Sound Devices Astral TX
firmware v8.40
Sound Devices · Released Aug 18, 2026 · First seen Aug 19, 2026
v8.40 is the latest firmware for the Sound Devices Astral TX, released August 18, 2026.
In short — summary by updatemystuff.com
Dynamic font sizing for transmitter names and battery percentage now displayed.
- Dynamic font sizing optimizes transmitter name display on e-paper
- Battery remaining percentage display restored
- Voltage displays when batteries are hot-swapped
Written from Sound Devices's release notes, which are printed in full below.
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What's in this update
New
Added dynamic font sizing for transmitter names on the e-paper display. Shorter names now appear larger and make better use of available display area.
Fixes
Astral TX now shows battery remaining %. Voltage is displayed if batteries are hot-swapped.
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