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.
  February
        25, 2008
 /s/
                      Paul F. Norris
                    
                    Paul
                      F. Norris
                    Executive
                      Vice President and
                    Interim
                      Chief Financial Officer