Survey: assessing the quality of pitch shifting schemes in singing voice


The aim of this survey is to comparatively evaluate the quality of three different pitch shifting schemes for singing voice.

For this evaluation, we have applied the three pitch shifting algorithms to several actual sung notes.

The survey

Evaluate the quality of the transformed audio samples.

Each participant is asked to evaluate from 0 to 100 the quality of the three transformations presented for each note regading naturalness, vowel intelligibility and breathiness.

The participants are required to score the samples making use of the continuous quality scale (CQS)  shown in Fig. 1.

Fig.1 - Continuous Quality Scale for the Evaluation

All the questions must be answered.

Note that the differences between the audio samples are subtle. Please, use good quality headphones or earphones if possible.

There are 12 questions in this survey.