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"I just received my albums back and they are wonderful!!!!!! Music has always been a big part of our family life (especially the "Zither Hits" - it was played every night at dinner time...) - these recordings will be the best thing under the Christmas tree this year! Thank you so much for taking the extra time to clean up the recordings - ..."

Delay line, acoustic

A delay line, in which the delay is accomplished acoustically, as in a long tube with a speaker at one end and a microphone at the other.