outdoor performances not held under arches. Live techniques In recent years, with the advent of more advanced audio equipment and the ability of a cappella groups to attract income with live performances for pay, there has been increased exploration into the importance of microphones. Whereas groups at schools with older campuses find themselves with arches and naturally acoustically accentuated spaces in which to perform, many groups find themselves lacking spaces such as these. As has been documented and encouraged by various a cappella organizations, such as CASA, Varsity Vocals, and The A Cappella Blog, individual microphone use for each member of an ensemble has risen in popularity, allowing for, as Mike Chin of the A Cappella Blog states, a “big,” “clear,” “crisp” sound in an otherwise acoustically dull performance space. In addition, the use of individual microphones allows for added effects to be applied to a group's live vocals, such as adding a digital lower octave (or "octavizing") the bass vocalist to produce a tone that is outside the natural range of most singers. The integration of these technological advancements continues to shape the sound of modern a cappella music at the college level and beyond. Group structure and culture Most collegiate a cappella groups, whether all-male identifying, all-female identifying, or mixed, share similar traits. The groups often benefit from the talent of non-music majors who have significant experience with music, choral singing, or both. Participation in such groups provides both a social and creative outlet for students who are pursuing other academic fields. Groups are generally self-sustaining and often entirely run by students. Some groups receive financial support from their educational institution while others are entirely self-supporting. Unlike professional groups, which typically have four to seven members, collegiate groups typically perform with eight to sixteen members, with full group rosters measuring up to 30 members in some cases. This large roster size is often driven by necessity, as college groups tend to see high turnover due to graduation and changing student commitments. A large member count enables a group to maintain continuity over time and it also affects the group's aural aesthetic. For example, a large group may be able to perform arrangements that have more than a dozen separate parts, an impossible feat for smaller groups. Some groups record albums of their music, typically at intervals of two or three years. The quality of such albums has recently