Audient is a British audio equipment manufacturer known for producing high-quality audio interfaces, preamps, and other studio equipment. Their audio interfaces are popular among musicians, producers, and audio engineers for their excellent sound quality and robust build. Here are some of the notable Audient audio interfaces:

1. Audient iD4: The Audient iD4 is a compact and portable audio interface designed for musicians and content creators. It features a single Class-A microphone preamp, a DI input for instruments, and an excellent digital-to-analog converter (DAC) for high-quality audio recording and playback.

2. Audient iD14: The iD14 is a step up from the iD4 and features two Class-A microphone preamps, making it suitable for recording multiple sources simultaneously. It also has ADAT connectivity for expanding the input count.

3. Audient iD22: The iD22 is a more advanced audio interface with two microphone preamps, ADAT and SPDIF digital connectivity, and additional line-level inputs and outputs. It's a versatile choice for recording both instruments and vocals.

4. Audient iD44: The iD44 is a higher-end interface with four Class-A microphone preamps and extensive I/O options, making it ideal for larger recording setups. It also features two headphone outputs, talkback functionality, and flexible monitor control.