Strange midi bass transposition in rendition

I was not playing with Reaper last days, but here are my today's results. 1x Offline - the same. Strange, I'm close to sure it worked before. Full speed Offline... when I have Creative ASIO (I'm not tracking, only listening and I don't want to use HW mix, etc) - rendering goes 3.4x realtime and the result is bad. With Behringer's ASIO (UCA202) it goes 1.5x realtime. I'm surprised the rendering speed varies depending on the device. But the result is still bad. Online... Originally I wanted to ask how it is used as nothing happens when I press Render with Creative device, but with Behringer it works. Result is still bad. Bass is not so low - obviously it depends on speed. But it's still not the same like when it's played back. (EDIT: I had Winamp open to check the rendition out, so that might be the reason why Reaper couldn't do online with Creative.) ... some thinking... it really worked before! Maybe, just maybe it's sampling frequency. The thing is Behringer's natural is 48k so I changed my project too and now the only thing where I wanted 44.1k was the output ogg/mp3/whatever. So I changed the rendering sample rate to 48k too and IT WORKS (I tried full offline, no problem). Still - how is this bug of that particular VSTi? Isn't there anything Reaper can do?

I was wrong, 4front bass is *not* a SynthEdit plugin. However I've had other SynthEdit based plugins in projects throwing other, unrelated plugins off tune in the rendered file. If you know which new plugins you used in this project (that would explain why it worked before), take them out and try to render again. If you're not sure, upload the RPP file to stashbox and I'll have a look at the plugins.

It worked before when my project was 44.1k and I rendered to 44.1k, now I have 48k project and when I render 48k it works. So I think it's probably bug in Reaper, but I'm not sure with that. I have two midi tracks, one is bass with 4front, ReaEQ and ReaComp after the synth. Another track has drums (GTG DPC3 synth) with ReaComp after it. That's it. Drums sound pretty fine even in those oggs where bass is shifted. I don't see any complications in FX chain. Bottom line: when I render with the project's sample rate, it's OK. Otherwise my midi bass is shifted and off-tune.