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                                                                    EXHIBIT 4.11

                                CONTRIBUTION NOTE

AMOUNT                                                                 DATE

         For value received, Ampex Corporation, a Delaware corporation (the
"Obligor"), promises to pay to the order of Hillside Capital Incorporated a
Delaware corporation (the "Holder"), the amount of $________ (the "Principal
Amount"), together with interest computed at the rate provided for in the
Agreement, dated December 1, 1994 but effective as of November 22, 1994 (as the
same may be amended from time to time, the "Agreement"), among the Ampex Group,
the Limited Hillside Group and the Sherborne (each as defined therein).
Principal and the interest payments shall be made in accordance with the
provisions of Article II of the Agreement. All such payments of principal and
interest shall be made in lawful money of the United States in Federal or other
immediately available funds at the office of Holder, 405 Park Avenue, New York,
New York 10022.

         Interest shall be paid quarterly, in arrears, commencing on December15,
2001, and $________ of the Principal amount shall be due and payable on the
first anniversary of the date hereof, and the balance of the Principal Amount
shall be due and payable on the fourth anniversary of the date hereof.

         This Note may not be transferred to any person who is not a member of
the Hillside Group or the Sherborne Group.

         This Note is one of the Notes referred to in the Agreement. Terms
defined in the Agreement are used herein with the same meanings. Reference is
made to the Agreement for provisions for the repayment hereof and the
acceleration of the maturity hereof and other provisions governing this Note.

                                                 AMPEX CORPORATION

                                                 By:
                                                    ----------------------------
                                                    Craig L. McKibben
                                                    Vice President<PAGE>

                                                                EXHIBIT 10.23
                               September 25, 2001

David Lockwood
2798 Broadway
San Francisco, CA 94115

            Re: September 12, 2001 Option Grant for 1,500,000 Shares
                ----------------------------------------------------

Dear David:

            On September 12, 2001, the Board of Directors of InterTrust
Technologies Corporation (the "Company") granted you options to purchase up to
1,500,000 shares of the Company's common stock, with the strike price being the
closing price on your first day of employment (Sept. 25th) (the "Option"). Under
the terms of the Stock Option Agreement (the "Option Agreement") to be entered
into in connection with the grant of the Option, the shares granted (the "Option
Shares") are subject to certain vesting conditions. We are pleased to inform you
that the Board of Directors has approved the acceleration of vesting of the
Option Shares following certain changes in the control of the Company, and your
employment is thereafter terminated by the Company without Cause or is
terminated by you for Good Reason (as each such term is defined below).

            Should there occur a Corporate Transaction (as defined below), and
your employment is thereafter terminated by the Company without Cause or is
terminated by you for Good Reason, then you shall immediately vest in 50% of the
Option Shares which are unvested at that time. In addition, should there occur a
Corporate Transaction in which the aggregate consideration received by each
share of Company common stock is equal to or greater than $5.00 in either equity
or cash, and your employment is thereafter terminated by the Company without
Cause or is terminated by you for Good Reason, then you shall immediately vest
in 100% of the Option Shares which are unvested at that time. The term
"Corporate Transaction" shall mean: (a) the consummation of a merger or
consolidation of the Company with or into another entity or any other corporate
reorganization, if persons who immediately prior to such merger, consolidation
or other reorganization did not own 50% or more of the voting power of the
Company own immediately after such merger, consolidation or other reorganization
50% or more of the voting power of the outstanding securities of each of (i) the
continuing or surviving entity and (ii) any direct or indirect parent
corporation of such continuing or surviving entity; (b) the sale, transfer or
other disposition of all or substantially all of the Company's assets; or (c)
any transaction as a result of which any person is the "beneficial owner" (as
defined in Rule 13d-3 under the Securities Exchange Act of 1934, as amended),
directly or indirectly, of securities of the Company representing at least 50%
of the total voting power represented by the Company's then

<PAGE>

David Lockwood
September 25, 2001
Page 2

outstanding voting securities. For purposes of paragraph (c), the term "person"
shall have the same meaning as when used in sections 13(d) and 14(d) of the
Exchange Act but shall exclude (i) a trustee or other fiduciary holding
securities under an employee benefit plan of the Company or of a parent or
subsidiary and (ii) a corporation owned directly or indirectly by the
stockholders of the Company in substantially the same proportions as their
ownership of the common stock of the Company. A transaction shall not constitute
a Corporate Transaction if its sole purpose is to change the state of the
Company's incorporation or to create a holding company that will be owned in
substantially the same proportions by the persons who held the Company's
securities immediately before such transaction. The term "Cause" shall mean your
conviction of, or plea of nolo contendre to, any felony or to any other crime
involving the Company's business or assets. The term "Good Reason" shall mean
(i) the assignment to you of duties and responsibilities that, in your
reasonable judgment, are inconsistent with those that you principally performed
prior to the Change of Control, (ii) the requirement that you report to any
person other than the Chief Executive Officer or President of the Company (or if
the Corporate Transaction results in the direct or indirect acquisition of the
Company, the Chief Executive Officer of the ultimate parent of the acquiring
company) (iii) the change of your place of employment from the San Francisco
Metropolitan area (subject only to reasonable travel requirements), or (iv) the
failure of the Company (or the ultimate acquiring company) to provide you with
compensation and benefits (including salary, health benefits and stock option
awards) at least as favorable as those provided to you by the Company at any
time prior to the Change of Control.

         This Letter Agreement shall be binding upon the Company, its successors
and assigns (including, without limitation, the surviving entity or successor
party resulting from the change in control) and shall be construed and
interpreted under the laws of the State of California. This Agreement supersedes
all prior agreements between you and the Company relating to the acceleration of
the Option Shares.

            Please indicate your acceptance of the foregoing by signing the
enclosed copy of this letter and returning it to the Company.

                                            Very truly yours,

                                            INTERTRUST TECHNOLOGIES CORPORATION

                                            By:     /s/ Victor Shear
                                               ---------------------------------

Accepted and agreed to:

/s/ David Lockwood
-----------------------------
David Lockwood

Date:  9/25/01
     ------------------------<PAGE>

                                                                    EXHIBIT 10.2

                             [LETTERHEAD OF ROXIO]

September 24, 2001

Wm. Christopher Gorog
4211 Toluca Road
Toluca Lake, California 91602

Dear Chris:

On behalf of the Compensation Committee of Roxio, Inc. (the "Company" or
"Roxio"), I am pleased to confirm the new terms of your employment agreement in
the position of President and Chief Executive Officer of the Company.

Your base salary will be increased to $490,000 per annum commencing September
24, 2001. Your salary will be reviewed annually by the Compensation Committee.

You will be eligible to participate in Roxio's annual bonus program and will be
eligible for annual stock option grants. The amount of your bonus and stock
option grant for any particular year will be determined by the Compensation
Committee and will be dependent on your performance and that of the Company.

Roxio provides a range of company-paid benefits for which you are eligible. You
will also receive an automobile allowance of $1,000 per month, an annual
Company-paid physical examination, and a health club subsidy and financial
planning assistance (the health club subsidy and financial planning assistance
are not to exceed $4,500 per year in the aggregate on a gross basis).

Your reasonable travel and other expenses incurred in the performance of your
duties for the Company will be paid for or reimbursed by the Company. When
traveling by air, you will exercise your judgment regarding when economy or
business class (or, in rare occasions, first class) air travel is justified. The
Company will pay or reimburse you for your membership dues in professional
organizations (including, without limitation, the Young Presidents Organization
or any successor organization).

You have previously been granted an option to purchase up to 500,000 shares of
Roxio common stock in accordance with the Roxio Amended and Restated 2000 Stock
Option Plan. The Compensation Committee has awarded you, if you sign and return
this letter agreement, a stock option to purchase up to an additional 375,000
shares of Roxio common stock. Such options will be granted under the Roxio
Amended and Restated 2000 Stock Option Plan, and will have an exercise price per
share equal to the fair market value as determined by the Board of Directors on
the date of grant. Such option will have a maximum term of ten years, will be
immediately vested as to 25% of the subject shares, will vest as to 6.25% of the
subject shares on January 1, 2002 and on each three-month

                                       1

<PAGE>

Wm. Christopher Gorog
September 24, 2001
Page 2 of 3

anniversary of such date until the option is fully vested, and will otherwise be
subject to earlier termination and the other terms set forth in such plan and
the written stock option agreement to evidence such option (such agreement to be
in the form customarily used by Roxio for employee stock option grants under
such plan).

If a Change of Control (as defined in Roxio's Amended and Restated 2000 Stock
Option Plan) occurs, all stock options that are granted to you by Roxio
(including options granted to you after the date of this agreement) and that are
outstanding immediately before the Change of Control will thereupon become fully
vested. This accelerated vesting provision will apply notwithstanding the fact
that accelerated vesting may not be required in the circumstances under the
applicable Roxio stock option plan.

The initial term of this agreement is three years. On each date that is one year
before the then-scheduled expiration date of this agreement, the term of this
agreement will automatically be extended for one additional year unless either
party has previously notified the other in writing that the term of this
agreement will not be so extended or further extended, as the case may be;
provided that the maximum term of this agreement (including any extensions) will
not exceed seven years.

Roxio may terminate your employment and this agreement at any time. You may
terminate your employment and this agreement at any time. If Roxio terminates
your employment and this agreement for Cause (as defined below), or if you quit,
before a Change of Control, you will not be entitled to severance benefits. If
Roxio terminates your employment and this agreement without Cause before a
Change of Control, you will be entitled to the severance benefits described
below. If Roxio terminates your employment and this agreement, or if you quit,
upon or following a Change of Control (whether or not for Cause), you will be
entitled to the severance benefits described below. In no event will you be
entitled to severance benefits if your employment terminates or is terminated
due to your death or total disability, or upon or following the expiration of
the term of this agreement. The severance benefits referred to above will be
composed of the following: (a) all of your Roxio stock options outstanding
immediately prior to the termination of your employment will vest, (b) Roxio
will promptly pay you in cash a lump sum severance payment equal to 165% of your
annualized base salary, and (c) you will be entitled to continued coverage in
the Company's welfare benefit plans for the twelve-month period following your
termination (or the Company will provide you with similar coverage). For this
purpose, "Cause" means that you have been grossly negligent in the performance
of your duties for Roxio, or you have engaged in willful misconduct, or you have
been convicted of a felony or any crime involving moral turpitude. Nothing in
this paragraph is intended to supercede the earlier paragraph in this agreement
that provides for the automatic acceleration of your options upon a Change of
Control.

                                       2

<PAGE>

Wm. Christopher Gorog
September 24, 2001
Page 3 of 3

Any disputes regarding this agreement or your employment by Roxio will be
resolved through binding arbitration with a single neutral arbitrator under the
rules of the American Arbitration Association.

Please sign this letter, indicating acceptance of this offer, and return to me.

Sincerely,

/s/ Richard Loupee for
----------------------
Rob Rodin
Chairman, Compensation Committee

                                 Accepted:  /s/ Wm. Christopher Gorog
                                           -------------------------------
                                             Wm. Christopher Gorog

                                       3

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