2016-04-03, 08:25 PM
(2016-04-03, 09:42 AM)affinite Wrote:(2016-04-03, 03:25 AM)Vamonos Wrote: I just uploaded your mp3 to my pi 3 and played it through the 3.5mm audio jack, through a portable amplified speaker and it sounded fine. I used this command.
omxplayer -o local "canopus coolant alarm.mp3"
I also set a trigger in OP and it sounded fine. Is the background noise subtle? Something that I might miss?
Thanks for checking. I just tried connecting my headphones and it was clear of noise. It seems that my speaker/amplifier combination is picking up the noise. I'll try shielding it better !
Edit: The RPI was putting the noise onto the DC supply to my amplifier. Running the Pi AND the amp on same psu - very noisy. Ran the amp off a separate battery - no noise. I added 12v DC power conditioner to clean up the DC supply to the Amp and, although it didn't remove the noise completely, it improved it a lot.
I just checked with a bluetooth speaker connected by cable - works fine and quality is great without disturbing noise. Have not managed to get the bluetooth connection setup though. Pairing und Trusted devise works but connecting I could not get working yet.