Piano Solo - Level 5 - Digital Download

SKU: A0.1028034

Composed by Maxwell Olson. Contemporary,Jazz,Latin,World. Score. 7 pages. Jake Madeira #3223163. Published by Jake Madeira (A0.1028034).

This étude is one of energetic character with simple, yet powerful melodies and rhythms that create a sense of curiosity. I composed this piece in a simpler form when I was around 17, in my high school music theory class. All of the ideas were there, melody and structure, but what it lacked was experience. It felt flat. So, 5 years later, after I rediscovered the piece, I decided to put some time into adding flavor, excitement, and intrigue. In doing so, I hope that I've created not only a technical challenge that will strengthen your skills, but a fun piece of music that you'll love to play!

Split into three parts in an ABA format, this piece features a main theme divided by a softer second theme, both of which provide technical challenges in their own rights. The first focus of this étude is to build stamina in maintaining rapid octave progressions in each hand. This is coupled with quick jumps in the right hand that require precise and deliberate movements to perfect. The second focus is to strengthen control over legato passages in rolling arpeggios, while maintaining a delicate touch for the melody, and exercising the dynamic range of the fingers.

In practicing this piece, it is very important to start slowly and with definitive control in all sections! It cannot be stressed enough how much of an impact bad habits can make on the execution of this étude. If you work diligently on finger control and technique, it will stick with you in all of your future endeavors! Be warned though: this is a difficult piano solo. It will take time and effort to learn, however, those efforts will all pay off in the end. Don't let it discourage you.

I wish you all luck in learning this étude, and if you have any questions at all, please feel free to email me at walkingreject@gmail.com.

Piano,Trumpet - Level 4 - Digital Download

SKU: A0.898024

Composed by Jean-Baptiste Arban. Arranged by Ken Saul. Concert,Opera,Romantic Period,Standards. Score and part. 18 pages. Ken Saul #6092729. Published by Ken Saul (A0.898024).

J. B. Arban (1825 - 1889) wrote a number of fine solos for cornet and piano that are published in the big Arban's method book.  But there are a few more of these solos that were not in the big book, and this is one of them. La Muette de Portici (the mute girl of Portici) was an early French grand opera by Auber. These opera melodies were the most loved popular songs in Arban's day, and he wrote this gem of a solo using several of the beautiful melodies from the opera.  The original solo was for the now-obsolete cornet in A.  I have transposed it so it is playable on the modern Bb cornet. This solo is every bit as fine as the ones in the back of the Arban's method book and will be a hit on any recital.

Brass Quartet Horn,Trombone - Level 2 - Digital Download

SKU: A0.1258806

Composed by Guillaume de Machaut, 1300-1377. Arranged by James M. Guthrie. Chamber,Contest,Early Music,Festival,Historic,Medieval. 84 pages. Jmsgu3 #852054. Published by jmsgu3 (A0.1258806).

INSTRUMENTATION: 2 Horns in F, 2 Tenor Trombones.
1. Kyrie
2. Gloria
3. Credo
4. Sanctus
5. Agnus dei
6. Ite missa est

Guillaume de Machaut composed the Messe de Nostre Dame, also known as the Mass of Our Lady, in the early 1360s. He wrote the mass for the Cathedral at Reims, where he served as a canon, a permanent clergy member. According to a rubric found at the Cathedral, it would have likely been performed for the Saturday Lady Mass. 

Guillaume de Machaut's Messe de Nostre Dame is significant in the history of music for several reasons:

1. It is the first complete setting of the Ordinary of the Mass by a single composer that has survived.
2. It is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor.
3. It was composed in four voices, which was unusual at the time.
4. The texts of both Gloria and Credo are quite lengthy, and therefore Machaut set these movements in a style reminiscent of the earlier discant style, having short phrases, similar rhythmic motion in all parts, and a low ratio of notes per syllable of text, both ending with long, rhapsodic sections for the final word, Amen.

Machaut's Messe de Nostre Dame is a landmark in musical history, but it is far from being avant-garde merely for the sake of uniqueness. It is considered to be a culmination of the musical style of the Ars Nova period, which was characterized by complex polyphonic textures and rhythmic innovations. The mass is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. Overall, Machaut's Messe de Nostre Dame is a significant work that represents a culmination of the musical style of the Ars Nova period and reflects the changing attitudes towards religion and music during the 14th century. 

The mass consists of five movements: Kyrie, Gloria, Credo, Sanctus, and Agnus Dei, followed by the dismissal Ite, missa est. The tenor of the Kyrie is based on Vatican Kyrie IV, the Sanctus, and Agnus correspond to Vatican Mass XVII, and the Ite is on Sanctus VIII. The Gloria and Credo have no apparent chant basis, although they are stylistically related to one another. The mass is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor. The Messe de Nostre Dame is significant in the history of music because it is the first complete setting of the Ordinary of the Mass by a single composer that has survived. It is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. 

Overall, the Messe de Nostre Dame was an important part of the liturgical practices of the time, and it is still regarded as a masterpiece of medieval music and of all religious music.

Woodwind Ensemble,Woodwind Quartet Alto Flute,Bass Flute - Level 2 - Digital Download

SKU: A0.1260536

Composed by Guillaume de Machaut, 1300-1377. Arranged by James M. Guthrie. Chamber,Contest,Early Music,Festival,Historic,Medieval. 86 pages. Jmsgu3 #853678. Published by jmsgu3 (A0.1260536).

INSTRUMENTATION: 2 ALTO FLUTES, 2 BASS FLUTES
1. Kyrie
2. Gloria
3. Credo
4. Sanctus
5. Agnus dei
6. Ite missa est

Guillaume de Machaut composed the Messe de Nostre Dame, also known as the Mass of Our Lady, in the early 1360s. He wrote the mass for the Cathedral at Reims, where he served as a canon, a permanent clergy member. According to a rubric found at the Cathedral, it would have likely been performed for the Saturday Lady Mass. 

Guillaume de Machaut's Messe de Nostre Dame is significant in the history of music for several reasons:

1. It is the first complete setting of the Ordinary of the Mass by a single composer that has survived.
2. It is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor.
3. It was composed in four voices, which was unusual at the time.
4. The texts of both Gloria and Credo are quite lengthy, and therefore Machaut set these movements in a style reminiscent of the earlier discant style, having short phrases, similar rhythmic motion in all parts, and a low ratio of notes per syllable of text, both ending with long, rhapsodic sections for the final word, Amen.
Machaut's Messe de Nostre Dame is a landmark in musical history, but it is far from being avant-garde merely for the sake of uniqueness. It is considered to be a culmination of the musical style of the Ars Nova period, which was characterized by complex polyphonic textures and rhythmic innovations. The mass is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. Overall, Machaut's Messe de Nostre Dame is a significant work that represents a culmination of the musical style of the Ars Nova period and reflects the changing attitudes towards religion and music during the 14th century. 

The mass consists of five movements: Kyrie, Gloria, Credo, Sanctus, and Agnus Dei, followed by the dismissal Ite, missa est. The tenor of the Kyrie is based on Vatican Kyrie IV, the Sanctus, and Agnus correspond to Vatican Mass XVII, and the Ite is on Sanctus VIII. The Gloria and Credo have no apparent chant basis, although they are stylistically related to one another. The mass is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor. The Messe de Nostre Dame is significant in the history of music because it is the first complete setting of the Ordinary of the Mass by a single composer that has survived. It is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. 

Overall, the Messe de Nostre Dame was an important part of the liturgical practices of the time, and it is still regarded as a masterpiece of medieval music and of all religious music.

String Quartet Cello,String Quartet,Viola,Violin - Level 2 - Digital Download

SKU: A0.1257127

Composed by Guillaume de Machaut, 1300-1377. Arranged by James M. Guthrie, ASCAP. Chamber,Contest,Early Music,Festival,Historic,Medieval. 84 pages. Jmsgu3 #850426. Published by jmsgu3 (A0.1257127).

1. Kyrie
2. Gloria
3. Credo
4. Sanctus
5. Agnus dei
6. Ite missa est

Guillaume de Machaut composed the Messe de Nostre Dame, also known as the Mass of Our Lady, in the early 1360s. He wrote the mass for the Cathedral at Reims, where he served as a canon, a permanent clergy member. According to a rubric found at the Cathedral, it would have likely been performed for the Saturday Lady Mass. 

Guillaume de Machaut's Messe de Nostre Dame is significant in the history of music for several reasons:

• It is the first complete setting of the Ordinary of the Mass by a single composer that has survived.
• It is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor.
• It was composed in four voices, which was unusual at the time.
• The texts of both Gloria and Credo are quite lengthy, and therefore Machaut set these movements in a style reminiscent of the earlier discant style, having short phrases, similar rhythmic motion in all parts, and a low ratio of notes per syllable of text, both ending with long, rhapsodic sections for the final word, Amen.

Machaut's Messe de Nostre Dame is a landmark in musical history, but it is far from being avant-garde merely for the sake of uniqueness. It is considered to be a culmination of the musical style of the Ars Nova period, which was characterized by complex polyphonic textures and rhythmic innovations. The mass is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. Overall, Machaut's Messe de Nostre Dame is a significant work that represents a culmination of the musical style of the Ars Nova period and reflects the changing attitudes towards religion and music during the 14th century. 

The mass consists of five movements: Kyrie, Gloria, Credo, Sanctus, and Agnus Dei, followed by the dismissal Ite, missa est. The tenor of the Kyrie is based on Vatican Kyrie IV, the Sanctus, and Agnus correspond to Vatican Mass XVII, and the Ite is on Sanctus VIII. The Gloria and Credo have no apparent chant basis, although they are stylistically related to one another. The mass is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor. The Messe de Nostre Dame is significant in the history of music because it is the first complete setting of the Ordinary of the Mass by a single composer that has survived. It is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. 

Overall, the Messe de Nostre Dame was an important part of the liturgical practices of the time, and it is still regarded as a masterpiece of medieval music and of all religious music.

Saxophone Quartet,Woodwind Ensemble Alto Saxophone,Baritone Saxophone,Tenor Saxophone - Level 2 - Digital Download

SKU: A0.1257962

Composed by Guillaume de Machaut, 1300-1377. Arranged by James M. Guthrie, ASCAP. Chamber,Contest,Early Music,Festival,Historic,Medieval. 85 pages. Jmsgu3 #851199. Published by jmsgu3 (A0.1257962).

1. Kyrie
2. Gloria
3. Credo
4. Sanctus
5. Agnus dei
6. Ite missa est

Guillaume de Machaut composed the Messe de Nostre Dame, also known as the Mass of Our Lady, in the early 1360s. He wrote the mass for the Cathedral at Reims, where he served as a canon, a permanent clergy member. According to a rubric found at the Cathedral, it would have likely been performed for the Saturday Lady Mass. 

Guillaume de Machaut's Messe de Nostre Dame is significant in the history of music for several reasons:

• It is the first complete setting of the Ordinary of the Mass by a single composer that has survived.
• It is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor.
• It was composed in four voices, which was unusual at the time.
• The texts of both Gloria and Credo are quite lengthy, and therefore Machaut set these movements in a style reminiscent of the earlier discant style, having short phrases, similar rhythmic motion in all parts, and a low ratio of notes per syllable of text, both ending with long, rhapsodic sections for the final word, Amen.

Machaut's Messe de Nostre Dame is a landmark in musical history, but it is far from being avant-garde merely for the sake of uniqueness. It is considered to be a culmination of the musical style of the Ars Nova period, which was characterized by complex polyphonic textures and rhythmic innovations. The mass is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. Overall, Machaut's Messe de Nostre Dame is a significant work that represents a culmination of the musical style of the Ars Nova period and reflects the changing attitudes towards religion and music during the 14th century. 

The mass consists of five movements: Kyrie, Gloria, Credo, Sanctus, and Agnus Dei, followed by the dismissal Ite, missa est. The tenor of the Kyrie is based on Vatican Kyrie IV, the Sanctus, and Agnus correspond to Vatican Mass XVII, and the Ite is on Sanctus VIII. The Gloria and Credo have no apparent chant basis, although they are stylistically related to one another. The mass is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor. The Messe de Nostre Dame is significant in the history of music because it is the first complete setting of the Ordinary of the Mass by a single composer that has survived. It is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. 

Overall, the Messe de Nostre Dame was an important part of the liturgical practices of the time, and it is still regarded as a masterpiece of medieval music and of all religious music.

Woodwind Ensemble,Woodwind Quartet Bassoon,English Horn - Level 2 - Digital Download

SKU: A0.1258422

Composed by Guillaume de Machaut, 1300-1377. Arranged by James M. Guthrie. Chamber,Contest,Early Music,Festival,Historic,Medieval. 84 pages. Jmsgu3 #851675. Published by jmsgu3 (A0.1258422).

INSTRUMENTATION: 2 ENGLISH HORNS and 2 BASSOONS
1. Kyrie
2. Gloria
3. Credo
4. Sanctus
5. Agnus dei
6. Ite missa est

Guillaume de Machaut composed the Messe de Nostre Dame, also known as the Mass of Our Lady, in the early 1360s. He wrote the mass for the Cathedral at Reims, where he served as a canon, a permanent clergy member. According to a rubric found at the Cathedral, it would have likely been performed for the Saturday Lady Mass. 

Guillaume de Machaut's Messe de Nostre Dame is significant in the history of music for several reasons:

1. It is the first complete setting of the Ordinary of the Mass by a single composer that has survived.
2. It is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor.
3. It was composed in four voices, which was unusual at the time.
4. The texts of both Gloria and Credo are quite lengthy, and therefore Machaut set these movements in a style reminiscent of the earlier discant style, having short phrases, similar rhythmic motion in all parts, and a low ratio of notes per syllable of text, both ending with long, rhapsodic sections for the final word, Amen.
Machaut's Messe de Nostre Dame is a landmark in musical history, but it is far from being avant-garde merely for the sake of uniqueness. It is considered to be a culmination of the musical style of the Ars Nova period, which was characterized by complex polyphonic textures and rhythmic innovations. The mass is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. Overall, Machaut's Messe de Nostre Dame is a significant work that represents a culmination of the musical style of the Ars Nova period and reflects the changing attitudes towards religion and music during the 14th century. 

The mass consists of five movements: Kyrie, Gloria, Credo, Sanctus, and Agnus Dei, followed by the dismissal Ite, missa est. The tenor of the Kyrie is based on Vatican Kyrie IV, the Sanctus, and Agnus correspond to Vatican Mass XVII, and the Ite is on Sanctus VIII. The Gloria and Credo have no apparent chant basis, although they are stylistically related to one another. The mass is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor. The Messe de Nostre Dame is significant in the history of music because it is the first complete setting of the Ordinary of the Mass by a single composer that has survived. It is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. 

Overall, the Messe de Nostre Dame was an important part of the liturgical practices of the time, and it is still regarded as a masterpiece of medieval music and of all religious music.

Woodwind Ensemble,Woodwind Quartet - Level 2 - Digital Download

SKU: A0.1259387

Composed by Guillaume de Machaut, 1300-1377. Arranged by James M. Guthrie. Chamber,Contest,Early Music,Festival,Historic,Medieval. 38 pages. Jmsgu3 #852663. Published by jmsgu3 (A0.1259387).

INSTRUMENTATION: 2 Alto flutes, 2 Bass Flutes
1. Kyrie
2. Gloria
3. Credo
4. Sanctus
5. Agnus dei
6. Ite missa est

Guillaume de Machaut composed the Messe de Nostre Dame, also known as the Mass of Our Lady, in the early 1360s. He wrote the mass for the Cathedral at Reims, where he served as a canon, a permanent clergy member. According to a rubric found at the Cathedral, it would have likely been performed for the Saturday Lady Mass. 

Guillaume de Machaut's Messe de Nostre Dame is significant in the history of music for several reasons:

1. It is the first complete setting of the Ordinary of the Mass by a single composer that has survived.
2. It is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor.
3. It was composed in four voices, which was unusual at the time.
4. The texts of both Gloria and Credo are quite lengthy, and therefore Machaut set these movements in a style reminiscent of the earlier discant style, having short phrases, similar rhythmic motion in all parts, and a low ratio of notes per syllable of text, both ending with long, rhapsodic sections for the final word, Amen.
Machaut's Messe de Nostre Dame is a landmark in musical history, but it is far from being avant-garde merely for the sake of uniqueness. It is considered to be a culmination of the musical style of the Ars Nova period, which was characterized by complex polyphonic textures and rhythmic innovations. The mass is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. Overall, Machaut's Messe de Nostre Dame is a significant work that represents a culmination of the musical style of the Ars Nova period and reflects the changing attitudes towards religion and music during the 14th century. 

The mass consists of five movements: Kyrie, Gloria, Credo, Sanctus, and Agnus Dei, followed by the dismissal Ite, missa est. The tenor of the Kyrie is based on Vatican Kyrie IV, the Sanctus, and Agnus correspond to Vatican Mass XVII, and the Ite is on Sanctus VIII. The Gloria and Credo have no apparent chant basis, although they are stylistically related to one another. The mass is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor. The Messe de Nostre Dame is significant in the history of music because it is the first complete setting of the Ordinary of the Mass by a single composer that has survived. It is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. 

Overall, the Messe de Nostre Dame was an important part of the liturgical practices of the time, and it is still regarded as a masterpiece of medieval music and of all religious music.

String Quartet String Quartet - Level 2 - Digital Download

SKU: A0.1257044

Composed by Guillaume de Machaut, 1300-1377. Arranged by James M. Guthrie, ASCAP. Chamber,Contest,Early Music,Festival,Historic,Medieval. 38 pages. Jmsgu3 #850380. Published by jmsgu3 (A0.1257044).

1. Kyrie
2. Gloria
3. Credo
4. Sanctus
5. Agnus dei
6. Ite missa est

Guillaume de Machaut composed the Messe de Nostre Dame, also known as the Mass of Our Lady, in the early 1360s. He wrote the mass for the Cathedral at Reims, where he served as a canon, a permanent clergy member. According to a rubric found at the Cathedral, it would have likely been performed for the Saturday Lady Mass. 

Guillaume de Machaut's Messe de Nostre Dame is significant in the history of music for several reasons:

• It is the first complete setting of the Ordinary of the Mass by a single composer that has survived.
• It is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor.
• It was composed in four voices, which was unusual at the time.
• The texts of both Gloria and Credo are quite lengthy, and therefore Machaut set these movements in a style reminiscent of the earlier discant style, having short phrases, similar rhythmic motion in all parts, and a low ratio of notes per syllable of text, both ending with long, rhapsodic sections for the final word, Amen.

Machaut's Messe de Nostre Dame is a landmark in musical history, but it is far from being avant-garde merely for the sake of uniqueness. It is considered to be a culmination of the musical style of the Ars Nova period, which was characterized by complex polyphonic textures and rhythmic innovations. The mass is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. Overall, Machaut's Messe de Nostre Dame is a significant work that represents a culmination of the musical style of the Ars Nova period and reflects the changing attitudes towards religion and music during the 14th century. 

The mass consists of five movements: Kyrie, Gloria, Credo, Sanctus, and Agnus Dei, followed by the dismissal Ite, missa est. The tenor of the Kyrie is based on Vatican Kyrie IV, the Sanctus, and Agnus correspond to Vatican Mass XVII, and the Ite is on Sanctus VIII. The Gloria and Credo have no apparent chant basis, although they are stylistically related to one another. The mass is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor. The Messe de Nostre Dame is significant in the history of music because it is the first complete setting of the Ordinary of the Mass by a single composer that has survived. It is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. 

Overall, the Messe de Nostre Dame was an important part of the liturgical practices of the time, and it is still regarded as a masterpiece of medieval music and of all religious music.

Woodwind Ensemble,Woodwind Quartet - Level 2 - Digital Download

SKU: A0.1259372

Composed by Guillaume de Machaut, 1300-1377. Arranged by James M. Guthrie. Chamber,Contest,Early Music,Festival,Historic,Medieval. 38 pages. Jmsgu3 #852647. Published by jmsgu3 (A0.1259372).

INSTRUMENTATION: 2 Clarinets in Bb, 1 Alto Clarinet, 1 Bass Clarinet
1. Kyrie
2. Gloria
3. Credo
4. Sanctus
5. Agnus dei
6. Ite missa est

Guillaume de Machaut composed the Messe de Nostre Dame, also known as the Mass of Our Lady, in the early 1360s. He wrote the mass for the Cathedral at Reims, where he served as a canon, a permanent clergy member. According to a rubric found at the Cathedral, it would have likely been performed for the Saturday Lady Mass. 

Guillaume de Machaut's Messe de Nostre Dame is significant in the history of music for several reasons:

1. It is the first complete setting of the Ordinary of the Mass by a single composer that has survived.
2. It is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor.
3. It was composed in four voices, which was unusual at the time.
4. The texts of both Gloria and Credo are quite lengthy, and therefore Machaut set these movements in a style reminiscent of the earlier discant style, having short phrases, similar rhythmic motion in all parts, and a low ratio of notes per syllable of text, both ending with long, rhapsodic sections for the final word, Amen.

Machaut's Messe de Nostre Dame is a landmark in musical history, but it is far from being avant-garde merely for the sake of uniqueness. It is considered to be a culmination of the musical style of the Ars Nova period, which was characterized by complex polyphonic textures and rhythmic innovations. The mass is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. Overall, Machaut's Messe de Nostre Dame is a significant work that represents a culmination of the musical style of the Ars Nova period and reflects the changing attitudes towards religion and music during the 14th century. 

The mass consists of five movements: Kyrie, Gloria, Credo, Sanctus, and Agnus Dei, followed by the dismissal Ite, missa est. The tenor of the Kyrie is based on Vatican Kyrie IV, the Sanctus, and Agnus correspond to Vatican Mass XVII, and the Ite is on Sanctus VIII. The Gloria and Credo have no apparent chant basis, although they are stylistically related to one another. The mass is a unified mass, meaning that the composer selected relevant chants for each section as the borrowed tenor. The Messe de Nostre Dame is significant in the history of music because it is the first complete setting of the Ordinary of the Mass by a single composer that has survived. It is also significant because it was composed during a time of great political and social upheaval in Europe, and it reflects the changing attitudes towards religion and music during this period. 

Overall, the Messe de Nostre Dame was an important part of the liturgical practices of the time, and it is still regarded as a masterpiece of medieval music and of all religious music.