MainWindow 0 0 940 411 MainWindow 2 Tab 1 input format input device output format output device Tab 2 440 190 141 151 input volume Qt::Horizontal output volume Qt::Horizontal 20 20 179 221 sound effect 1 sound effect 2 sound effect 3 sound effect 4 220 20 191 201 start take voice and play start take voice and play (default device) stop (optional) refresh device list Tab 3 50 30 171 41 record 0 50 70 171 41 stop record 240 70 171 41 stop playing 240 30 171 41 play record 0