On the left are Icons, one is the Audio Mixing Room (F9). Hover your mouse to read the text.
Only the sliders with active audio tracks work.
You can control the levels pretty well with the slider.
Carl312: Windows 10 64-bit 8 GB RAM,AMD Phenom II X4 965 3.4 GHz,ATI Radeon HD 5770 1GB,240GB SSD,two 1TB HDs.