Strange Doppler effect and a fix

[GaryG]

Hi

I've noticed for a while that the Doppler effect has been working in reverse for a few months here. Today I did a lot of MSTS digging with no cure found. When the train passed and started moving away, all the sounds increased in frequency instead of dropping as they used to.

I tried many things, even a "freshly installed" MSTS version I save just for tests like this. Nothing I tried cured the Doppler reversal but I did finally realize that it probably wasn't an MSTS problem.

I fired up dxdiag and set the only sound adjustment it has to "Basic acceleration" and surprise, surprise ... the Doppler effect was working properly with frequencies dropping as the train passed and moved away!

I tried "Standard acceleration" but it and "Full acceleration" both caused the Doppler reverse effect. I have no idea what the actual cause is but at least I can "fix" the problem now. Perhaps it's an audio driver issue or maybe a DirectX 9.0c bug.

Has anyone else experienced the Doppler reversal "enhancement"? My hardware is a Realtek ALC882 with the latest driver (WDM v1.86).

GaryG

[drjoe]

MSTS almost always works better with Sound Acceleration set to Basic.

[Seattle Amtrak]

Hi

I've noticed for a while that the Doppler effect has been working in reverse for a few months here. Today I did a lot of MSTS digging with no cure found. When the train passed and started moving away, all the sounds increased in frequency instead of dropping as they used to.

I tried many things, even a "freshly installed" MSTS version I save just for tests like this. Nothing I tried cured the Doppler reversal but I did finally realize that it probably wasn't an MSTS problem.

I fired up dxdiag and set the only sound adjustment it has to "Basic acceleration" and surprise, surprise ... the Doppler effect was working properly with frequencies dropping as the train passed and moved away!

I tried "Standard acceleration" but it and "Full acceleration" both caused the Doppler reverse effect. I have no idea what the actual cause is but at least I can "fix" the problem now. Perhaps it's an audio driver issue or maybe a DirectX 9.0c bug.

Has anyone else experienced the Doppler reversal "enhancement"? My hardware is a Realtek ALC882 with the latest driver (WDM v1.86).

GaryG

My friend andrewkim110 from this site is having the same problem you had with the reverse Doppler effect as well. He tried to reinstall his sound drivers, and that didn't help. Thanks for posting what worked for you up here. I have to tell him to do what worked for you, y'know, the dxdiag, basic acceleration deal. Thanks a ton!

[andrewkim101]

My friend andrewkim110 from this site is having the same problem you had with the reverse Doppler effect as well. He tried to reinstall his sound drivers, and that didn't help. Thanks for posting what worked for you up here. I have to tell him to do what worked for you, y'know, the dxdiag, basic acceleration deal. Thanks a ton!

Trevor,

I was able to get the Doppler effect fixed. It works so realistically. I basically uninstall and reinstall the audio driver and it does the trick. I'm happy as a child.

Andrew.

[GaryG]

Hi

I tried installing the latest audio driver version but the Doppler is still reversed with the higher DirectX settings. I'll try bumping the settings up every month or two and perhaps it will cure itself one day. For now I'm not noticing any disadvantage with the lowered setting.

GaryG

[rkirkley]

It worked for me

Thanks for the information about dxdiag and Basic Acceleration. It fixed the reverse Doppler effect for me.

--Robert

[atsf37l]

Thanks!

Thanks Gary! I just rebuilt my computer - got my browser hijacked and only had two choices, pay the spyware vendor his ransom or format C - and after rebuilding my sound was the PITS! This little trick made it all better. Great tip.