Io 4K Plus offers the latest video I/O for your computer and offers a full set of professional video and audio connectivity with support for the latest 4K/UltraHD devices, High Frame Rate (HFR), High Dynamic Range (HDR), and deep color workflows. The power of Thunderbolt 3 (and Thunderbolt 4 compatible) enables the Io 4K Plus to handle a wide range of formats from SD to HD, UltraHD, up to full 4K with frame rates up to 60p over both 12G-SDI and HDMI 2.0 with single cable simplicity, plus HDR support over both HDMI and SDI supporting HDR workflows.

Features

• 4K/UltraHD/2K/HD/SD 10-bit I/O up to 50/60p
• 4K/UltraHD HDMI 2.0 I/O with 8-channel embedded audio
• 4x SDI BNC ports and configuration options 
• 4x HD/SD 3G/1.5G bidirectional
• 1x 4K/UltraHD single link 12G/6G input (SDI 1) and 1x 4K/UltraHD single link 12G/6G output (SDI 3)
• 2x 4K/UltraHD dual link 3G/1.5G (1x input channel and 1x output channel, 2x input channels, or 2x output channels)
• 1x 4K/UltraHD four link 3G/1.5G input or output, Quadrant or 2SI 
• Dedicated SDI HD/SD Monitor Output: 4K video is down-converted to 2K and UltraHD is down-converted to HD 
• 2x Thunderbolt 3  (Thunderbolt 4 compatible) ports with loop through 
• RGB 4:4:4 12-bit, YCbCr 4:2:2 10-bit and HFR workflows supported 
• 12-bit and 10-bit LUT support (.cube)
• 4K Closed Captioning support 
• VPID signaling for SDR/HDR Transfer Characteristics, Colorimetry, and Luminance via SDI
• PQ, HLG, HDR10 and Dolby Vision support 
• HDR Metadata Capture and Auto Playback Detection
• Analog Audio flexibility with a choice of 8-channel In or 8-channel Out or 4-channel In and 4-channel Out 
• Includes support for Apple silicon
• Compatible with OBS Studio, vMix, Telestream Wirecast, Adobe Creative Suite, Apple Final Cut Pro, Avid Media Composer, and much more
• XLR 12V power for battery or AC use 
• Headphone jack and level control for mobile and live environments
• RS-422 VTR control, Reference, LTC Input

Apple silicon Support
AJA Desktop Software is optimized for the latest Apple silicon with native support for AJA macOS drivers, application plug-ins, AJA Control Room, AJA Control Panel, and AJA System Test.

Apple Mac Pro Compatible
AJA offers full compatibility for the new Apple Mac Pro, including support for AJA Control Room with Metal compatibility, as well as, extensive support for a range of applications. For productions handling high resolution workflows all the way up to 4K, Io 4K Plus is a perfect companion with the Mac Pro Thunderbolt 3 (and Thunderbolt 4 compatible) 12G-SDI and HDMI 2.0 capture and playback.

Professional Connectivity: 12G-SDI and HDMI 2.0
Today's workflows demand speed, bandwidth, and simplicity. Io 4K Plus supports 4K, UltraHD, 12G/6G/3G/1.5G-SDI, Dual Link SDI, HD-SDI, and SD-SDI, as well as, UltraHD and HD over HDMI 2.0 for both capture and output. The HDMI output is also able to accurately display HDR 10 and HLG to support HDR workflows.

12G-SDI and HDMI 2.0 bring power and simplicity to your projects with the ability to use single cables for both input and output for the most demanding workflows. 12G-SDI is backward compatible with SDI sources, covering all your bases through a single port. HDMI 2.0 allows high raster and frame rate capture and the ability to display the same to affordable and beautiful HDMI 2.0 displays.

4K Closed Captioning Support
AJA Control Room: Supports CEA-608 or 608-in-708 via ANC extraction firmware

Avid & Adobe Plugins:
All SMPTE-291 (ANC) based captions supported. Adobe Premiere supports native 708 if the raw data is available. For instance, in the Adobe plug-ins, we handle the case where Premiere hands us full 708 data, we just pass it through to the device. Avid Media Composer supports active video ANC (line 21) or ANC via ANC extractor/inserter (up to UHD/4K)

Thunderbolt Connectivity
Simple to set up and use, Io 4K Plus’ Thunderbolt 3 ports (also compatible with Thunderbolt 4) easily connect to a wide range of Apple, Windows, and Linux laptops and desktops, providing instant professional video and audio output from your favorite creative application.

Dual Thunderbolt 3 ports allow convenient daisy-chaining of other devices on the same Thunderbolt connection. Thunderbolt is ubiquitous across both Mac, Windows, and Linux computers and supports the massive bandwidth needed for professional video, audio, data, and more.

Monitor 4K/UltraHD in HD
When working at 4K resolutions, Io 4K Plus outputs a high quality HD-SDI down-converted signal on a dedicated BNC connector. This HD signal can be used to output 4K projects directly to HD recorders for broadcast and for easy viewing of 4K images on HD monitors during post production.

HDR
HDR or High Dynamic Range, provides the ability to display a wider and richer range of colors, much brighter whites, and much deeper, darker blacks than standard signals allow. This gives your imagery a more ‘dynamic’ look and allows for natural, true to life colors to be communicated to your audience.

Io 4K Plus provides this support for your 4K/UltraHD/2K and HD HDR pipelines to HDMI and SDI compatible displays, with HLG and HDR10 support with HDR Infoframe metadata, in accordance with HDMI 2.0a/CTA-861.3 and HD.

AJA Control Room software and Io 4K Plus add support for HDR metadata capture from an incoming SDI or HDMI signal. The captured .mov video file will have embedded HDR metadata, allowing the file to be played back at its intended dynamic range.

AJA Control Room software and Io 4K Plus also provide HDR Auto Playback Detection. Embedded HDR metadata in a recorded .mov file, is read and used to automatically set the HDR format on the monitor(s) connected to the AJA HDMI and/or SDI outputs.

Support for file-based .mov HDR outputs with metadata from Adobe Premiere Pro / Adobe Media Encoder HDR files is also available. Screening those rendered outputs is a simple and high-quality experience with AJA Control Room. Every frame is presented in its full quality, at the timing intended, and with the proper HDR format set correctly and automatically.

AJA Desktop Software also offers HDR input from HDMI 2.0 for capturing HDR gaming content from PlayStation 5 and PlayStation 5 Pro and more.

Workflow
Connect your digital sources via 12G-SDI to Io 4K Plus for capture to a wide variety of formats. Monitor via HDMI 2.0 output (HDR10, HLG, Dolby Vision*) and master to destinations using high quality professional SDI outputs, machine control, and analog or tri-level reference.

*Dolby Vision integration is available when using the AJA SDK.

Integrated Digital Audio, Analog Audio Flexibility
Embedded 16-channel SDI and 8-channel HDMI audio are supported, as well as, analog audio inputs, outputs, or both via a standard DB-25 connection.

Stereo monitoring is also possible with a front panel mini-TRS headphone jack. With AJA Desktop software analog audio can be configured for flexibility when needing to record voiceovers and more with the ability to choose how the DB-25 connection on Io 4K Plus is configured:

8-channel, 24 and 16-bit D/A analog audio, 48 kHz sample rate, balanced, using industry standard 8x XLR on DB-25 breakout cable (cable not included)
Balanced Analog Audio I/O:
Input across Ch. 1-8, Ch. 1-4, or Ch. 5-8
Output across Ch. 1-8, Ch. 1-4, or Ch. 5-8

AR Support with Unreal Engine 
Capture real time footage with Io 4K Plus over SDI from high quality cameras, meld your footage with your virtual environment created by the Unreal Engine and send it back out in real time to air, a growing need for broadcasters, augmented reality (AR) needs and more.

Digital filmmakers also benefit from these new workflows: On-set, enhance your live action VFX work with the ability to see a full composite live during the course of the shoot. This results in fewer reshoots, and the ability for actors to understand the virtual environment they are working within for stronger performances and ultimately leads to a range of efficiencies and cost savings with the added benefit of a smoother transition into postproduction.

Sync Up
Io 4K Plus can be locked to an external reference for integration into larger productions, or feed LTC in and out to ensure footage captured with Io 4K has the proper timecode.

Machine Control
An RS-422 port allows control of tape decks for frame accurate captures and layoffs.

Io 4K Plus Operating Systems Compatibilities
Macs with Intel processors or Apple silicon running macOS 13.x (Ventura) or later. It also supports older versions of macOS with Intel processors, from macOS 11.x (Big Sur). Hardware must have support for Thunderbolt 3 or later.
Windows 11, 10, and updates.
Linux Ubuntu 20.04 LTS and Ubuntu 22.04 LTS and Rocky Linux versions 8.5 to 8.9 and 9.0 to 9.3.

Extensive Software Support
AJA hardware is supported by an extensive list of professional software for editing, visual effects, graphics, and more allowing the same AJA device to be used by many different applications on the same system. In addition, AJA provides several free applications that enable you to utilize the power of your AJA hardware even without having to run a particular software package. This allows you to create unique workflows without tying up valuable resources unnecessarily.

Tech Specs

Video Formats
(4K) 4096 x 2160p 23.98, 24, 25, 29.97, 30, 47.95, 48, 50, 59.94, 60
(UltraHD) 3840 x 2160p 23.98, 24, 25, 29.97, 30, 50, 59.94, 60
(2K) 2048 x 1080p 23.98, 24, 25, 29.97, 30, 47.95, 48, 50, 59.94, 60
(2K) 2048 x 1080PsF 23.98, 24, 25
(HD) 1080p 23.98, 24, 25, 29.97, 30, 50, 59.94, 60
(HD) 1080PsF 23.98, 24, 25, 29.97, 30
(HD) 1080i 50, 59.94, 60
(HD) 720p 50, 59.94, 60
(SD) 625i 50
(SD) 525i 59.94
Note: High Frame Rate capabilities are dependent on host system attributes. Not all systems and configurations will support all frame rates.

Video Input Digital
12G-SDI, SMPTE-2082, 12-bit*, 10-bit
6G-SDI, SMPTE-2081, 10-bit
3G-SDI, SMPTE 425: RGB 4:4:4 12-bit*, YCbCr 4:2:2 10-bit 
1.5G-SDI, SMPTE 292M: Single Link HD-SDI YCbCr 4:2:2 10-bit , Dual Link RGB 4:4:4 12-bit*, Dual Link YCbCr 4:2:2 10-bit 
270 Mbps SDI, SMPTE 259M-C: YCbCr 4:2:2 10-bit, 8-bit 
HDMI v2.0: 30/36-bits/pixel, RGB or YUV, 6 Gbps per color component , 4K, UltraHD, 2K, HD, and SD with HFR support up to 60p (4:2:2), 10-bit

4x SDI BNC ports and configuration options: 
4x HD/SD 3G/1.5G bidirectional
1x 4K/UltraHD single-link 12G/6G input (SDI 1) and one 4K/UltraHD single-link 12G/6G output (SDI 3)
2x 4K/UltraHD dual-link 3G/1.5G (one input channel & one output channel, two input channels, or two output channels)
1x 4K/UltraHD four-link 3G/1.5G input or output, Quadrant or 2SI
*Bit depth support is application dependent. Check with your software manufacturer for compatibility.

Video Output Digital
12G-SDI, SMPTE-2082, 12-bit*, 10-bit
6G-SDI, SMPTE-2081, 10-bit
3G-SDI, SMPTE 425: RGB 4:4:4 12-bit*, YCbCr 4:2:2 10-bit 
1.5G-SDI, SMPTE 292M: Single Link HD-SDI YCbCr 4:2:2 10-bit , Dual Link RGB 4:4:4 12-bit*, Dual Link YCbCr 4:2:2 10-bit 
270 Mbps SDI, SMPTE 259M-C: YCbCr 4:2:2 10-bit, 8-bit 
HDMI v2.0: 30/36-bits/pixel, RGB or YUV, 6 Gbps per color component , 4K, UltraHD, 2K, HD, and SD with HFR support up to 60p (4:2:2), 10-bit

4x SDI BNC ports and configuration options: 
4x HD/SD 3G/1.5G bidirectional
1x 4K/UltraHD single-link 12G/6G output (SDI 3)
2x 4K/UltraHD dual-link 3G/1.5G (one input channel & one output channel, two input channels, or two output channels)
1x 4K/UltraHD four-link 3G/1.5G input or output, Quadrant or 2SI
*Bit depth support is application dependent. Check with your software manufacturer for compatibility.

HDR
SDI: VPID signaling for SDR/HDR Transfer Characteristics, Colorimetry and Luminance 
HDMI: HDR10 Support - HDR Infoframe metadata, compatible with HDMI 2.0a/CTA-861.3
HDMI: HLG Support - compatible with HDMI 2.0b/CTA-861-G
Note: HDR support is application dependent. Check with your software manufacturer for compatibility.

Audio Inputs Digital
16-channel, 24 and 16-bit SDI embedded audio, 48 kHz sample rate, synchronous
8-channel, 24 and 16-bit HDMI embedded audio, 48 kHz sample rate, synchronous

Audio Inputs Analog
8-channel, 24 and 16-bit D/A analog audio, 48 kHz sample rate, balanced, using industry standard 8x XLR on DB-25 breakout cable (cable not included)
+24 dBu full scale digital (0 dBFS)
+/- 0.2 dB 20 to 20 kHz frequency response
Input supported across Ch 1-8, Ch 1-4, or Ch 5-8 depending on configuration chosen

Audio Outputs Digital
16-channel, 24-bit SDI embedded audio, 48 kHz sample rate, synchronous
8-channel, 24-bit HDMI embedded audio, 48 kHz sample rate, synchronous

Audio Outputs Analog
8-channel, 24-bit D/A analog audio, 48 kHz sample rate, balanced, using industry standard 8x XLR on DB-25 breakout cable (cable not included)
+24 dBu full scale digital (0 dBFS)
+/- 0.2 dB 20 to 20 kHz frequency response
Output supported across Ch 1-8, Ch 1-4, or Ch 5-8 depending on configuration chosen

Downstream Keyer
Supports graphics up to 2K/HD with alpha channel over video, matte or framebuffer, or framebuffer content over incoming video or matte

Down-Conversion 4K/UltraHD
Real time, dedicated 4K down-conversion output (1x BNC)
4K to 2K down-conversion
UltraHD to HD down-conversion

Reference and LTC I/O
1x BNC LTC output
1x BNC assignable to Reference video or LTC input

Reference
Analog Color Black (1V) or Composite Sync (2 or 4V) or HD Tri-Level Sync (1V)
Reference input is terminated into 75 ohms when Genlock is set to Ref In

Electrical Interface
Thunderbolt 3 (2x)

Machine Control
RS-422, Sony 9-pin protocol
9-pin D-connector pinout is as follows:
Shell: GND
1: GND
2: RX-
3: TX+
4: GND
5: No Connection
6: GND
7: RX+
8: TX-
9: GND

Size (w x d x h): 8.74” x 8.11” x 1.65” (222.0 x 206.0 x 41.9 mm)
Weight: 3.4 lbs (1.6 kg)
Power (device only): 10-20V, 30W typical, 36W max, 70W max with USB-C power delivery to external devices

Environment
Safe Operating Temperature Range: 0 to 40 C (32 to 104 F)
Safe Storage Temperature (Power OFF): -40 to 60 C (-40 to 140 F)
Operating Relative Humidity: 10-90% noncondensing
Operating Altitude: <3,000 meters (<10,000 feet)