Mario Lavista (b. 1943) is a dominant figure in Mexican classical music. In the second half of the twentieth century, he promoted the use of contemporary techniques, leading to a series of collaborations with expert instrumentalists to explore extended techniques. Marsias for Oboe and Crystal Glasses is one of those pieces. Due to the nature of contemporary techniques, different oboes and reed styles produce different effects with the same fingerings. This document analyzes the contemporary fingerings in the two published editions of the work in consideration of the long-scrape reed style and oboes commonly used in the United States. The contemporary techniques were played on twelve professional oboe models as a way to collect data on how the printed fingerings work. The data is the foundation for the performance guide, which details every contemporary technique in the work. The performance guide also provides comprehensive information about the crystal glass logistics. The document also presents an electronic accompaniment created with Max/MSP in the event that the crystal glasses or crystal glass players are unavailable.