| 摘要 |
A digital control system for establishing preset delays in firing a plurality of pneumatic sound sources. Predetermined firing command delays between system triggering and source triggering are set by appropriately setting each of a plurality of digital switches associated with the sources. As the elapsed time represented by a count in a command delay register and each of the predetermined delay times set by the switches becomes equal as determined by a coincidence detector, fire commands are generated for each of the sources. After the sources are fired, counts accumulated in firing delay registers associated with the sources are terminated and the counts, which correspond to the delays between triggering and actual firing of the sources, are displayed.
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