Sony XLR-A4 adds 32-bit float XLR audio to Alpha cameras

Sony has launched the XLR-A4, a shoe-mounted audio unit for compatible Alpha bodies. It sits on the Multi Interface Shoe and lets XLR microphones connect directly to the camera. It launched together with the Alpha 7R VI, and the a7 V supports it through firmware 2.00.

Recording features

• 96 kHz/32-bit float recording on supported cameras.
• A dual ADC design: two converters work at different gain levels to widen dynamic range.
• 4-channel audio input, for example for several speakers or safety channels at different gain.
• Separate 32-bit float WAV files saved inside the camera.

Connections and power

For inputs there are two 3-pin XLR/TRS combo sockets that supply 48V phantom power, plus a single stereo mini-jack input. A microphone holder is built into the unit, and its side panel has gain dials, switches for auto or manual level, attenuation and low-cut controls. The unit draws power from the camera through the shoe, with no cable between them.

Via the shoe connection the unit sends either two analog channels or four digital ones. A USB connection carries two digital channels, and when used with a computer it tops out at 96 kHz/24-bit. The adapter weighs 198 g and measures 113.2 x 99.8 x 80 mm. No microphone is included.

Limits

The full 32-bit float mode depends on the camera. Bodies that lack 96 kHz/32-bit float support get a ceiling of 48 kHz/24-bit, still with four input channels. Sony adds that a signal which has already clipped at the mic input cannot be restored by the float format.

Price and availability

The XLR-A4 costs $778 (€636.04). It is open for pre-order, with shipping expected in early June. For comparison, compact 32-bit float recorders such as the Zoom F3 and H6essential are listed at around $329.99, and the Deity PR-4 at $449. Those recorders work across camera systems but produce separate files on a separate device.