RME Babyface Pro FS: Reference-Grade Portable Recording

The RME Babyface Pro FS is a bus-powered USB 2.0 audio interface that delivers 24 channels of I/O and reference-class conversion in an aluminum body small enough for a laptop bag. It combines two digitally controlled 76 dB microphone preamps, XLR and 1/4-inch analog I/O, optical ADAT and SPDIF, and RME's flagship SteadyClock FS timing in a single unit weighing under a pound. Where most portable interfaces compromise on converters or drivers, the Babyface Pro FS carries the same clocking pedigree as RME's ADI-2 Pro and the company's famously stable driver suite. For the engineer who records on location one day and mixes critically the next, it removes the usual trade-off between portability and fidelity. It is a full RME studio you can hold in one hand.

Two Reference 76 dB Microphone Preamps

Each of the two microphone inputs runs through a digitally controlled preamp offering a wide 76 dB gain range in precise 1 dB steps, with a relay-driven pad for hot sources. Digitally controlled gain means both channels recall identically and step in exact increments, which matters when matching a stereo pair or documenting a session for later recall. The preamps are quiet and clean enough to handle low-output ribbon and dynamic microphones without an external booster, while switchable 48V phantom power feeds condensers. Combined with 24-bit conversion at up to 192 kHz, these inputs capture vocals, acoustic instruments, and amplifiers with transparent detail.

24 Channels of Analog and Expandable Optical I/O

The Babyface Pro FS carries 24 inputs and 24 outputs total: two XLR mic inputs, two 1/4-inch TS instrument and line inputs, two balanced XLR line outputs, and an optical TOSLINK port that runs ADAT or SPDIF. The optical connection adds up to eight more channels through an external ADAT converter, which is how a compact two-preamp interface expands to track a full drum kit or a bank of outboard preamps. ADAT is an optical protocol that multiplexes eight channels of audio down one cable, and SMUX doubles the sample rate by halving the channel count. That mix of analog and expandable optical I/O lets the interface grow with a session rather than capping it.

SteadyClock FS Femtosecond Timing

SteadyClock FS is RME's femtosecond-grade clock, a jitter-reduction system inherited from the ADI-2 Pro that stabilizes the interface's internal timing to an extremely low noise floor. Clock jitter is tiny timing error in the digital sampling process, and reducing it sharpens stereo imaging and lowers distortion in the converters. Because SteadyClock FS regenerates a clean clock even from a jittery external source, the Babyface Pro FS stays sonically consistent whether it runs on its own clock or locks to another device. For critical listening and mastering-grade work, that timing precision is a large part of why RME converters are trusted references.

TotalMix FX Onboard DSP Mixer

TotalMix FX is RME's onboard DSP mixer and router, giving the Babyface Pro FS a full digital mixing console that runs on the interface hardware rather than the computer's CPU. It provides near-zero-latency monitoring, so a performer hears themselves the instant they play, plus a three-band parametric EQ, dynamics, reverb, and echo on the monitor path. Because the routing is a matrix, any input or playback channel can be sent to any output, enabling complex cue mixes, loopback for streaming, and standalone operation. Learning TotalMix takes some time, but it is what turns a small interface into a flexible studio hub.

Dual Independent Headphone Outputs

Two separate 1/4-inch headphone outputs, one high-power and one standard, let the Babyface Pro FS drive demanding studio headphones and feed a second listener at once. The high-power output has the current to control high-impedance reference headphones cleanly, while the second jack suits in-ear monitors or a guest's headphones on a different mix. Each output has its own TotalMix channel, so the engineer and the talent can monitor completely independent blends. That dual-output design is unusual on an interface this size and makes tracking sessions and collaborative listening far easier.

Bus-Powered Aluminum Build

The entire interface runs on USB 2.0 bus power, drawing everything it needs from a single cable to a laptop, with an optional 12-volt DC input for desktop use. The enclosure is milled from a solid block of aluminum with a rotary encoder and display for hands-on control of gain, monitoring, and settings without touching the computer. Measuring about 7.2 by 4.2 by 1.4 inches, it slips into a bag alongside a laptop and a couple of microphones for a complete mobile rig. That combination of bus power, rugged build, and standalone controls is what makes it a true go-anywhere interface.

Mobile, Studio, and Monitoring Applications

The Babyface Pro FS is built for mobile recording, home and project studios, podcasting and streaming, and any situation where reference monitoring must travel. On location it captures interviews, acoustic sessions, and live performances with two pristine preamps and expandable optical I/O; back at the desk it doubles as a high-end monitoring DAC for mixing and mastering decisions. Streamers and podcasters use its loopback routing to combine microphone and computer audio without extra software. For the engineer who wants one interface that is equally at home in the field and in the control room, it is a definitive choice.

**This B-Stock product has either been returned from a prior customer order or was used as a demo and repackaged. The product box may show signs of wear, and has had the manufacturer seal broken, but the product should remain in working condition. The item may show some signs of use, but it should not affect performance. All B-Stock items include the original manufacturer warranty, as we are an authorized reseller for this brand. This product is also covered under our return policy.