Depending on which software you use, this can be done to tweak the sound in between the songs:
- Manually apply + volume db
If the talk between the songs has approx. the same volume then >> apply approx. the + volume db as after the first song and so on >> to the last song is fixed.
- If you recorded both songs+talk in between with comparable low volume, you might do the vice-verse...Increasing the volume of the songs instead...
Good Luck with mixing!