Hello, MixPad may be what you are looking for. Add multiple tracks to the timeline, adjust levels, and useful sound effects and clean-up tools. Check it out here: http://www.nch.com.au/mixpad/index.html
Hi Juliaausten, We are glad to hear that you are enjoying MixPad 4.09, and thank you for telling others about us. We do have the new version, MixPad 4.16, available now at: http://www.nch.com.au/mixpad/index.html .
NCH Software Team