Audio Fix / setup help

PreSonus Quantum ES 2: route a desktop source into a supported Loopback recording input

PreSonus Quantum ES 2 — route a desktop source into a supported Loopback recording input. Confirm the actual setup and observed response before reporting an outcome.

Manufacturer-documented Reviewed 2026-11-09 · Revision 1

Follow these checks in Audio Fix →

When this guide applies

Windows/macOS loopback with a supported application and sample rate; no mobile loopback claim.

Connection scope: USB audio. Symptom: Recording or direct monitoring is not 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 step-0. Follow the link that matches what you actually observe. Alternative branches are not a single sequence of actions.

step-0

Is this a supported Windows/macOS application that exposes the Quantum Loopback inputs?

Unknown application multichannel support or mobile capture stops here.

Look for: Confirm the stated setup or observation. Unknown stops safely.

  • Manufacturer-documented PreSonus Quantum ES 2 official manual ↗PDF pages 14, 15 — Loopback records a combined virtual stream using Loopback 1/2 input and corresponding mixer send. It is disabled at 176.4/192 kHz. The recording channel must be muted before record-enable to prevent feedback.Desktop inter-application recording only, not analogue mic gain or monitoring repair. · Source checked 2026-11-09

step-1

Is the active sample rate below the excluded 176.4/192 kHz rates?

This flow does not change project sample rate or convert existing media.

Look for: Confirm the stated setup or observation. Unknown stops safely.

  • Manufacturer-documented PreSonus Quantum ES 2 official manual ↗PDF pages 14, 15 — Loopback records a combined virtual stream using Loopback 1/2 input and corresponding mixer send. It is disabled at 176.4/192 kHz. The recording channel must be muted before record-enable to prevent feedback.Desktop inter-application recording only, not analogue mic gain or monitoring repair. · Source checked 2026-11-09

step-2

May a deliberate test recording be made without capturing private or unapproved source audio?

Only the intended source should be included, and the receiving track must not feed itself back.

Look for: Confirm the stated setup or observation. Unknown stops safely.

  • Manufacturer-documented PreSonus Quantum ES 2 official manual ↗PDF pages 14, 15 — Loopback records a combined virtual stream using Loopback 1/2 input and corresponding mixer send. It is disabled at 176.4/192 kHz. The recording channel must be muted before record-enable to prevent feedback.Desktop inter-application recording only, not analogue mic gain or monitoring repair. · Source checked 2026-11-09

step-3

Mute the receiving application channel before any record-enable

Keep its software monitoring disabled to prevent a feedback loop.

Look for: Perform only the stated operation and confirm whether it was possible.

  • Manufacturer-documented PreSonus Quantum ES 2 official manual ↗PDF pages 14, 15 — Loopback records a combined virtual stream using Loopback 1/2 input and corresponding mixer send. It is disabled at 176.4/192 kHz. The recording channel must be muted before record-enable to prevent feedback.Desktop inter-application recording only, not analogue mic gain or monitoring repair. · Source checked 2026-11-09

step-4

Select Quantum ES as desktop playback device using the host documented control

Playback routing changes; keep levels low and other sessions idle.

Look for: Perform only the stated operation and confirm whether it was possible.

  • Manufacturer-documented PreSonus Quantum ES 2 official manual ↗PDF pages 14, 15 — Loopback records a combined virtual stream using Loopback 1/2 input and corresponding mixer send. It is disabled at 176.4/192 kHz. The recording channel must be muted before record-enable to prevent feedback.Desktop inter-application recording only, not analogue mic gain or monitoring repair. · Source checked 2026-11-09

step-5

Select the intended Loopback 1 or Loopback 2 application input

Use the matching actual input exposed by the compatible software.

Look for: Perform only the stated operation and confirm whether it was possible.

  • Manufacturer-documented PreSonus Quantum ES 2 official manual ↗PDF pages 14, 15 — Loopback records a combined virtual stream using Loopback 1/2 input and corresponding mixer send. It is disabled at 176.4/192 kHz. The recording channel must be muted before record-enable to prevent feedback.Desktop inter-application recording only, not analogue mic gain or monitoring repair. · Source checked 2026-11-09

step-6

Adjust the corresponding Loopback send in Universal Control to a modest test level

Do not send the receiving track output back into the same stream.

Look for: Perform only the stated operation and confirm whether it was possible.

  • Manufacturer-documented PreSonus Quantum ES 2 official manual ↗PDF pages 14, 15 — Loopback records a combined virtual stream using Loopback 1/2 input and corresponding mixer send. It is disabled at 176.4/192 kHz. The recording channel must be muted before record-enable to prevent feedback.Desktop inter-application recording only, not analogue mic gain or monitoring repair. · Source checked 2026-11-09

step-7

Does the receiving channel meter show only the intended source safely?

Metering is not proof of a saved recording; report the real capture outcome separately.

Look for: Confirm the stated setup or observation. Unknown stops safely.

  • Manufacturer-documented PreSonus Quantum ES 2 official manual ↗PDF pages 14, 15 — Loopback records a combined virtual stream using Loopback 1/2 input and corresponding mixer send. It is disabled at 176.4/192 kHz. The recording channel must be muted before record-enable to prevent feedback.Desktop inter-application recording only, not analogue mic gain or monitoring repair. · Source checked 2026-11-09

Possible result

Checks completed — report what happened

Completion is not an automatic solved result. Report your actual outcome; no Audio Review physical test or measured repair is claimed.

steps completed

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

    Possible result

    Stop and retain the actual observations

    A required fact or response was not confirmed. Consult the exact product/partner documentation or official support. Do not escalate to a reset, update installation, internal repair or unsafe wiring change.

    next support

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

      Possible result

      A required fact is unknown

      Confirm the actual model, source, partner capability and current state before continuing. Do not guess a menu or interrupt a live session/update.

      insufficient data

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

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