A 4‑channel USB audio interface is a device that lets you connect up to four audio inputs (e.g. microphones, instruments, line‑level sources)
Specifications
Specification / Feature
Value / Detail
Analog I/O Channels
4 inputs / 4 outputs (4‑in / 4‑out)
Mic Preamps
4 mic/line preamps with up to 56 dB gain
Input Connectors
XLR (balanced mic) + ¼” TRS (line / instrument) combo, with instrument‑level (Hi‑Z) support on some inputs.
Phantom Power
+48 V switchable (for condenser microphones)
Sample Rate & Bit Depth
Up to 192 kHz, 24‑bit audio conversion
Frequency Response (Mic / Line In)
20 Hz – 40 kHz (at 96 kHz sampling)
Signal-to-Noise Ratio (SNR)
~ 110 dB (mic input, minimal gain) – good for clean recordings.
THD + Noise (Distortion)
~ 0.0013% (mic input, at –5 dBFS) — very low distortion for clean audio.
Line Output Level / Output Connectors
Balanced ¼” TRS line outputs; nominal +4 dBu, max +20 dBu.
Headphone Output
Stereo ¼” headphone out; ~ 45 mW per channel (into 32 Ω), suitable for studio headphones.
Direct Monitoring / Low Latency
“Zero‑latency” direct monitoring (hardware based) — ideal for live recording / tracking.
Additional I/O
2 × headphone outs; 4 analog outs; MIDI In/Out (on some models), making the interface versatile beyond just audio.
Power & Connectivity
USB‑C (USB 2.0 High Speed) to computer; can be powered via USB or dedicated AC adapter.
