if (period_time*4 <= maxBufferTime) {
                    // Use 4 periods if possible
                    buffer_time = period_time*4;
                    chunks = 4;
                } else if (period_time*2 <= maxBufferTime) {
                    // Use 2 periods if possible
                    buffer_time = period_time*2;
                    chunks = 2;
                } else {
                    qWarning()<<"QAudioOutput: alsa only supports single period!";
                    fatal = true;
                }