Exhibit 99.1

Sonic Solutions Reports Results for Fourth Quarter and Fiscal Year Ended
                            March 31, 2005;
 Record Revenues Drive Profitable First Full Quarter of Roxio/Sonic Integration

    NOVATO, Calif.--(BUSINESS WIRE)--May 16, 2005--Sonic Solutions
(NASDAQ:SNIC) ("Sonic") announced today its financial results for the
fourth quarter and fiscal year ended March 31, 2005.

                       Summary Financial Results
               (in thousands, except per share amounts)


                                                      Twelve Months
                              Three Months Ended           Ended
                                  March 31,              March 31,

                            2005     2005     2004     2005     2004
                         (Non-GAAP) (GAAP)   (GAAP)   (GAAP)   (GAAP)
                          -------- -------- -------- -------- --------

Net revenue               $37,475  $35,604  $17,302  $90,627  $56,853
Net income                 $7,505   $1,220   $4,336   $8,363  $11,084
                          ======== ======== ======== ======== ========

  Net income per diluted
  share                     $0.28    $0.05    $0.17    $0.32   $0. 46
                          ======== ======== ======== ======== ========

    On the basis of generally accepted accounting principles ("GAAP"),
net revenue for the quarter was $35,604,000 compared to $17,302,000
for the same period in the prior fiscal year. Net income for the
quarter was $1,220,000, or $0.05 per diluted share, compared to net
income of $4,336,000, or $0.17 per diluted share, for the same period
in the prior fiscal year.
    On a GAAP basis, net revenue for the fiscal year ended March 31,
2005 was $90,627,000 compared to $56,853,000 for the prior fiscal
year. Net income for the fiscal year was $8,363,000, or $0.32 per
diluted share, compared to net income of $11,084,000, or $0.46 per
diluted share, for the prior fiscal year.
    On a non-GAAP basis, net revenue for the quarter was $37,475,000,
net income was $7,505,000 and net income per diluted share was $0.28.

    Non-GAAP Presentation

    During the quarter ended December 31, 2004, and as previously
announced, Sonic acquired substantially all of the assets and
liabilities of the Consumer Software Division of Roxio, Inc. In this
press release, Sonic provides certain adjustments to financial
information calculated on the basis of GAAP as supplemental
information relating to its results of operations. These non-GAAP
financial measures include non-GAAP net revenue, net income, diluted
earnings per share, and gross profit and margin figures, which exclude
certain expense items associated with the acquisition and include
certain revenue associated with the sale of Roxio products, each as
more fully described below. The non-GAAP financial measures also
exclude the third party costs incurred by Sonic in the fourth quarter
in connection with Sonic's implementation of the requirements of
Section 404 of the Sarbanes-Oxley Act (see "SOX Compliance" below).
Management believes that this non-GAAP presentation allows investors
to better understand the operating results of Sonic for the quarter
ended March 31, 2005 because this presentation excludes non-recurring
acquisition-related charges and other non-recurring expenses, includes
revenue-related items management considers meaningful and provides
insight into how management evaluates operating results. In addition,
Sonic has reported similar non-GAAP results in the past and believes
the inclusion of this non-GAAP presentation provides consistency in
its financial reporting. However, these non-GAAP measures should not
be considered in isolation from, or as a substitute for, financial
information presented in compliance with GAAP, and other companies may
use different non-GAAP measures and presentations of results.

    The non-GAAP presentation adjusts the following items:

    Revenue. Under purchase accounting rules, Original Equipment
Manufacturer ("OEM") royalties received by Sonic on account of Roxio's
business may be included in revenue only if they reflect OEM shipments
occurring after the date of the acquisition (December 17, 2004). The
non-GAAP presentation includes in revenue royalties for which Sonic
received reports of shipments from OEMs after December 17, 2004 for
shipments prior to December 17, 2004 and for which Sonic has invoiced
the OEMs and expects to collect the amounts due in cash. Sonic has
also excluded in the non-GAAP presentation an end of life reserve
related to shipments of Easy Media Creator 7.0, which Sonic shipped to
and invoiced distributors during the fourth quarter and expects to
collect the amounts due in cash but was not able to record the revenue
due to the pending launch of Easy Media Creator 7.5 (see below).
    Acquisition-Related Intangible Amortization. Under purchase
accounting rules, some portion of the acquisition purchase price is
allocated to intangibles, such as core and developed technology and
customer contracts, which are then amortized over various periods of
time. The GAAP presentation includes amortization on all acquired
intangibles. These non-cash charges are eliminated in the non-GAAP
presentation in calculating operating income.
    Easy Media Creator 7.5 Launch Expenses. After completion of the
acquisition, Sonic immediately began preparations for a previously
unplanned release of a new version of Easy Media Creator. The Roxio
organization had been planning to release a new version of Easy Media
Creator in the fall of 2005. Sonic management took this step because
it believed that an early release of a new version of Easy Media
Creator, incorporating some Sonic technology and identifiable
branding, would accelerate integration of the Roxio business into
Sonic both from a market as well as an internal organizational
perspective. The incremental costs of this release, including the
related end of life reserve discussed above, are included in the GAAP
presentation and excluded in the non-GAAP presentation.
    Third-Party Expenses Related to Compliance with the Sarbanes-Oxley
Act of 2002 ("SOX"). The third-party expenses related to SOX
compliance work for the 2005 fiscal year are included in the GAAP
presentation and excluded in the non-GAAP presentation. The expenses
excluded in the non-GAAP presentation are primarily the fees paid to
compliance consultants and to Sonic's external auditors for work in
connection with Sonic's SOX compliance. As discussed further below,
Sonic management believes that SOX compliance efforts were
significantly complicated by the impact of the Roxio acquisition,
including management's decision to migrate Sonic's accounting into
systems that were acquired as part of the Roxio combination. Hence,
Sonic management believes the level of SOX expenses is extraordinary
and is unlikely to recur in future periods.
    Business Integration Expenses. Certain charges that occurred at or
around the time of an acquisition, and that are not expected to recur,
are considered to be non-recurring charges. The non-GAAP presentation
eliminates these charges included in operating expense.

    Guidance

    For its fiscal quarter ending June 30, 2005, Sonic anticipates
GAAP revenues to be in the range of $32 million to $34 million and
GAAP fully diluted earnings to be between $0.13 and $0.15 per share.
    Sonic is maintaining our prior fiscal year 2006 guidance, for its
fiscal year ending March 31, 2006, Sonic anticipates GAAP revenues to
be in the range of $155 million to $165 million and GAAP fully diluted
earnings to be between $1.20 and $1.30 per share.

    SOX Compliance

    The SEC's rules implementing Section 404 of the Sarbanes-Oxley Act
of 2002 require Sonic management to assess the effectiveness of its
internal control over financial reporting annually, and to include in
Sonic's Annual Report on Form 10-K for the fiscal year ended March 31,
2005 and subsequent years a management report on that assessment,
together with an opinion thereon by Sonic's independent registered
public accounting firm. Sonic expects to comply with these disclosure
requirements on a timely basis. Management is in the process of
reviewing internal control systems and, in connection with this
evaluation, has identified certain deficiencies. Although none of
these deficiencies have been identified as a significant deficiency or
material weakness at this time, the evaluation of internal control
over financial reporting is not yet complete and there can be no
assurance that, as a result of the ongoing evaluation, additional
deficiencies will not be identified or that any deficiencies
identified, either alone or in combination with others, will not be
considered a significant deficiency or a material weakness. Although
certain remediation efforts have been undertaken, any deficiency or
weakness will not be considered effectively remediated until new
internal controls are operational for a period of time and are tested,
and management and Sonic's independent registered public accounting
firm conclude that these controls are operating effectively. As a
result of the recent Roxio acquisition, management has actively been
working to integrate the operations of the acquired business,
particularly with respect to accounting, accounting systems and
financial reporting. In part due to these acquisition and integration
efforts, many of Sonic's processes and procedures in these areas have
been recently restructured, and the evaluations relate to the
restructured process and procedures. Due to the nature of and the time
necessary to effectively remediate and test each of the deficiencies
identified to date, Sonic expects to conclude that some of the
deficiencies identified to date had not been effectively remediated as
of March 31, 2005.
    At this time, management does not believe that the results of its
evaluation of internal control over financial reporting will preclude
an unqualified opinion from Sonic's auditor with respect to the annual
financial statements; however, there can be no assurance that the
results of such evaluation will not cause an adjustment to the
financial statements to be included in the Annual Report on Form 10-K.
    Further, while at this time Sonic has completed a review with its
independent auditors of the financial statements presented in this
press release, the dependency of the evaluation of internal controls
mentioned above, as well as lack of completion of all financial audit
test procedures means that the presentation contained in this press
release is unaudited and subject to further change prior to the filing
of Sonic's Annual Report on Form 10-K.
    Sonic will hold its fourth quarter and fiscal year ended March 31,
2005 earnings conference call on Monday, May 16, 2005 at 1:30 p.m.
(PDT)/4:30 p.m. (EDT). Investors are invited to listen to Sonic's
conference call on the investor section of the Sonic Web site at
www.sonic.com. A replay of the call also will be available via webcast
at www.sonic.com.


                            Sonic Solutions
                   Condensed Statement of Operations
               (in thousands, except per share amounts)


                         Three Months Ended      Twelve Months Ended
                              March 31,               March 31,
                            2005          2004          2005   2004(a)
                      ----------- ------------- ------------- --------
                      (unaudited)   (unaudited)   (unaudited)
Net Revenue              $35,604       $17,302       $90,627  $56,853

Cost of Revenue            7,376         1,917        13,373    7,052
                      ----------- ------------- ------------- --------

Gross Profit              28,228        15,385        77,254   49,801
                      ----------- ------------- ------------- --------

Operating expenses
Marketing and sales        9,028         3,343        21,179   12,629
Research and
 development              10,523         5,724        31,681   19,731
General and
 administrative            5,607         1,466         9,867    4,668
Acquired in-process
 technology                    0             0         3,100        0
Business integration       1,103             0         2,190        0
                      ----------- ------------- ------------- --------
   Total operating
    expenses              26,261        10,533        68,017   37,028
                      ----------- ------------- ------------- --------
   Operating income        1,967         4,852         9,237   12,773

Other income
 (expense), net             (378)          136           218      237
                      ----------- ------------- ------------- --------

   Income before
    income taxes           1,589         4,988         9,455   13,010
Provision for income
 taxes                       369           652         1,092    1,926
                      ----------- ------------- ------------- --------

   Net income             $1,220        $4,336        $8,363  $11,084
                      =========== ============= ============= ========
   Net income per
    share applicable
    to common
         Shareholders:
       Basic               $0.05         $0.20         $0.36    $0.54
                      =========== ============= ============= ========
       Diluted             $0.05         $0.17         $0.32    $0.46
                      =========== ============= ============= ========

   Shares used in
    computing net income
    per share:

       Basic              24,303        21,766        23,346   20,459
                      =========== ============= ============= ========
       Diluted            26,979        25,917        26,022   23,889
                      =========== ============= ============= ========


(a) March 31, 2004 balances are derived from the audited financial
statements included in the Company's 2004 Annual Report on Form 10-K.


                            Sonic Solutions
                       Condensed Balance Sheets
                            (in thousands)



                                                   March 31, March 31,
                                                     2005      2004(a)
                                                  (unaudited)
                                                   -------------------
Assets
Current assets:
    Cash, cash equivalents and investments           $35,436  $36,182
    Accounts receivable, net of allowance for
     returns and doubtful accounts of
     $243 and $10,377, at March 31, 2004 and
     2005, respectively                               12,839    9,443
    Unbilled receivables                                 121        0
    Inventory                                            755      560
    Prepaid expenses and other current assets          2,106    1,399
                                                   ---------- --------
    Total current assets                              51,257   47,584
                                                   ---------- --------
Fixed assets, net                                      6,544    3,610
Purchased and internally developed software costs,
 net                                                   1,573    1,042
Acquired intangibles                                  55,164    2,898
Goodwill                                              49,046   15,533
Other assets                                           2,610      278
                                                   ---------- --------
    Total assets                                    $166,194  $70,945
                                                   ========== ========
Liabilities and Shareholders' Equity
Current liabilities:
    Accounts payable                                  $9,087   $1,145
    Accrued liabilities                               19,250    8,977
    Deferred revenue and deposits                      5,176    4,965
    Capital leases                                        84       60
                                                   ---------- --------
    Total current liabilities                         33,597   15,147
                                                   ---------- --------
Bank note payable                                     30,000        0
Other long term liabilities                            2,556        0
Deferred revenue, net of current portion                 756        0
Capital lease, net of current portion                     41       75
                                                   ---------- --------
    Total liabilities                                 66,950   15,222
Shareholders' equity:
    Common stock                                     106,410   70,994
    Cumulative foreign translation adjustment           (274)     (16)
    Accumulated deficit                               (6,892) (15,255)
                                                   ---------- --------
    Total shareholders' equity                        99,244   55,723
                                                   ---------- --------
    Total liabilities and shareholders' equity      $166,194  $70,945
                                                   ========== ========

(a) March 31, 2004 balances are derived from the audited financial
statements included in the Company's 2004 Annual Report on Form 10-K.


                            Sonic Solutions
             Reconciliation of Reported Operating Results
                     to Non-GAAP Operating Results
  (in thousands, except per share amounts and percentages, unaudited)


                                                    Three Months Ended
                                                          March 31,
                                                       2005      2004
                                                    -------- ---------

  Reported revenue                                  $35,604   $17,302

  Adjustment:
  CSD royalty reports received after December 17,
   2004 for OEM shipments prior to December 17, 2004    380         0

  CSD end of life reserve                             1,491         0
                                                    -------- ---------

  Non GAAP revenue                                  $37,475   $17,302
                                                    ======== =========

Non GAAP gross profit                               $31,215   $15,385

Non GAAP gross margin                                  83.3%     88.9%


       GAAP Operating income                         $1,967    $4,852

       GAAP Net income                                1,220     4,336

  Adjustments:
  CSD end of life reserve                             1,491         0
  CSD royalty reports received after December 17,
   2004 for OEM shipments prior to December 17, 2004    380         0
  Business integration expenses                       1,103         0
  C7.5 launch expenses                                  823         0
  SOX compliance expenses                             1,968         0
  Amortization of intangible assets                   1,116       175
                                                    -------- ---------

       Non GAAP operating income basic               $8,848    $5,027
                                                    ======== =========

Tax impact on non-GAAP adjustments                     (596)      (20)
                                                    -------- ---------

Non GAAP net income basic                            $7,505    $4,491
                                                    ======== =========

 Net income per diluted share
      Non-GAAP                                        $0.28     $0.18
                                                    ======== =========
      GAAP                                            $0.05     $0.17
                                                    ======== =========
 Shares used in computing per share amounts          26,979    25,197
                                                    ======== =========

    About Sonic Solutions

    Sonic Solutions (NASDAQ:SNIC) (http://www.sonic.com) is the leader
in digital media software, providing a broad range of interoperable,
platform independent software tools and applications for creative
professionals, business and home users, and technology partners.
Sonic's products range from advanced DVD authoring systems and
interactive content delivery technologies used to produce the majority
of Hollywood DVD film releases, to the award-winning Roxio- and
Sonic-branded CD and DVD creation, playback and backup solutions that
have become the premiere choice for consumers, prosumers and business
users worldwide.
    Sonic products are globally available from major retailers, online
at Sonic.com and Roxio.com, and are bundled with PCs, after-market
drives and consumer electronic devices. Sonic's digital media creation
engine is the de facto standard and has been licensed by major
software and hardware manufacturers, including Adobe, Microsoft,
Scientific-Atlanta, Sony, and many others. Sonic Solutions is
headquartered in Marin County, California.
    Sonic, the Sonic logo, Sonic Solutions, Easy Media Creator, and
Roxio are trademarks or registered trademarks of Sonic Solutions in
the United States and/or other countries. All other company or product
names are trademarks of their respective owners and, in some cases,
are used by Sonic under license.

    Forward-Looking Statements

    This press release and Sonic's fourth quarter and fiscal year
ended March 31, 2005 earnings conference call contain forward-looking
statements that are based upon current expectations. Such
forward-looking statements include revenue and earnings per share
guidance for the fiscal quarter ending June 30, 2005 and the fiscal
year ending March 31, 2006; the gross margin, operating margin,
effective tax rate and cost of SOX compliance assumed for the
guidance; the continuing effects of the increase in operating expenses
and headcount in connection with the Roxio acquisition; and favorable
expectations about Sonic's consumer electronics strategy and ability
to take advantage of the convergence of the PC and consumer
electronics industries. These forward-looking statements involve known
and unknown risks, uncertainties and other factors that may cause the
actual results to differ materially from any future results,
performance or achievements expressed or implied by such
forward-looking statements. Important factors that could cause such
differences include, but are not limited to, Sonic's ability to
successfully integrate Roxio's Consumer Software Division and former
employees into Sonic's business and realize the anticipated synergies
and cost savings from the acquisition; general customer and market
reaction to the Roxio acquisition; the timely introduction and
acceptance of new products, including but not limited to Sonic's high
definition series products; the costs associated with new product
introductions and the possible adverse effect on gross margin; the
transition of products to new hardware configurations and platforms;
unforeseen increases in operating expenses as a result of the Roxio
acquisition, new product introductions, cost of SOX compliance or
business expansion; loss of significant customers due to the Roxio
acquisition and other market conditions; risks related to acquisitions
and international operations; and other factors, including those
discussed in Sonic's annual and quarterly reports on file with the
Securities and Exchange Commission. This press release should be read
in conjunction with the Sonic's most recent quarterly report on Form
10-Q and Sonic's other reports on file with the Securities and
Exchange Commission, which contain a more detailed discussion of
Sonic's business including risks and uncertainties that may affect
future results. Sonic does not undertake to update any forward looking
statements.

    CONTACT: Sonic Solutions
             A. Clay Leighton, 415-893-8000 (Chief Financial Officer)
             clay_leighton@sonic.com
             or
             Market Street Partners
             Carolyn Bass, 415-445-3232
             Rob Walker, 415-445-3234
             investinsonic@sonic.com