<PAGE>   1
                UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM 10-KA
                                   ----------

                ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                      THE SECURITIES EXCHANGE ACT OF 1934


For the fiscal year ended December 1996                    Omission file
                                                           number 2-22997


                                MILLS MUSIC TRUST
--------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)

               New York                                    13-6183792
--------------------------------------------------------------------------------
    (State or other jurisdiction of                     (I.R.S. Employer
     incorporation or organization)                     Identification No.)

c/o Marine Midland Bank, N.A., 140 Broadway, New York, NY 10015
--------------------------------------------------------------------------------
    (Address of principal executive offices)            (Zip code)

Registrant's telephone number, including area code (212) 658-6014
--------------------------------------------------------------------------------
Securities Registered Pursuant to Section 12(b) of the Act:

                                      NONE
--------------------------------------------------------------------------------
                                (Title of Class)

Securities Registered Pursuant to Section 12(g) of the Act:

                          UNITS OF BENEFICIAL INTEREST
--------------------------------------------------------------------------------
                                (Title of Class)

     Indicate by  check-mark  whether the  registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant  was required to file such report),  and (2) has been subject to such
filing requirements for at least the past 90 days.

                                    YES X   NO
                                       ---    ---
     As of March 20, 1997,  277,712 Trust Units were outstanding.  The aggregate
market  value of the  Units of  Mills  Music  Trust  held by  nonaffiliates  was
$11,663,904

                       DOCUMENTS INCORPORATED BY REFERENCE
                                      NONE



                                     PART I


<PAGE>   2


                                                                               2

                                                                         Page 2.


     The purpose of this amended  filing is to submit a Financial  Data Schedule
as required per item 601(c) of Regulation S-K and Regulation S-B and Rule 401 of
Regulation  S-T.  The  Financial  Data  Schedule  (Ex-27) was  missing  from the
original 10-K filing.



<PAGE>   3


                                                                               3




                                   SIGNATURES


     Pursuant  to the  requirements  of  Section  13 or 15(d) of the  Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.



                                                 MILLS MUSIC TRUST
                                                --------------------
                                                   (Registrant)


                                             By:   BERNARD D. FISCHMAN
                                                ------------------------
                                                   Bernard D. Fischman, 
Trustee


                                             By:    MARINE MIDLAND BANK
                                                ------------------------
                                                   Marine Midland Bank
                                                   Corporate Trustee




Dated as of May 22, 1997


     Pursuant to the  requirements of the Securities  Exchange Act of 1934, this
report  has  been  signed  below  by the  following  persons  on  behalf  of the
registrant and in the capacities and on the dates