Audio Interface and Signal Flow Flashcards

You hear a loud hum in your recording that changes when you touch the guitar strings. What is the likely cause?

Answer: A ground loop or grounding issue in the signal path

Hum that changes with grounding contact typically indicates a ground loop or shielding problem.

What is the safest order for powering up a studio to avoid speaker pops?

Answer: Power sources and interface first, then turn on monitors last

Powering monitors last prevents the turn-on transient from the rest of the chain reaching the speakers.

A reamp box is used to do what in a signal chain?

Answer: Convert a line-level recorded signal back to instrument level for an amp

A reamp box matches level and impedance so a recorded DI track can be sent through a guitar amp.

A DI (direct injection) box primarily serves what purpose?

Answer: Convert a high-impedance unbalanced instrument signal to balanced mic level

A DI box converts a high-impedance instrument signal into a balanced low-impedance signal suitable for a mic input.

Your interface offers both USB and Thunderbolt versions. Why might Thunderbolt be preferred for live tracking?

Answer: It typically provides lower and more stable latency

Thunderbolt generally delivers lower, more consistent latency, which helps when monitoring while recording.

What is the function of the monitor/headphone mix knob found on many interfaces?

Answer: To blend the direct input signal with playback from the computer

The mix knob balances zero-latency input monitoring against the DAW playback in your headphones.

If a balanced cable is wired with reversed polarity on one channel of a stereo pair, what symptom appears?

Answer: Phase cancellation, causing weak or hollow center sound

Reversed polarity on one channel causes phase cancellation that thins out the centered signal.