While students of American a cappella history can find many re-issues of gospel groups from the 1930's and beyond, this import from Austria is one of the few that captures the music from the roaring '20s. Of the four groups represented here, The Sunset Four were most productive with 13 of the 25 songs on CD They have snippets of future bass imitation on 'Jerusalem Morn' and barbershop - like chord ringing on 'Didn't He Ramble.' But perhaps 'Barnum's Steam Calliope' is most notable, for its unique vocal imitation of the famed circus instrument. The audio quality reflects the fact that old (and sometimes scratched) '78s were used to make the CD, but anyone interested in early 20th Century a cappella will happily overlook those flaws because of the unique performances captured here, all but two are a cappella.