User Manual

About SD Cards
To adjust your analog audio levels on Blackmagic Video Assist 4K, simply tap the audio meter
and then drag the sliders for each channel left or right.
About SD Cards
Choosing a Fast SD Card
It’s important to use high speed UHS-II SD cards for Ultra HD and HD recording, or UHS-1 cards
for HD recording. These cards are rated for fast data speeds and support larger storage sizes.
For Ultra HD recording on Blackmagic Video Assist 4K, you will need to use the fastest UHS-II
cards available. We have included a table below that shows the latest compatible SD cards for
recording Ultra HD, HD and SD video. It’s worth regularly checking the latest version of this
manual for more up to date information and can always be downloaded from the Blackmagic
Design website at www.blackmagicdesign.com/support
The following table contains SD cards we have tested and are able to record video up to a
given maximum format on Blackmagic Video Assist 4K.
Compatible SD Cards
Maximum Supported Format Manufacturer Model Size
Ultra HD 2160p30 Transcend SDXC UHS II 180MB/s 64GB
Lexar SDXC UHS II 2000x 300MB/s 64GB
HD 1080p60 Delkin Devices SD 633X SDHC UHS I 80MB/s 8GB
Delkin Devices SD 633X SDXC UHS I 80MB/s 16GB
Sandisk Extreme Pro UHS I 95MB/s 64GB
Lexar SDXC UHS II 1000x 150MB/s 128GB
Lexar SDXC UHS II 1000x 150MB/s 256GB
HD 1080i60 Sandisk Extreme Pro UHS II 280MB/s 64GB
Lexar SD 633x SDHC UHS I 95MB/s 32GB
All UHS-I and UHS-II SD cards should be fast enough to record compressed HD video up to 60
frames per second, however it’s worth testing your card’s record speed to be sure. You can do
this using Blackmagic Disk Speed Test software which can be downloaded from the Blackmagic
Design support center. For information on using Disk Speed Test, refer to ‘checking disk speed’
in this section of the manual.
Formatting SD Cards using your Video Assist
It’s very easy to format your SD card using the storage settings. You can format your card using
HFS+ or exFAT formats.
HFS+ is also known as Mac OS Extended. It is the recommended format as it supports
“journaling”. Data on journaled media is more recoverable and less likely to be corrupted.
HFS+is natively supported by Mac OS X.
NOTE To record audio plugged into the XLR connectors on Blackmagic Video
Assist 4K, select ‘XLR line’ or ‘XLR mic’ in the audio settings.
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