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September 29, 2025 16 mins

Levels mysteriously rising and falling with no changes in your setup? In this episode of The Pro Audio Suite, we go hunting for those dreaded signal-chain gremlins.

From flaky TRS connections that drop a balanced leg and cause sudden 6 dB losses, to patchbay switches that "moved themselves," to the quirks of send/return jacks on interfaces like the Audient iD series—we unpack the common culprits behind random level swings.

We also share a practical, step-by-step troubleshooting method called binary reduction: change one thing at a time, ideally from the middle of the chain, and halve your suspect list with every move.

What you'll learn:

  • Why XLR usually outperforms TRS for reliable, balanced connections

  • How to "exercise" or clean jacks to stop intermittent dropouts

  • How the Return jack on the Audient iD bypasses the preamp (and why the Send is half-normalled)

  • Why patchbays and inserts can be both lifesavers and headaches

  • The simple logic of binary reduction for solving audio mysteries fast

Mentioned: Grace m101, Audient iD22/iD44, Mackie inserts, Apogee Duet, phantom power quirks, Behringer patchbay switches.

Sponsors:

  • TriBooth — use code TRIPAP200 for USD $200 off your TriBooth

  • Austrian AudioMaking passion heard.

Credits: Recorded via Source-Connect. Edited by Andrew Peters. Mixed by Robbo. Tech support by George "The Tech" Whittam. theproaudiosuite.com

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