Exhibit 3.11


                           CERTIFICATE OF AMENDMENT
              BY SHAREHOLDERS TO THE ARTICLES OF INCORPORATION OF


                           Ohio Sound & Music, Inc.
- --------------------------------------------------------------------------------
                             (Name of Corporation)

              Carl J. Tippit                  , who is:
- ----------------------------------------------
[_] Chairman of the Board  [X] President [_] Vice President  (Please check one.)
 
and           Neil McGinness                  , who is:
   -------------------------------------------               
     [X] Secretary        [_] Assistant Secretary  (Please check one.)

of the above named Ohio corporation organized for profit does hereby certify
that:  (Please check the appropriate box and complete the appropriate
statements.)

[X]  a meeting of the shareholders was duly called for the purpose of adopting
     this amendment and held on August 19, 1997 at which meeting a quorum of the
     shareholders was present in person or by proxy, and by the affirmative vote
     of the holders of shares entitled them to exercise 100% of the voting power
     of the corporation.

[_]  in a writing signed by all of the shareholders who would be entitled to
     notice of a meeting held for that purpose, the following resolution to
     amend the articles was adopted:
     
         See Attached



     IN WITNESS WHEREOF, the above named officers, acting for and on the behalf
of the corporation, have hereunto subscribed their names this 10/th/ day of
September, 1997.


By   /s/ Carl J. Tippit                      By   /s/ Neil McGinness
   -------------------------------------        --------------------------------
   (Chairman, President, Vice President)        (Secretary, Assistant Secretary)

NOTE:  OHIO LAW DOES NOT PERMIT ONE OFFICER TO SIGN IN TWO CAPACITIES, TWO
SEPARATE SIGNATURES ARE REQUIRED, EVEN IF THIS NECESSITATES THE ELECTION OF A
SECOND OFFICER BEFORE THE FILING CAN BE MADE.

 
                                   ARTICLE I
                                   ---------



           The name of the Corporation shall be BUSINESS SOUND, INC.

 
     IN WITNESS WHEREOF, this Amended and Restated Limited Liability Company
Agreement has been duly executed on the day and year first above written.


                              MUZAK HOLDINGS LLC


                              By: /s/ Royce Yudkoff
                                 --------------------------------
                                  Name:  Royce Yudkoff
                                  Title: Vice President