Below is a ranked list of the best free audio converter software programs and online converter services available today: To increase the original APE audio volume: click " Setting. " button, the "Advanced Settings" Window will pop up right beside the main window. In the "Advanced Settings" Window, click " Advanced " tab, and then go to "Audio" column, click 100% tab on the right side of volume to select preferable volume ratio from the drop-down list or just enter the desired volume ratio like 300%, 400%. The Best flac to m4a online converter go to website: best flac to m4a converter love use flac to m4a free online converter this