Where can i find this file ? /etc/asound.conf
I don't have it in my installation.
There are 2 files named somehow asound.conf, but not sure these are the files your looking for;
asound.conf_jack and asound.conf_oss, located in folder (Zorin16);
/usr/share/doc/libasound2-plugins/examples
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Anything in /doc is documentation only, and does not necessarily leading to an installed file.
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Tried to use this .sh file Enable 2.1 audio output in PulseAudio · GitHub and i got something new (seeing the subwoofer finally) BUT still when i press on the subwoofer nothing happens.
When i do the speaker test in 4.0 (just for testing purpose) front left and front right are using the same channel (my subwoofer). rear right and rear left are using my speakers in front of my laptop.
I guess this leads to nowhere 
To try from terminal;
speaker-test -c4 -l2 -twav (or)
speaker-test -c5 -l2 -twav (for the Center)
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Still a bit different compared to Windows. In Windows the subwoofer was only meant for bass and not bass/sound like it does in Linux.
Going to check to override pins again from a different model. I have a Acer Predator G9-793-71SJ. With the first option from below i can control the speakers seperatly from the subwoofer in alsamixer. If i use the 2nd option from below i cannot control them seperatly in alsamixer.
My research so far: For the G9-973 model i would use the first option from below
Bugzilla report: https://bugzilla.kernel.org/show_bug.cgi?id=195049
This thread can be closed
Anyone knows if the intel-hd-drivers in linux has a power save setting ?
/etc/modprobe.d/audio_powersave.conf
# For AC97 cards:
options snd_ac97_codec power_save=1
# For HD audio cards:
options snd_hda_intel power_save=1
Is this the correct one ? 1 is on 0 is off ?
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Yes on both.
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I added this a few days ago on my external test drive /etc/modprobe.d/alsa-base.conf because i was messing around a bit with the speaker settings.
options snd-hda-intel power_save=0 power_save_controller=N snoop=0
I noticed that a issue got fixed on the external test drive. In Windows 10 2 years ago i noticed a weird popping sound when i visited a website (ad.nl) and clicked on a few pages on that website using firefox. I never managed to get that fixed in Windows, a few days ago because i was configuring my speakers i noticed it again on my internal drive. Thought it was gone but it was still there. Adding that save setting fixed it somehow. 
Yes he have problem with sound subwoofer and etc.
This thread is mine and i dont have issues with microphone.
Thread closed upon request.