thank you friend! I check it and works very fine!
my problem is that any podcast are recorded with too much little level of volume.
ah if its just podcasts I wouldn't boost the preamp for the rest of your media.
After you have analyzed the volume for your library, when you want to listen to podcasts or a mix of other media and podcasts try
DSP studio and check volume level and adaptive volume (peak level normalizing). You can toggle this off for other media by just unchecking the boxes
Even better, you can set up a zone for podcasts and boost the preamp slider when you are currently "in" that zone. Then in Player=>Zone=ZoneSwitch set up a rule for when you play a podcast it switches to this zone with the boost. Another rule to switch back for everything else.