ITU-R BS.1770 was developed for “typical” broadcast program material and was created using that material. While BS.1770 has been shown to be effective at predicting the loudness of “typical” broadcast material, questions around its use for music content has surfaced. More specifically, how music content should be normalized with respect to broadcast content that is speech based. A loudness matching test similar to the one used in the development of ITU-R BS.1770 was carried out, where subjects were tasked with matching audio sequences that were exclusively music based to a speech-based reference signal. Results show that subjects on average tend to match music content 3-4 dB higher than the speech-based reference signal when measured similar in loudness by ITU-R BS.1770.
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