I would write about it in detail here.
I have an HP Ipaq 614c, WM 6, first time I installed it from the first post I lost all sound like so many other people and I had to hard reset to get the sound back. Thanks to someone who posted a warning before, I did a complete backup before trying this software.
So after my hard reset, I installed it on complete clean device, I lost the sound initially again on the clean device too, but this time I didnt use any files from first post but from this post (the files might be same, I dont know):
And without panicking I followed every instruction step by step as mentioned in that RAR file, and after the third reset my sound was back with the software installed on my clean device.
Than I checked if their was any difference, to all those who said I didnt notice any change in volume or clarity, I felt the same too, I was checking and unchecking the 'Enable' box again and again to see if their was any difference but coudnt notice any, but still I felt overall it was very loud and clear than before. So I uninstalled the application and played the same track again this time, and I could see the huge difference. THIS SOFTWARE IS MAGNIFICENT!! I think that enable box is just for show.. coz disabling it dosent make anything different for me, but uninstalling it showed the massive difference in sound quality.
So right now I am restoring my device from backup and would install again using the step by step method mentioned in that RAR file, without panicking if the sounds goes off in first place, coz I know it will be back again after the 3rd and 4th step.
Some steps where I think others maybe making mistakes:
1. installing only SRS_WOW_HD_121.A2DP and not SRS.WOW.HDwm6.1.CAB. Install the SRS.WOW.HDwm6.1.CAB first and than the other one. Also file in opening post never promted me to do soft reset, but the both CAB files from the RAR file above automatically prompted me to do soft reset after installing.
2. not noting down the initial value of DLL before the installation and changing the value back to old one after the installation.
These two mistake I did but later realized.