In his 1903 motu proprio “Tra le sollectudine” Pius X encouraged the whole-hearted participation of everyone in the Mass.
https://adoremus.org/1903/11/22/tra-le-sollecitudini/
A half-truth is a lie.Tra Le Sollecitudini is the good Pope's Instruction on Sacred Music.
The gravamen of the
motu proprio is strict limitation on the type of sacred music and the allowable instruments, tempos, length of the sacred music, as well as forbidding the vernacular.
His explicit intent was to
end "the abuse affecting sacred chant and music. And indeed, whether it is owing to the very nature of this art, fluctuating and variable as it is in itself, or to the succeeding changes in tastes and habits with the course of time, or to the fatal influence exercised on sacred art by profane and theatrical art, or to the pleasure that music directly produces, and that is not always easily contained within the right limits, or finally to the many prejudices on the matter, so lightly introduced and so tenaciously maintained even among responsible and pious persons, the fact remains that there is a general tendency to deviate from the right rule, prescribed by the end for which art is admitted to the service of public worship and which is set forth very clearly in the ecclesiastical Canons, in the Ordinances of the General and Provincial Councils, in the prescriptions which have at various times emanated from the Sacred Roman Congregations, and from Our Predecessors the Sovereign Pontiffs."