Long time old lurker, first post.

Problem is crackling sound. Set up runs audio and video perfectly, except FS9, when run on either XP,7,or 10, then the sound is very crackly, sometimes with an echo. (Currently only windows 10 installed.)

I have tried two different NVIDIA cards, GT 710 and GT 1030 and the sound crackles whether the sound output is via the HDMI port to the monitor, or via the onboard integrated sound.

Without a GPU card the sound is perfect but the video poor.

Set up, (Don't laugh!) Dell Optiplex 745  Intel Q6600 quad core 2.4 GHz 1Tb drive. (It is only a backup for another setup that runs FS9 really well)

Any suggestions welcome!!

 

Are you running FS9 with unlimited frames? This is an unintended consequence if your processor is rather good (good enough to keep over 100 FPS).

Hi Luis,

Thanks for the info. I was not aware that setting the frame rate at unlimited would have an effect on the sound. This processor is not that great, and setting the FR at unlimited only gives me around 30 fps, normally I keep it set at 20 to 25 fps. I understand that FS9 only uses one processor core so I guess using one core on a quad is less efficient than using one core on a dual, for instance. Forgot to mention the old Dell does have 8 GB ram.

Kind regards. 

Grun

I run mine unlimited without the issue. What I have found though is sometimes the sound files become corrupted. I had this happen last week with my 727 fleet. It was the only aircraft that had the issue. I deleted the sound file and reinstalled. Problem fixed.

I run an Nvidia 1070 Display port to HDMI on a Samsung 55". My sound comes off the motherboard optical port to a Samsung soundbar with 5.1 surround.

Camsdad,

Thanks for your post. At present I have installed only the basic fs 9.... (fresh installation). No add on aircraft or scenery. (Must have installed uninstalled several times now). The Windows 10 is a fresh  install, all drivers are up to date, including Nvidia (clean install). 

What bugs me is I have another set up with an older dual core processor than runs fs 9 loaded with add on aircraft and scenery really well with a 7.1 sound system and a 40 inch Samsung 4k TV / monitor.

I am going to check on hardware acceleration next. may need a registry entry from what I have read.

Grun

OK cracked the crackling !

In FS 9 Settings / Display / Hardware...I unchecked the Transform and Lighting check box and the crackling went.

Just have to get rid of all the Windows 10 'Carp'... Candy crush soda and the like, and should have a usable backup.

Grun

How is FS9 performance after that? All configuration guides I've read mentioned keeping T&L enabled, because it improved performance. However, there are no FS9 guides for Windows 7 or later...

14 hours ago, Luis Hernandez said:

How is FS9 performance after that? All configuration guides I've read mentioned keeping T&L enabled, because it improved performance. However, there are no FS9 guides for Windows 7 or later...

It’s hit or miss anymore. I remember the days when Pete would release a new version of FSUIPC and people here said how much it improved frame rates 😁. 

I use T&L have everything maxed in FS9  I have an i7 9700k Processor overclocked with an Nvidia 1070 GPU. I don’t have any sound issues other than an occasional corrupt file from years of tweaking and updating.  With so many configurations, drivers and tweak out there, one fix may not work for someone else. I still find myself tweaking. No one size fits all anymore 🙂 

 

 

Hi Luis, Camsdad,

Been away from the forum and missed your replies.

Yes Luis, the frame rate took a hit, and I shelved the investigation pending more Googling!

DPC latency seems to be the problem, I ran latency mon and the main culprits listed in the readout are, dxgkrnl.sys (direct x kernel driver) and nvlddmkm.sys (nvidia kernel driver).

Both drivers are up to date so I am at a loss when it comes to a solution. The problem is quite widespread it seems.  Hey Ho.