Exhibit 5


                                Hale and Dorr LLP
                               Counsellors at Law
                  60 State Street, Boston, Massachusetts 02109
                         617-526-6000 * FAX 617-526-5000


                               September 22, 1999


Avid Technology, Inc.
Metropolitan Technology Park
One Park West
Tewksbury, MA 01876

         Re:      Registration Statement on Form S-8
                  ----------------------------------

Ladies and Gentlemen:

         This  opinion is  furnished to you in  connection  with a  Registration
Statement on Form S-8 (the  "Registration  Statement") filed with the Securities
and Exchange  Commission (the "Commission") under the Securities Act of 1933, as
amended (the "Securities Act"), for the registration of 500,000 shares of Common
Stock,  $.01 par value per share (the  "Shares"),  of Avid  Technology,  Inc., a
Delaware  corporation (the  "Company"),  issuable under the Company's 1997 Stock
Incentive Plan (the "Plan").

         We have examined the  Certificate of  Incorporation  and By-Laws of the
Company,  each as  amended  and  restated  to date,  and  originals,  or  copies
certified to our  satisfaction,  of all pertinent records of the meetings of the
directors and stockholders of the Company,  the Registration  Statement and such
other  documents  relating  to the Company as we have  deemed  material  for the
purposes of this opinion.

         In  examination  of  the  foregoing  documents,  we  have  assumed  the
genuineness of all signatures, the authenticity of all documents submitted to us
as originals, the conformity to original documents of all documents submitted to
us as copies, the authenticity of the originals of such latter documents and the
legal competence of all signatories to such documents.

         We  express  no  opinion  herein  as  to  the  laws  of  any  state  or
jurisdiction other than the state laws of the Commonwealth of Massachusetts, the
Delaware  General  Corporation  Law statute  and the federal  laws of the United
States of America.






Avid Technology, Inc.
September 22, 1999
Page 2


         Based upon and subject to the foregoing, we are of the opinion that the
Shares have been duly  authorized  for issuance and the Shares,  when issued and
paid for in accordance with the terms of the Plan, will be validly issued, fully
paid and nonassessable.

         It is  understood  that this  opinion is to be used only in  connection
with the offer and sale of the Shares  while the  Registration  Statement  is in
effect.

         Please note that we are opining  only as to the matters  expressly  set
forth herein, and no opinion should be inferred as to any other matters.

         We hereby  consent to the filing of this opinion with the Commission as
an exhibit to the Registration  Statement in accordance with the requirements of
Item  601(b)(5)  of  Regulation  S-K under the  Securities  Act.  In giving such
consent,  we do not hereby  admit that we are in the  category of persons  whose
consent  is  required  under  Section 7 of the  Securities  Act or the rules and
regulations of the Commission.

                                                     Very truly yours,

                                                     /s/Hale and Dorr LLP

                                                     HALE AND DORR LLP