Playing a .mp3 flie

If anyone is still reading this:

I am not further down the track of understanding why:
play /home/me/Music/DontTouchTheButton.mp3
from a terminal/CLI works. All things on THIS machine.

If I put that into a NR exec node it doesn't.

Yet, with debug nodes on all three outputs of the node, it would seem it works/ed.

Output #1: ""
Output #2: /home/me/Music/DontTouchTheButton.mp3: File Size: 36.2k Bit Rate: 173k Encoding: MPEG audio Channels: 2 @ 16-bit Samplerate: 44100Hz Replaygain: off Duration: 00:00:01.67 In:0.00% 00:00:00.00 [00:00:01.67] Out:0 [ | ] Clip:0 In:11.1% 00:00:00.19 [00:00:01.49] Out:8.19k [ ====|==== ] Clip:0 In:22.2% 00:00:00.37 [00:00:01.30] Out:16.4k [ ====|==== ] Clip:0 In:27.8% 00:00:00.46 [00:00:01.21] Out:20.5k [ -==|=== ] Clip:0 In:38.9% 00:00:00.65 [00:00:01.02] Out:28.7k [ ====|==== ] Clip:0 In:44.5% 00:00:00.74 [00:00:00.93] Out:32.8k [ ====|==== ] Clip:0 In:55.6% 00:00:00.93 [00:00:00.74] Out:41.0k [ ====|==== ] Clip:0 In:61.1% 00:00:01.02 [00:00:00.65] Out:45.1k [ -==|== ] Clip:0 In:72.3% 00:00:01.21 [00:00:00.46] Out:53.2k [ ====|==== ] Clip:0 In:77.8% 00:00:01.30 [00:00:00.37] Out:57.3k [ ====|==== ] Clip:0 ...
Output #3: {"code":0}

So, where now?

Oh, I have also looked at this:
Someone with similar problems

That flow works. I hear the sound.

Further complicating the issue - for me at least.