QRP Labs QMX firmware `v1_00_012`

QRP Labs · Released Dec 5, 2023 · First seen Sep 7, 2026

v1_00_012 is not the latest firmware for the QRP Labs QMX: the current version is v1_04_015 (September 24, 2026). Go to v1_04_015

What's in this update

Fix to volume control erratic behavior.
Prevent audio over-drive causing sudden distortion.
Add "Audio" menu.
Adjustable audio gain in steps of 0.25, 0.5, 1, 2 or 4 dB.
Sidetone volume can be applied absolutely or relative to audio volume.
Adjustable sidetone volume works properly.
Bug fix: There was silence if you started up on 80m band.
Bug fix: Custom splash screen is now working.
CAT command MD now sets/returns 9 for FSR (FSK Reverse) in LSB & Digi mode
CAT command FW now returns 3200 when in Digi mode (FSK)
CAT command AG now operates consistent with TS-480 documentation (AG; still works too)

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