Some questions on transcoding

[Lex]

Hello Simon,

I hope you could clarify a few things for me. My situation is that I am using REW-created IR convolution files together with transcoding:

- After convulution the volume is about 8 dB lower than before. In my version of ffmpeg the gtype=gn function still works, but I found that in some cases the replay gain of the stream is actually increased.
I have tested a file that originally that had peak value of 1.00000, which, after convolution had a higher replaygain. This makes me wonder whether the gtype=gn command could result in clipping. Would it not be better to use another command to increase to volume with a fixed conventional gain of, say, 2?

- Whatever setting I choose for DSF to PCM conversion, the sound is always affected. Since I want the room correction also for DSF, this is an issue (as my Linn DS3 natively handles DSD). I asked Gemini, who came with a quite interesting recommendation which I would want to try. Unfortunately, I don't know how to enter this in mminimstreamer.
The idea is that DSD produces lots of HF noise, and we would want to include a low pass filter at 28 kHz before transcoding to PCM. The suggested PCM sample frequency is 88 kHz. A restoration of the volume with 6 dB is also suggested (although I would prefer a factor of 2 over 6 dB since that would avoid rounding errors).

- Apparently you can set the precision of the afir filter to "double". Would that yield more accurate results?

Thanks in advance for your response!