Sony ECM-W5 Wireless Microphone System Announced – 32-Bit Float via MI Shoe, 64GB Backup Recording, Timecode

Wireless Audio

by Johnnie BehiriToday

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Sony has introduced the ECM-W5, a two-transmitter, one-receiver wireless microphone system that sends 32-bit float audio digitally into compatible Sony cameras through the Multi Interface (MI) Shoe. Each transmitter records an internal backup to up to 64GB of storage, the system supports timecode and up to four channels, and the kit costs $399.99.

Sony’s previous wireless systems, the ECM-W3 and ECM-W3S, also mount on the MI Shoe, and the company compares the new system directly with the ECM-W3. We have covered Sony’s compact audio accessories before, from the ECM-W2BT wireless microphone and ECM-LV1 lavalier to the recent ECM-AX10 spatial audio microphone for smartphones. The ECM-W5 moves Sony’s camera-mounted wireless line closer to the feature set of third-party systems such as the Hollyland LARK MAX 2, with 32-bit float, onboard recording and timecode in one kit. Let’s take a closer look.

32-bit float into the camera file

The main feature of the ECM-W5 is its digital connection to the camera. According to Sony, the receiver sends 32-bit float audio through the MI Shoe to a compatible camera, which records it in the same file as the video. No external recorder is necessary, and there is no separate audio file to sync in post.

The system also supports 96kHz High-Resolution Audio recording with a compatible camera. Sony notes that 32-bit float reduces the need to adjust gain during a take and helps prevent clipping in the recording. The company also states that clipping at the microphone input stage cannot be corrected later by changing the volume in editing.

Sony’s list of compatible cameras can be found here: ECM-W5 compatibility page. For now, this page is showing that the full list of compatible cameras is coming soon.

Backup recording on the transmitters

Each ECM-W5T transmitter has up to 64GB of built-in storage for backup recording. Sony lists a capacity of up to 90 hours at 32-bit float/48kHz, or up to 60 hours at 24-bit/96kHz.

The backup keeps a copy of the source audio on the transmitter if the wireless link drops or the camera recording has a problem. For interviews and documentary work where a take cannot be repeated, this gives a second recording that does not depend on the radio connection.

Range, stability and latency

Sony quotes a line-of-sight range of up to 500m / 1,640ft, measured with the transmitter visible from the receiver. Obstacles, reflective surfaces and radio conditions reduce this distance. The company says the ECM-W5 is designed to reduce dropouts in congested RF environments, and claims transmission that is approximately three times more stable than the ECM-W3, based on Sony’s internal measurement conditions.

Low-latency transmission is also part of the specification. Sony positions this for real-time applications such as live streaming, but does not give a latency figure in the press material.

Four channels and timecode

The kit includes two transmitters and one receiver. The transmitters and the receiver are also sold separately, and Sony says the supplied transmitters can be combined with additional ECM-W5T units. This allows up to four channels of in-camera recording, for panels, multi-person interviews and events. Four-channel recording therefore needs two extra transmitters on top of the kit.

The system supports timecode. According to Sony, this simplifies synchronization across multiple cameras and audio recordings and reduces manual alignment in post-production. The press material does not describe how timecode is set or jammed between units.

Inputs, power and connectivity

Each transmitter has a 3.5mm input for lavalier and external microphones, including Sony’s separately sold ECM-L1 lavalier. Images of the receiver show a display, a control dial, AUDIO IN and MIC OUT jacks, and a headphone output.

On compatible cameras, the receiver gets power through the MI Shoe and supports linked power control with the camera. A supplied USB Type-C adapter connects the receiver to smartphones and computers that support USB Audio Class 2.0. The transmitters can also connect directly to a device via Bluetooth for wireless recording, with interoperability that varies by device.

Sony lists up to 11 hours of operating time for the transmitters. The system ships in a charging case, and Sony describes the design as dust- and moisture-resistant, while stating that it is not guaranteed to be fully dust- and moisture-proof.

Monitoring with Sony headphones

The ECM-W5 works with compatible Sony wireless headphones for monitoring without a cable. Sony does not name the models in the press material and refers to a list of compatible headphones on its website.

Price and availability

The Sony ECM-W5 kit with two transmitters and one receiver costs $399.99 in the US and CA$569.99 in Canada. The ECM-W5R receiver costs $189.99 / CA$269.99, and a single ECM-W5T transmitter costs $119.99 / CA$169.99. Pre-orders are open now, and Sony expects all three products to ship in November 2026. For more information, please visit the Sony website.

Would you record 32-bit float straight into your camera file, or do you still prefer a dedicated recorder for your interviews? Don’t hesitate to let us know in the comments below!