt host are required; USB-C shape does not prove either. The supplied external power supply is required; the interface is not bus powered.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: Apollo X Series System Requirements ↗General, macOS, Windows and Additional Notes — The exact Gen 2 series requires UAD software11.5.0 minimum. Listed macOS releases are11,12,13,14,15,26; Windows11 is supported on native Thunderbolt3/4/5 Intel hosts. AMD Thunderbolt systems and Windows ARM are not supported; beta OS is excluded.Guides deliberately cover Apple Macs with native Thunderbolt3/4 or Intel Windows11 native Thunderbolt3/4/5, genuine Thunderbolt3 cable and an already supported installed UAD configuration. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Troubleshooting / Echo-phasing, PDF p34; Operational overview p9–10 — When monitoring input through UAD Console, disable DAW software input monitoring to avoid a doubled path. Console’s hardware input monitoring avoids DAW buffering.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: UAD Console Overview ↗UAD Console with DAW / Interactions — Console input monitoring replaces the DAW software input path. Disabling one prevents doubling. Launching Console can overwrite hardware-only changes, so this guide requires it already open and established.Exact Gen 2 model supports UAD Console according to hardware manual. Existing third-party DAW session, not LUNA-specific routing. · Source checked 2026-11-09

result

Check the actual result

With the same quiet input, has the delayed doubled/phasey monitor signal disappeared?

Look for: Choose only a detail you can confirm.

  • Manufacturer-documented EVO 4 Monitoring and Output Controls | Audient Documentation ↗Monitoring and Output Controls — Output Volume selects listening level; Monitor Mix selects direct/computer balance. Headphones automatically mute rear monitors; these outputs cannot play simultaneously and share level. Direct monitoring plus DAW monitoring can double the signal.Exact model named in the retrieved manufacturer document header. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Connection Notes / Software setup, PDF p14–16 — A genuine Thunderbolt3 cable and supported Thunderbolt host are required; USB-C shape does not prove either. The supplied external power supply is required; the interface is not bus powered.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: Apollo X Series System Requirements ↗General, macOS, Windows and Additional Notes — The exact Gen 2 series requires UAD software11.5.0 minimum. Listed macOS releases are11,12,13,14,15,26; Windows11 is supported on native Thunderbolt3/4/5 Intel hosts. AMD Thunderbolt systems and Windows ARM are not supported; beta OS is excluded.Guides deliberately cover Apple Macs with native Thunderbolt3/4 or Intel Windows11 native Thunderbolt3/4/5, genuine Thunderbolt3 cable and an already supported installed UAD configuration. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio Apollo Twin X Gen 2 Hardware Manual, 260619 ↗Troubleshooting / Echo-phasing, PDF p34; Operational overview p9–10 — When monitoring input through UAD Console, disable DAW software input monitoring to avoid a doubled path. Console’s hardware input monitoring avoids DAW buffering.Exact Apollo Twin X DUO Gen 2 Thunderbolt; not Twin X USB, Twin MkII or Gen1. · Source checked 2026-11-09
  • Manufacturer-documented Universal Audio: UAD Console Overview ↗UAD Console with DAW / Interactions — Console input monitoring replaces the DAW software input path. Disabling one prevents doubling. Launching Console can overwrite hardware-only changes, so this guide requires it already open and established.Exact Gen 2 model supports UAD Console according to hardware manual. Existing third-party DAW session, not LUNA-specific routing. · Source checked 2026-11-09

Possible result

Confirm the unknown detail before proceeding

Stop rather than infer an installed cartridge, partner, source level, cable capability, software version or control state.

insufficient data

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

    Possible result

    Keep the actual observation for support

    Record the exact model, source, connection, control state and response. These checks do not diagnose a failed component or prescribe a reset, update, internal repair or mains change.

    next support

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

      Possible result

      Keep the observed result

      This is the outcome observed in this setup, not a guaranteed cure, Audio Review physical test or measurement.

      steps completed

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

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