preset = [preset stringByAppendingFormat:@"%.1f ", [o_slider_band2 floatValue] ];
preset = [preset stringByAppendingFormat:@"%.1f ", [o_slider_band3 floatValue] ];
preset = [preset stringByAppendingFormat:@"%.1f ", [o_slider_band4 floatValue] ];
preset = [preset stringByAppendingFormat:@"%.1f ", [o_slider_band2 floatValue] ];
preset = [preset stringByAppendingFormat:@"%.1f ", [o_slider_band3 floatValue] ];
preset = [preset stringByAppendingFormat:@"%.1f ", [o_slider_band4 floatValue] ];