This professional Aiseesoft WMA MP3 Converter is also a perfect Audio Extractor, which can extract audio from video files such as: MPG, MPEG, MPEG2, VOB, MP4, M4V, RM, RMVB, WMV, ASF, MKV, TS, MPV, AVI, 3GP, 3G2, FLV, MPV, MOD, TOD with super fast conversion speed and lossless sound quality. Key Features Merge several audio files into one file Aiseesoft WMA MP3 Converter software provides an easy way to combine and join multiple audio together. Just select the audios you want to join and check the “merge into one file” check box you can finish it easily. Audio Cutter (Trim) Aiseesoft WMA MP3 Converter software provides “Trim” function to help you cut any clip from the original audio. You can set the “Start Time” and “End Time” of the clip you want to get or just drag the slide bar to the accurate position to achieve it. All Encoders and Decoders are built in Full support all popular video and audio format Decoders. Fastest Conversion Speed Provide the fastest conversion speed (>400%), completely support dual core CPU.