Windows 10 extremely low volume issue on 64bit Acer Aspire V5-571G

Installed Windows 10 Upgrade (Build 10240). Both my Edifier R18 speakers and Genius comm microphone headphones now have just minimal volume, when completely cranked up by hardware volume control you are able to hear a very faint sound with software sound control at 100%.

My notebook is a 64bit Acer Aspire V5-571G which has only one audio output which is faulty, so both the speakers and the headphones are connected as USB devices through USB audio adapters (one is Nisuta and the other one Seisa). Before upgrading to Windows 10 from Windows 7 both the speakers and the headphones worked OK.

System Information shows:

Name USB Audio Device
Manufacturer (Generic USB Audio)
Status OK
PNP Device ID USB\VID_0D8C&PID_013C&MI_00\8&294BEFD6&0&0000
Driver c:\windows\system32\drivers\usbaudio.sys (10.0.10240.16384, 128,50 KB (131.584 bytes), 10/07/2015 7:59 AM)

Name USB Audio Device
Manufacturer (Generic USB Audio)
Status OK
PNP Device ID USB\VID_0D8C&PID_013C&MI_00\8&16923F31&0&0000
Driver c:\windows\system32\drivers\usbaudio.sys (10.0.10240.16384, 128,50 KB (131.584 bytes), 10/07/2015 7:59 AM)

Name High Definition Audio Device
Manufacturer Microsoft
Status OK
PNP Device ID HDAUDIO\FUNC_01&VEN_8086&DEV_2806&SUBSYS_80860101&REV_1000\4&17EC1275&0&0301
Driver c:\windows\system32\drivers\hdaudio.sys (10.0.10240.16384, 370,50 KB (379.392 bytes), 10/07/2015 7:59 AM)

Name Realtek High Definition Audio
Manufacturer Realtek
Status OK
PNP Device ID HDAUDIO\FUNC_01&VEN_10EC&DEV_0269&SUBSYS_1025072D&REV_1001\4&17EC1275&0&0001
Driver c:\windows\system32\drivers\rtkvhd64.sys (6.0.1.7535, 4,30 MB (4.504.320 bytes), 24/06/2015 10:57 PM)


I have read about a fix disabling all enhancements and setting a bit depth/sampling rate to 24 bit, 192000 Hz (Studio Quality), but after upgrading I am stuck with just two options, 16-bit 44100Hz and 16-bit 48000Hz, no 24 bit sound at all.

If I can't fix this issue I will roll back to Windows 7. Windows 10 may be fine but I'm not willing to have it cripple my notebook.

Thank you in advance for any help you could provide.

I had unsuccessfully tried the Playing Audio troubleshooter before I posted my question, but I had tried it only for my USB speakers and headphones. Jessen P., Microsoft Support Engineer told me to use this troubleshooter so I tried it in order for all playback devices, that is, besides from those USB devices, also for the paired Bluetooth device and the internal speakers (Realtek High Definition Audio). Well, this brought success. I still have no access to 24-bit audio, but now both my USB speakers and headphones are working. Thank you, Jessen P.