EXHIBIT
      31.2





**CERTIFICATION**




I,
 
      Paul F. Norris, certify that:




1.
           I have reviewed this annual report on Form 10-K of
      Sonic Solutions;




2.
           Based on my knowledge, this annual report does not
      contain any untrue statement of a material fact or omit to state a material
      fact
      necessary to make the statements made, in light of the circumstances under
      which
      such statements were made, not misleading with respect to the period covered
      by
      this annual report;




3.
           Based on my knowledge, the financial statements, and
      other financial information included in this annual report, fairly present
      in
      all material respects the financial condition, results of operations and cash
      flows of the registrant as of, and for, the periods presented in this annual
      report;




4.
           The registrant's other certifying officer and I are
      responsible for establishing and maintaining disclosure controls and procedures
      (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control
      over financial reporting (as defined in Exchange Act Rules 13a-15(f) and
      15d-15(f)) for the registrant and have:




a)
      Designed such disclosure controls and procedures, or caused such disclosure
      controls and procedures to be designed under our supervision, to ensure that
      material information relating to the registrant, including its consolidated
      subsidiaries, is made known to us by others within those entities, particularly
      during the period in which this annual report is being prepared;




b)
      Designed such internal control over financial reporting, or caused such internal
      control over financial reporting to be designed under our supervision, to
      provide reasonable assurance regarding the reliability of financial reporting
      and the preparation of financial statements for external purposes in accordance
      with generally accepted accounting principles;




c)
      Evaluated the effectiveness of the registrant's disclosure controls and
      procedures and presented in this annual report our conclusions about the
      effectiveness of the disclosure controls and procedures, as of the end of the
      period covered by this annual report based on such evaluation; and




d)
      Disclosed in this annual report any change in the registrant’s internal control
      over financial reporting that occurred during the registrant’s most recent
      fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual
      report) that has materially affected, or is reasonably likely to materially
      affect, the registrant’s internal control over financial reporting;
      and





5. The registrant's other certifying officer and I have disclosed, based on
      our most recent evaluation of internal control over financial reporting, to
      the
      registrant's auditors and the audit committee of the registrant's board of
      directors (or persons performing the equivalent functions):




a)
      All
      significant deficiencies and material weaknesses in the design or operation
      of
      internal control over financial reporting which are reasonably likely to
      adversely affect the registrant's ability to record, process, summarize and
      report financial information; and




b)
      Any
      fraud, whether or not material, that involves management or other employees
      who
      have a significant role in the registrant's internal control over financial
      reporting.




June
      21,
      2008


/s/
                Paul F. NorrisPaul
                F. Norris
              Executive
                Vice President,Acting
                Chief Financial Officer
              and
                General Counsel