SONIC SOLUTIONS/CA/
SC 13G, 1999-02-16
COMPUTER INTEGRATED SYSTEMS DESIGN
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                                        
                                                        
                                  SCHEDULE 13G                   


                   UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO.___)*



                              SONIC SOLUTIONS, INC.
- --------------------------------------------------------------------------------
                                (Name of Issuer)


                          COMMON STOCK, Par Value $.01
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                   835460 10 6
- --------------------------------------------------------------------------------
                                 (CUSIP Number)



Check the following box if a fee is being paid with this statement [ ]. (A fee
is not required only if the filing person: (1) has a previous statement on file
reporting beneficial ownership of more than five percent of the class of
securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7).

                       (Continued on the following pages)

                              (Page 1 of 4 Pages)

- ------------------------
*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).






                                     Page 1


<PAGE>   2


- ---------------------                                          -----------------
CUSIP NO. 835460 10 6             SCHEDULE 13G                 Page 2 of 4 Pages
- --------------------------------------------------------------------------------
1.     NAME OF REPORTING PERSON
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


       Advent VI L.P.                                          51-0309893    
       Advent Atlantic and Pacific II L.P.                     04-3123521 
       Advent New York L.P.                                    04-3095408 
       Advent Industrial II L.P.                               51-0314268 
       TA Venture Investors L.P.                               04-3068354 
- --------------------------------------------------------------------------------
2.     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                 (a) [X]
                                                                         (b) [ ]

- --------------------------------------------------------------------------------
3.     SEC USE ONLY


- --------------------------------------------------------------------------------
4.     CITIZENSHIP OR PLACE OF ORGANIZATION
       
            
       Advent VI L.P.                                            Delaware 
       Advent Atlantic and Pacific II L.P.                       Delaware 
       Advent New York L.P.                                      Delaware 
       Advent Industrial II L.P.                                 Delaware 
       TA Venture Investors L.P.                            Massachusetts 
- --------------------------------------------------------------------------------
                   5.  SOLE VOTING POWER

                                                                     
                       Advent VI L.P.                             298,257
                       Advent Atlantic and Pacific II L.P.        136,590
                       Advent New York L.P.                        37,283
                       Advent Industrial II L.P.                   49,242
                       TA Venture Investors                         4,472
     NUMBER OF     -------------------------------------------------------------
      SHARES       6.  SHARED VOTING POWER
   BENEFICIALLY
     OWNED BY          N/A
       EACH        -------------------------------------------------------------
    REPORTING      7.  SOLE DISPOSITIVE POWER
      PERSON
       WITH:           Advent VI L.P.                             298,257
                       Advent Atlantic and Pacific II L.P.        136,590
                       Advent New York L.P.                        37,283
                       Advent Industrial II L.P.                   49,242
                       TA Venture Investors                         4,472
                   -------------------------------------------------------------
                   8.  SHARED DISPOSITIVE POWER

                       N/A
- --------------------------------------------------------------------------------
9.     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       
       Advent VI L.P.                                             298,257
       Advent Atlantic and Pacific II L.P.                        136,590
       Advent New York L.P.                                        37,283
       Advent Industrial II L.P.                                   49,242
       TA Venture Investors L.P.                                    4,472
- --------------------------------------------------------------------------------
10.    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

                                                                            [ ]
- --------------------------------------------------------------------------------
11.    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

              
       Advent VI L.P.                                                3.35%
       Advent Atlantic and Pacific II L.P.                           1.53%
       Advent New York L.P.                                          0.42%
       Advent Industrial II L.P.                                     0.55%
       TA Venture Investors L.P.                                     0.05%
- --------------------------------------------------------------------------------
12.    TYPE OF REPORTING PERSON


       Each entity is a Limited Partnership
- --------------------------------------------------------------------------------
                       SEE INSTRUCTION BEFORE FILLING OUT!


<PAGE>   3

ATTACHMENT TO FORM 13G                                                    Page 3


ITEM 1(a)    NAME OF ISSUER: Sonic Solutions, Inc.

ITEM 1(b)    ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
             101 Rowland Way
             Novato, CA  94945

ITEM 2(a)    NAME OF PERSON FILING:
             Advent VI L.P.
             Advent Atlantic and Pacific II L.P.
             Advent New York L.P.
             Advent Industrial II L.P.
             TA Venture Investors Limited Partnership

ITEM 2(b)    ADDRESS OF PRINCIPAL BUSINESS OFFICE:
             c/o TA Associates
             125 High Street, Suite 2500
             Boston, MA 02110

ITEM 2(c)    CITIZENSHIP: Not Applicable

ITEM 2(d)    TITLE AND CLASS OF SECURITIES: Common

ITEM 2(e)    CUSIP NUMBER: 835460 10 6

ITEM 3       IF THIS STATEMENT IS FILED PURSUANT TO RULES 13d-1(b) OR 13d-2(b),
             CHECK WHETHER THE PERSON FILING IS A: Not Applicable

ITEM 4       OWNERSHIP
ITEM 4(a)    AMOUNT BENEFICIALLY OWNED:                            COMMON STOCK
                                                                   ------------
             Advent VI L.P.                                             298,257
             Advent Atlantic and Pacific II L.P.                        136,590
             Advent New York L.P.                                        37,283
             Advent Industrial II L.P.                                   49,242
             TA Venture Investors Limited Partnership                     4,472

ITEM 4(b)    PERCENT OF CLASS                                        PERCENTAGE
                                                                     ----------
             Advent VI L.P.                                               3.35%
             Advent Atlantic and Pacific II L.P.                          1.53%
             Advent New York L.P.                                         0.42%
             Advent Industrial II L.P.                                    0.55%
             TA Venture Investors Limited Partnership                     0.05%

ITEM 4(c)    NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS:
             (i) SOLE POWER TO VOTE OR DIRECT THE VOTE:            COMMON STOCK
                                                                   ------------
             Advent VI L.P.                                             298,257
             Advent Atlantic and Pacific II L.P.                        136,590
             Advent New York L.P.                                        37,283
             Advent Industrial II L.P.                                   49,242
             TA Venture Investors Limited Partnership                     4,472

             (ii) SHARED POWER TO VOTE OR DIRECT THE VOTE:                  N/A

             (iii) SOLE POWER TO DISPOSE OR DIRECT THE
                   DISPOSITION:                                    COMMON STOCK
                                                                   ------------
             Advent VI L.P.                                             298,257
             Advent Atlantic and Pacific II L.P.                        136,590
             Advent New York L.P.                                        37,283
             Advent Industrial II L.P                                    49,242
             TA Venture Investors Limited Partnership                     4,472

             (iv) SHARED POWER TO DISPOSE OR DIRECT 
                  THE DISPOSITION:                                          N/A



<PAGE>   4
                                                                          Page 4



ITEM 5       OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS: Not Applicable

ITEM 6       OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON: 
             Not Applicable

ITEM 7       IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY THAT ACQUIRED
             THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY:
             Not Applicable

ITEM 8       IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP:
             This schedule 13G is filed pursuant to Rule 13d-1(c). For the
             agreement of group members to a joint filing, see below.

ITEM 9       NOTICE OF DISSOLUTION OF GROUP: Not Applicable

ITEM 10      CERTIFICATION: Not Applicable



SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.


AGREEMENT FOR JOINT FILING
Advent VI L.P., Advent Atlantic and Pacific II L.P., Advent New York L.P.,
Advent Industrial II L.P. and TA Venture Investors Limited Partnership hereby
agree that TA Associates shall file with the Securities and Exchange Commission
a joint schedule 13G on behalf of the above-named parties concerning their
beneficial ownership of Sonic Solutions, Inc.

Dated:

ADVENT VI L.P.
By: TA Associates VI L.P., its General Partner
By: TA Associates, Inc. its General Partner

By: 
    ---------------------------------------------------
    Katherine S. Cromwell, Managing Director


ADVENT ATLANTIC AND PACIFIC II L.P.
By: TA Associates AAP II Partners L.P., its General Partner
By: TA Associates, Inc. its General Partner

By: 
    ---------------------------------------------------
    Katherine S. Cromwell, Managing Director


ADVENT NEW YORK L.P.
By: TA Associates VI L.P., its General Partner
By: TA Associates, Inc. its General Partner

By: 
    ---------------------------------------------------
    Katherine S. Cromwell, Managing Director


ADVENT INDUSTRIAL  II L.P.
By: TA Associates VI L.P., its General Partner
By: TA Associates, Inc. its General Partner

By: 
    ---------------------------------------------------
    Katherine S. Cromwell, Managing Director


TA VENTURE INVESTORS LIMITED PARTNERSHIP

By: 
    ---------------------------------------------------
    Katherine S. Cromwell, General Partner







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