recording level

To give you background I have a hammerfall 9636 card, a digital piano, a guitar, and a microphone that I intend to do some recording with. Now getting the hammerfall to work and trying to record, an issue arose because the soundlevel of the recording was very low. so I need full output on the piano while recording to get a decent level, and also need to raise the level of the volume of the recorded wav, with lame, when I reach the stage of creating an mp3. I ask because I live in an appartment with neighbours and can not make too much noise late at night, also I like to record with low volume output because I like that better than having everything out. I have made some acquaintance with JAMin. JAMin partly does what I want but it becomes sort of complicated to record that way. What I need is either a virtual amplifier within 64 studio, or a separate multichannel hardware (preamplifier) for all channels. So:given a low input to the sound card, is there any way to increase/amplify the recording level within the applications in 64 studio? any advice very much appreciated. thank you and stay well Greg