The Universal Audio Volt 476 is a 4-in/4-out USB audio interface for a home studio that records a voice or guitar alongside synths and sound modules. Two front combo inputs each have a Vintage preamp, inspired by UA's 610 tube preamp, and an analog 76 Compressor based on UA's 1176 Limiting Amplifier. Two more line inputs on the back take keyboards or other line-level gear, and four line outputs sit beside the monitor outputs. Conversion runs at up to 24-bit/192 kHz.

Inputs and Analog Processing

Inputs 1 and 2 accept a microphone, a line source or an instrument, with 55 dB of gain, an INST button for guitar or bass and 48 V phantom power shared by both XLR inputs. The 76 Compressor presets, all at 6:1, cover smooth vocals (VOC), guitar and bass with longer sustain (GTR) and fast, aggressive compression (FAST). Line inputs 3 and 4 are balanced 1/4" jacks with no gain controls, so any level adjustment happens in your software.

Monitoring and Outputs

Four Monitor Source buttons choose what reaches the speakers and headphones: inputs 1-2, inputs 3-4, computer outputs 1-2 and computer outputs 3-4, so you can hear the inputs, the computer or both. A Mono button centers the direct inputs. Line outputs 1-4 carry unattenuated audio straight from your software, and outputs 3-4 can be assigned for extra monitoring. Volt 476 runs from the included power supply.

Features

• 4-in/4-out USB audio interface: two XLR/TRS combo inputs plus two 1/4" line inputs
• Two Vintage Mic Preamps, analog circuits inspired by the UA 610 tube preamp
• Two analog 76 Compressors based on the UA 1176, with VOC, GTR and FAST presets
• 24-bit/192 kHz conversion
• 48 V phantom power and INST buttons for guitar or bass
• Monitor Source buttons for inputs 1-2, inputs 3-4 and computer outputs 1-2 and 3-4, with a Mono button
• Four balanced line outputs plus stereo monitor outputs
• Headphone output with its own volume control
• MIDI in and out on 5-pin DIN
• Included external power supply
• Works with macOS, Windows, iPad and iPhone
• LUNA recording software and UAD plug-ins included: UA 610 Tube Preamp & EQ Collection, UA 1176 Classic FET Compressor, Teletronix LA-2A Tube Compressor, Century Tube Channel Strip, Pure Plate Reverb, Vibe Analog Machines Essentials, UAD Showtime '64 Tube Amp and PolyMAX Synth, plus third-party titles

Specifications

• Simultaneous I/O: 4-in/4-out
• Inputs: 2 XLR/TRS combo (mic, line, instrument), 2 x 1/4" TRS line inputs (3-4)
• Outputs: 2 x 1/4" monitor outputs, 4 x 1/4" line outputs, 1 x 1/4" stereo headphone output
• Conversion: 24-bit, 44.1, 48, 88.2, 96, 176.4 and 192 kHz
• 76 Compressor presets: VOC (2 ms attack, 300 ms release), GTR (1.5 ms attack, 700 ms release), FAST (30 µs attack, 35 ms release), all at 6:1
• Mic inputs: 55 dB gain, -127 dBu EIN (A-weighted), 112 dB dynamic range, 9 dBu maximum, 3 kilohms
• Instrument inputs: 1/4" TS, 1 megohm, 12.5 dBu maximum
• Line inputs 1-2: 1/4" TRS balanced, 15 kilohms, 22 dBu maximum
• Line inputs 3-4: 1/4" TRS balanced, 10 kilohms, 18 dBu maximum
• Monitor and line outputs: 1/4" TRS balanced, 15 dBu maximum, 110 dB dynamic range
• Headphone output: 84 mW per channel into 32 ohms, 22 mW into 300 ohms
• Frequency response: 20 Hz to 20 kHz, ±0.1 dB (mic input)
• MIDI: In and out, 5-pin DIN
• Computer connection: USB 2.0 on a USB-C connector
• Power: Included 5 VDC power supply, center-positive barrel (5.5 mm OD, 2.1 mm ID); 4.9 W typical
• System requirements: macOS 10.15 or later, Windows 10 or 11 (64-bit), iOS and iPadOS 14 or later; Intel, AMD or Apple silicon
• Dimensions: 8.4 x 5.2 x 2.6 in (21.2 x 13.2 x 6.6 cm)
• Weight: 2.0 lbs (0.92 kg)

In the Box

• Universal Audio Volt 476 USB audio interface
• USB-A to USB-C cable
• External power supply with AC adapter kit