What is a true peak?
True Peak is a metric used to determine the actual maximum level of an audio signal. It is commonly used in recording studios and in the professional music sector to ensure that audio signals do not become too loud when played back on different playback devices, thereby causing distortion. Especially at Online mastering attention is paid to this value as it is of great importance for the digital publication.
True peak is measured by analyzing the audio signal on a special analyzer or in audio software. This not only takes into account the actual peak level of the audio signal, but also the distortions that can occur when the audio signal is digitized and played back. This distortion can cause the actual maximum audio signal level to be higher than the measured peak level, which is why True Peak is considered the more accurate metric.
True Peak is commonly used to ensure audio signals are accurate for release on various playback devices such as radio, television, or music streaming services are optimally controlled.
Overall, True Peak is an important metric in professional music section, which can help ensure that audio signals are reproduced cleanly and without distortion on various playback devices.
How is true peak calculated?
The D/A conversion process, in which a digital signal is converted back into an analog signal for playback, can lead to slight level fluctuations. The analog reconstruction of the signal can have peaks well above the highest digital sample. In this case one speaks of a true peak or inter-sample peak.
True Peak is calculated by analyzing the audio signal on a special analyzer. The audio signal is divided into small time segments and each time segment is analyzed individually.
When analyzing the audio signal, the audio signal is broken down into its individual frequencies. Each frequency of the audio signal is expressed by a specific level value.
Then the level values of all frequencies of the audio signal are compared with each other and the maximum level value is determined as the true peak of the audio signal. This true peak value indicates how loud the audio signal actually is and also takes into account the distortions that can occur when the audio signal is digitized and played back.
It is important to note that True Peak is not associated with the peak level of the audio signal is identical. Peak level only indicates the current maximum audio signal level, while True Peak takes into account the actual maximum audio signal level that can occur when the audio signal is digitized and played back.