I have three recommendations for modern classical music that I find more approachable:
1. Arvo Part's Cantus In Memoriam Benjamin Britten - Fratres - Tabula Rasa - Spiegel im Spiegel
2. Schoenberg's String Quartets 1 to 4 (Phillips Classics)
3. Messiaen's Preludes - Etudes - Canteyodjaya (Arte Nova Classics)
Please bear with my stumbling through this - I am a psychologist and not a musicologist and my comments come from past reading (which is distant) and recent listening.
Part is probably the most approachable as the works mentioned above and are based on his studies of Gregorian Chant and Renaissance music. Part's later music (mentioned above) is based on simple harmonies, single notes, and triad chords.
It has taken a little time to appreciate Schoenberg, but in retrospect, it was time well spent. Schoenberg's four String Quartets have both "atonal" and "tonal" features, depending on the quartet. The 12 tone technique, serialism and "atonality" are distinct in the 2nd and 3rd quartet. The third quartet, in particular, has series that cannot be followed (anticipated) and consists of rhythmic patterns that are not fixed. For me, it is the lack of predictability in music that ultimately holds together that is interesting. My wife listened to it tonight and commented that the music sounds like an orchestra tuning instruments before playing. However, to me, after listening to his music for a while, each piece does make sense, although I'm not able to explain how. All of the four quartets are fruitful and fulfilling, especially the 3rd. I also maintain that this music can produce an anxious state which is interesting in itself.
IMO, Messiaen's work is probably the hardest of the three that I suggested to appreciate. His music is rhythmically complex and is based on scales with steps that he developed. His music also has influences from the rhythms from ancient Greek and from Hindu sources. In Etudes, he takes Schoenberg's technique further by introducing serialism of timbres, intensities and durations. That is, these become recurring series of elements that are manipulated throughout the piece.
1. Arvo Part's Cantus In Memoriam Benjamin Britten - Fratres - Tabula Rasa - Spiegel im Spiegel
2. Schoenberg's String Quartets 1 to 4 (Phillips Classics)
3. Messiaen's Preludes - Etudes - Canteyodjaya (Arte Nova Classics)
Please bear with my stumbling through this - I am a psychologist and not a musicologist and my comments come from past reading (which is distant) and recent listening.
Part is probably the most approachable as the works mentioned above and are based on his studies of Gregorian Chant and Renaissance music. Part's later music (mentioned above) is based on simple harmonies, single notes, and triad chords.
It has taken a little time to appreciate Schoenberg, but in retrospect, it was time well spent. Schoenberg's four String Quartets have both "atonal" and "tonal" features, depending on the quartet. The 12 tone technique, serialism and "atonality" are distinct in the 2nd and 3rd quartet. The third quartet, in particular, has series that cannot be followed (anticipated) and consists of rhythmic patterns that are not fixed. For me, it is the lack of predictability in music that ultimately holds together that is interesting. My wife listened to it tonight and commented that the music sounds like an orchestra tuning instruments before playing. However, to me, after listening to his music for a while, each piece does make sense, although I'm not able to explain how. All of the four quartets are fruitful and fulfilling, especially the 3rd. I also maintain that this music can produce an anxious state which is interesting in itself.
IMO, Messiaen's work is probably the hardest of the three that I suggested to appreciate. His music is rhythmically complex and is based on scales with steps that he developed. His music also has influences from the rhythms from ancient Greek and from Hindu sources. In Etudes, he takes Schoenberg's technique further by introducing serialism of timbres, intensities and durations. That is, these become recurring series of elements that are manipulated throughout the piece.

