According to Cowboy Jack Clement, who took over production duties from Sam Phillips, "There's two heads; one records, and one plays back. The sound comes along and it's recorded on this head, and a split second later, it goes to the playback head. But you can take that and loop it to where it plays a split second after it was recorded and it flips right back into the record head. Or, you can have a separate machine and do that. if you do it on one machine, you have to echo everything." In more technical terms a tape delay and a 7-ips, instead of the more advanced 15-ips. The recordings were thus an idealized representation of the customary live sound.