AUDIO4c Audio + MIDI Interface for Streaming, Live Performance

In this review the AUDIO4c emerges as a versatile all-in-one interface aimed at streamers, live performers and home studio owners who need flexible routing between multiple computers and devices. The single biggest reason to consider it is its multi-host and passThru capabilities that let two computers or a computer and a mobile device share audio and MIDI digitally, which simplifies hybrid streaming, recording and live setups. The reviewer found the unit especially useful when juggling a streaming computer and a performance laptop or a tablet for backing tracks.

Key Features

• Multi-host Device ports: lets you connect up to two computer devices simultaneously so streaming and performance workflows can run on separate machines without constant replugging.
• Audio and MIDI passThru: routes audio and MIDI digitally between two computing devices to keep signals clean and latency low when sharing sources.
• Comprehensive routing: provides flexible mixing between USB computing devices and the analog outputs so feeds can be created for stream, monitor and FOH independently.
• Standalone operation: can run without a computer to mix and host class-compliant MIDI devices, useful for compact live rigs or onstage setups.
• High-resolution audio: 24-bit/96kHz AD/DA conversion preserves detail when recording or streaming higher-fidelity sources.
• Generous analog I/O: four XLR / 1/4in combo inputs with four quality mic preamps and 48V phantom plus multiple balanced outputs for monitors and submixer feeds.

Who It's For

The AUDIO4c is well suited to content creators who stream live musical performances, engineers who need to split duties between a recording computer and a streaming machine, and gigging musicians who want a compact interface that also manages MIDI routing. Its multi-host and passThru features are particularly valuable for users who run separate systems for performance and broadcast.

Those who primarily need a simple two-in/two-out interface for basic podcasting or solo tracking with minimal routing may find the AUDIO4c more feature-rich than necessary; likewise, if ultra-high channel counts or dedicated DSP effects are essential, a larger studio console-style interface would be a better fit.

Pros & Cons

Pros

• Flexible multi-host connectivity that streamlines dual-computer workflows.
• Robust routing and mixing between USB devices and analog outputs for complex setups.
• Standalone operation and multiple MIDI port types increase live usability and device compatibility.
• High-resolution AD/DA and four mic pres with phantom power for quality recording.

Cons

• The feature set and routing complexity may be unnecessary for users with very simple I/O needs.
• The physical layout and learning curve for advanced routing could require time to master for some users.

Specifications

Channels	4 XLR / 1/4in combo inputs; 4 mic preamps
Analog Outputs	4 balanced 1/4in TRS outputs
Audio Resolution	Up to 24-bit / 96kHz AD/DA
MIDI	Computer MIDI, 5-pin DIN-MIDI and USB class-compliant MIDI
Multi-host	Supports up to two computer devices (Mac/Windows/iOS/Android)
Controls	Capacitive touch user controls

Our Verdict

The AUDIO4c is a strong choice for streamers, performers and hybrid studio users who need flexible multi-host audio and MIDI routing without carrying multiple boxes. Its combination of high-resolution audio, four quality mic pres, standalone mixing and multi-platform support delivers excellent value for those who will use the routing and passThru features; casual users with minimal I/O needs might be better served by a simpler interface.

Frequently Asked Questions

Can the AUDIO4c connect to two computers at once?
The unit supports multi-host connections and can be used with two computer devices simultaneously for shared audio and MIDI routing.

Does it work with mobile devices?
Yes, the interface supports Mac, Windows, iOS and Android devices and offers class-compliant USB-MIDI for mobile setups.

Can it operate without a computer?
Yes, AUDIO4c can run in standalone mode to mix and route audio and host class-compliant MIDI devices without a connected computer.