Well I know this is pretty useless, but here we go again.
***Musicam Sacram
***Instruction On Music In The Liturgy
Sacred Congregation of Rites * March 5, 1967
62. Musical instruments can be very useful in sacred celebrations, whether they accompany the singing or whether they are played as solo instruments. "The pipe organ is to be held in high esteem in the Latin Church, since it is its traditional instrument, the sound of which can add a wonderful splendor to the Church’s ceremonies and powerfully lift up men’s minds to God and higher things.
"The use of other instruments may also be admitted in divine worship, given the decision and consent of the competent territorial authority, provided that the instruments are suitable for sacred use, or can be adapted to it, that they are in keeping with the dignity of the temple, and truly contribute to the edification of the faithful."43
63. In permitting and using musical instruments, the culture and traditions of individual peoples must be taken into account. However, those instruments which are, by common opinion and use, suitable for secular music only, are to be altogether prohibited from every liturgical celebration and from popular devotions.44
Any musical instrument permitted in divine worship should be used in such a way that it meets the needs of the liturgical celebration, and is in the interests both of the beauty of worship and the edification of the faithful.
And for Music in Catholic Worship (Written by our territorial authority, The USCCB.)
- We do a disservice to musical values, however, when we confuse the judgment of music with the judgment of musical style. Style and value are two distinct judgments. Good music of new styles is finding a happy home in the celebrations of today. To chant and polyphony we have effectively added the chorale hymn, restored responsorial singing to some extent, and employed many styles of contemporary composition. Music in folk idiom is finding acceptance in eucharistic celebrations. We must judge value within each style.
“In modern times the Church has consistently recognized and freely admitted the use of various styles of music as an aid to liturgical worship. Since the promulgation of the Constitution on the Liturgy and more especially since the introduction of vernacular languages into the liturgy, there has arisen a more pressing need for musical compositions in idioms that can be sung by the congregation and thus further communal participation.”'2
- We do a disservice to musical values, however, when we confuse the judgment of music with the judgment of musical style. Style and value are two distinct judgments. Good music of new styles is finding a happy home in the celebrations of today. To chant and polyphony we have effectively added the chorale hymn, restored responsorial singing to some extent, and employed many styles of contemporary composition. Music in folk idiom is finding acceptance in eucharistic celebrations. We must judge value within each style.
“In modern times the Church has consistently recognized and freely admitted the use of various styles of music as an aid to liturgical worship. Since the promulgation of the Constitution on the Liturgy and more especially since the introduction of vernacular languages into the liturgy, there has arisen a more pressing need for musical compositions in idioms that can be sung by the congregation and thus further communal participation.”'2
So yes they are appropriate for Mass. The documents on music from Vatican II state that no instrument is prohibited. I have heard many examples of electric guitars and drums played in an appropriate and reverent manner. Therefore they have been adapted to sacred use as required in the documents. Should they be the only options? Definitely not. But to deny them to people who find them an enhancement to worship is in accordance to the documents on liturgy.
Unfortunately, a lot of people on this board tend to either ignore documents they do not like or read their own biases into them. Anyway, let the games begin.