Sound Devices Astral ARX8 firmware v8.20

Sound Devices · Released Oct 2, 2025 · First seen Jul 20, 2026

v8.20 is not the latest firmware for the Sound Devices Astral ARX8: the current version is v8.40 (August 18, 2026). Go to v8.40

What's in this update

New

New firmware update menu includes the abi​lity to wirelessly update Astral transmitter firmware.

Ability to abort wireless pairing and exit the TX List’s wireless pairing screen.

Added Frequency Exclusion Regions – the ability to exclude specified frequency ranges from the AutoAssign and manual assign process.

Added TV Channel Finder algorithm for detecting and displaying 6, 7, or 8 MHz TV channels in the RTSA and Scan Views.

Added new Whip Antenna Length tool. Select a frequency range to display a real size graphic to assist in cutting whip antennas to the correct length.

Normal + Peak Hold and Average + Peak Hold added to the RTSA Trace Type option list.

1RX View > Audio Outs > Aux On/Off toggle can now override/disable the TX Aux On state.

75-ohm termination switch added to the Timecode menu. This applies to rear panel LTC/WCK BNC input.

Added a loss of Network connection notification to OLEDs.

Changes

Main Menu icon color changes for consistency across all Astral Receivers and web apps.

Astral TX or Astral HH transmitter control button option ‘GPIO’ has been changed to ‘Control’. The Control option can be used to trigger Macros.

Fixes

RF History now runs in the background – it no longer resets when switching views.

Improved audio performance at the edge of RF range and better interference resistance

Fixed inaccurate RF History duration and accuracy.

T&M modulation high-frequency phase drift no longer occurs.

Added missing Sca​n Width button to Scan view.

BNC sync input would not always lock to external word clock, is now fixed.

Fixes issue where USB thumb drive formatting would not always work.

NexLink re-connection and stability improvements.

Firmware Update Guide (HTML) Firmware Update Guide (PDF)

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Other versions for this product

See the full firmware history for the Astral ARX8