As noted in other posts here and in the QMX user manual ... for Linux-type computer
(such as the Raspberry Pi), it's something like "click on the speaker icon in the tray
(or whatever you need to do with Raspbi to find something like "Sound Settings" ...
that's what it's called on my Linux Mint machine), then locate the QMX output
sound device, and then set its volume to maximum."
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I had exactly that symptom (two dots under the A) and finding and setting to maximum
of the QMX sound output device was the cure.
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- Bruce K1FFX
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