On Tue, 2 Jun 2020 10:57:00 -0400
Bob Goodwin <bobgood...@fastmail.us> wrote:

> On 2020-06-01 06:45, Bob Goodwin wrote:

> Well, I still have this annoying problem but after my effort
> yesterday it appears there was a few errors in my description.
> 
> The Thunderbird notification does not use aplay, it just gets the
> file and path: "file:///home/bobg/apps/audio/login.wav"
> And when J aplay that same file PSvolume does not show the metering
> bar, it is only showing in text that it is "Playing .wav" on the
> "Playback" input and the same text on the "Output Devices" sound
> while nothing is heard from the loudspeaker.
> 
> So it seems that aplay has simply stopped producing output. Other
> audio sources still work as expected e.g. Thunderbird and VLC both
> produce sound. Aplay from a terminal does not.
> 
> I tried "# dnf reinstall /usr/bin/aplay" and it installed
> "alsa-utils" which presumably contains aplay, that made no
> improvement.
> 
> I am still open to suggestions,   Bob

Try 
aplay -vvv [wav file]
or
aplay --dump-hw-params [wav file]

What does 
aplay -l 
show?

See 
man aplay 
for explanations.
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