HUGE Spark Update + Bug Fixes

Shared by BoxCast Team • October 07, 2026

This week brings a big firmware update for Spark, plus a round of fixes across the platform.

Spark

Firmware update

Start, stop, or extend a broadcast right from Spark's screen.
Set a PIN on Spark to protect these controls from accidental or unauthorized use.
Spark local recordings now use MKV instead of MP4. MP4 recordings could drop frames, especially as broadcasts ran longer, and MKV avoids that. MKV uploads are already supported.
Added asynchronous sample rate conversion, so Spark can handle multiple asynchronous 48kHz audio sources and 44.1kHz audio over HDMI.
Reduced CPU usage.
Improved the Spark screen by using the GPU, which eliminates tearing and shuts the screen down properly when the unit powers off.
Spark now logs power sequencer faults and peaks on each boot, which helps our support team troubleshoot power issues in the field.

Bug fixes

Fixed an issue where video markers outside of a broadcast's trim range were still displayed
Fixed an issue where duplicating a broadcast didn't use the same thumbnail as the original

Improvements