Hi, rharv. Thank you very much for your advise and help.

OK, I tried to do as you told me.
1) using my old laptop with BB2018, I rendered the drum track in WAV.
2) copied to USB stick
3) opened my project in BB2025 in my new laptop and imported the WAV file to Audio track.
I hope this is right.

Then I muted the drum track and played.
I don't know why but the audio played very slow, like almost half the tempo.
The sound is very blurry the whole time and I can't say there's the hiss noise.
What did I do wrong?

Regards,
Jazzutako