Patent ID: 6914990

Claim:
A volume adjusting apparatus comprising: a plurality of sound inputting terminals for respectively inputting sound elements; a plurality of volume setting means respectively connected with said sound inputting terminals to respectively set volume levels of said sound elements inputted by said sound inputting terminals; and a plurality of sound outputting terminals for respectively outputting said sound elements at said volume levels respectively set by said volume setting means; whereby said volume adjusting apparatus further comprises: timer means for outputting a trigger signal at a time interval; a plurality of volume envelope generating means respectively corresponding to said volume setting means for selectively generating volume envelope values for respective volume setting means in accordance with predetermined envelope forms in response to said trigger signal outputted by said timer means at said time interval; and control means for inputting volume envelope values for respective volume setting means respectively generated by said volume envelope generating means in response to said trigger signal outputted by said timer means at said time interval, selectively generating target flag data elements on the basis of differences of said volume envelope values for target volume setting means at said time interval for said volume envelope values changed at said time interval for said target volume setting means and generating non-target flag data elements for non-target volume setting means other than said target volume setting means at said time interval for said volume envelope values unchanged at said time interval for non-target volume setting means other than said target volume setting means, searching said target flag data elements from among said flag data elements thus generated to determine target volume setting means respectively corresponding to target volume envelope generating means which respectively generated volume envelope values changed at said time interval for said target volume setting means, and respectively outputting said target flag data elements to said target volume setting means in response to said trigger signal outputted by said timer means at said time interval; and said target volume setting means are operative to respectively set said volume levels of target sound elements inputted by target sound inputting terminals in accordance with said target flag data elements outputted by said control means.