Black Sheep Time MakerBlack Sheep Time Maker Advanced Stereo Delay pedal with Tap Tempo, Sample Hold and USB _____ In the 1920s, people started experementing with delay effects by sending audio signals back and forth through telephone lines. Listening to the original sound source and the signal coming back over the telephone line simultaneously caused the first ever artificial delay effect. In the late 1940s, sound engineers started to use magnetic tape decks for delay and