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.




May 29,
2009





/s/
      Paul F. NorrisPaul
      F. NorrisExecutive
      Vice President, Acting Chief Financial Officerand
      General Counsel