The track's production is characterized by its use of sweeping synths, arpeggiated leads, and a driving beat. The song's arrangement is carefully crafted to build tension and release, with the addition of layers and textures that add depth and complexity to the track.
When you listen to "Opus," your brain tells you that the song is speeding up. In reality, the project tempo stays at a rock-solid from start to finish. Eric Prydz achieves this legendary psychoacoustic illusion purely through MIDI programming and automation.
The track begins entirely muffled. Over several minutes, the low-pass filter slowly opens, allowing high-frequency harmonics to bleed in.
The melody eventually accelerates into rapid-fire 8th notes, followed by blistering 16th notes. Because the notes are hitting four to eight times faster than they did at the beginning of the track, your brain perceives a massive increase in speed, even though the master clock has not changed. 4. Automation: Bringing the MIDI to Life eric prydz opus midi
. Analyzing the MIDI and structure of this track reveals a masterclass in tension, release, and mathematical precision. Musical Theory and Structure The track is written in the
Few electronic music tracks in the 21st century have achieved the legendary status of Eric Prydz’s "Opus." Released in 2015, this progressive house masterpiece is celebrated for its unique, boundary-pushing arrangement. At the heart of its hypnotic, emotional power is a deceptively simple mathematical progression.
The defining element of "Opus" is its main arpeggio. If you look at the MIDI file of this melody, you will notice it is built on a specific interrogative pattern. The track's production is characterized by its use
In the original track, the tempo literally increases. It starts around 126 BPM and accelerates to 132 BPM by the climax. Most DAWs allow you to automate the master tempo. If your MIDI clip is fixed, stretch it via "Warp" (Ableton) or "Time Stretch" (FL Studio) to match the accelerating grid.
and gradually accelerates over roughly 3 minutes and 42 seconds to a final tempo of Instrumentation: MIDI recreations typically include 4 to 7 channels: The hypnotic, evolving ostinato that carries the melody.
The iconic moment in Opus is when the 16th-note arpeggio enters. Create a secondary MIDI track using the same chords but arpeggiated upwards. Use a MIDI effect (like Ableton's Arpeggiator set to "Up" with a rate of 1/16th) or manually draw the notes. The contrast between the slow chord pad and the fast arpeggio is what creates euphoria. In reality, the project tempo stays at a
In the early stages of the MIDI sequence, heavy reverb helps fill the gaps between the slow notes. As the sequence accelerates, you’ll want to automate the reverb "Dry/Wet" mix down so the fast notes stay "plucky" and defined. 4. Why This MIDI is a Learning Tool
Having the correct MIDI notes for "Opus" is only half the battle; the sound design is what breathes life into the sequence. Eric Prydz is known for using hardware synths (like the Sequential Circuits Prophet) as well as powerful software plugins. The Pluck Layer (The Foundation) A mixture of Saw and Square waves. Filter: A low-pass filter with a fast decay envelope.
The sound transitions from a muted pluck into a massive, screaming lead. This is achieved entirely through filter automation.