I record at 96/24. When rendering to WAV and resampling to 44.1Khz (or 48Khz) in Reaper the resulting audio is very different; the volume is affected particularly for lower frequencies. Rendering to native 96 Khz is fine.
See attached image or :
https://i.imgur.com/Flm1zkH.jpg
The top wave is a Reaper render to 96 Khz - it sounds perfect
The middle wave is at 44.1 Khz, resampled down from the above 96Khz source using an external encoder (I've tried Xrecode and Sound Forge) - sounds perfect and the wave forms looks the same as the 96Khz wave.
The bottom wave is a Reaper render to 44.1 Khz - it sounds different (worse) and the wave looks very different compared to the other two.
This happens regardless of the resampling mode used, the bit depth (24 or 16) or the output file format used. I noticed this a few months ago and it's still the same with the latest version.
I now use an external encoder to downsample but does anyone know why Reaper does this and if it can be fixed? It seems like a pretty big issue and it could catch a lot of people out.