Audient Id4 Explained: Features, Types and Tips

What Is the Audient iD4?

The Audient iD4 is a compact 2-in/2-out USB audio interface designed around a single console-grade microphone preamp. The current model is the iD4 MKII, which uses USB-C, records up to 24-bit/96 kHz, and runs entirely from bus power. Audient is a British professional-audio company with a background in mixing consoles, and the iD4 takes the preamp architecture from that lineage and packages it into a small desktop device for home recording, podcasting and personal production.

The defining characteristic is its focus. Rather than offering multiple microphone inputs at a reduced specification, it offers one microphone preamp and one dedicated JFET instrument input, both at a quality level that competes above the entry-level tier. If you record one source at a time — vocals and guitar for a demo, voice-over for a podcast, or a single direct instrument — this approach suits you well. If you need two independent microphone channels, you need a different interface.

Audient iD4 Inputs and Outputs in Detail

The rear panel carries one XLR/TRS combination input. The XLR side connects a microphone and runs through the console preamp; the TRS side accepts a line-level source. A 48 V phantom power switch on the front panel powers condenser microphones that require it. The front panel also carries the ¼-inch JFET instrument input, designed specifically for direct connection of electric guitar or bass and optimised for the high-impedance, unbalanced signal a passive guitar pickup produces.

Both inputs are simultaneously active, which makes it a practical single-device solution for a vocalist-guitarist: microphone to the rear XLR for vocals, guitar straight into the front JFET input. The two signals appear as independent channels in your DAW. Output connections are two balanced TRS line outputs for studio monitors on the rear, plus two headphone connections on the front panel — a ¼-inch socket and a 3.5 mm socket. Both headphone outputs deliver independent monitoring from the same unit, which is useful when a performer and engineer are sitting in the same room, or when running in-ear and over-ear headphones simultaneously.

The Microphone Preamp

Audient's published technical specifications list 58 dB of microphone gain, a noise floor that independent measurement discussions have placed favourably in the compact interface category, and a dynamic range figure of up to 125.5 dB A-weighted on certain measurement paths. These are strong numbers for the price bracket. Most condenser microphones and standard dynamic microphones reach adequate recording levels without strain on the gain control.

The comparison most commonly made is with the Focusrite Scarlett 2i2, which provides two microphone preamps at a similar price. MusicRadar's head-to-head placed the Audient iD4 ahead on preamp character and console heritage, while acknowledging that the Scarlett offers two independent microphone channels — a genuine advantage when you need to record two microphone sources simultaneously. If you have never needed two microphone channels at once and are unlikely to, the preamp quality is the stronger argument. If two microphone inputs are a current or foreseeable requirement, the Scarlett 2i2 is more practically capable.

Audient iD4 Controls: ScrollControl and Monitor Mix

The large central knob on the front panel is the main output level control, but in supported software it operates as ScrollControl. With the Audient driver and software installed, the knob becomes a virtual scroll wheel and DAW parameter controller, allowing adjustment of plug-in settings, track parameters or DAW functions without reaching for the mouse. It is not a replacement for a hardware control surface, but it is a genuinely useful feature for solo recording where you are simultaneously operating the DAW and performing.

The Monitor Mix control is a blend knob between the direct input signal and computer playback. Rotating it toward the input side gives low-latency monitoring of the microphone or instrument — the signal from the input connector is heard before it reaches the DAW buffer, so there is no perceptible delay. Rotating it toward the computer side shifts the balance toward software playback, useful when monitoring backing tracks or software effects. Direct monitoring bypasses DAW plug-in processing, so any effects inserted in the DAW are not heard in direct mode.

Recording Resolution and USB-C Connection

The iD4 MKII operates at up to 24-bit/96 kHz. For the majority of home recording, podcasting and demo production use cases, 24-bit/48 kHz is entirely sufficient. The 96 kHz option is available for workflows that require a higher sample rate — certain mastering chains, specific plug-in oversampling approaches, or delivery specifications that mandate it. Audient specifies a minimum USB power draw of 0.9 A at 5 V and recommends connecting to a USB 3.0-capable port to ensure stable power delivery, particularly on laptops with USB hubs or older USB 2.0 ports that may not reliably supply the required current.

Who the Audient iD4 Suits

The Audient iD4 is the right interface for a solo musician or creator who records one input at a time, wants a high-quality microphone preamp in a bus-powered desktop device, and values the ScrollControl and Monitor Mix features for solo session management. Singer-songwriters, podcasters, voice-over artists, guitarist-producers and bedroom beatmakers who track sequentially rather than simultaneously are the core audience.

It is not the right choice for recording a live band, tracking two vocalists at once, connecting an electronic drum kit or keyboard via MIDI, or working with digital I/O such as S/PDIF or ADAT. For those requirements, Audient's own iD14 offers more inputs and connectivity, and other interfaces in the broader market address specific professional studio configurations.

Frequently Asked Questions