Document:

Exhibit 10.19

                   AGREEMENT REGARDING SALE OF PREFERRED STOCK

         This  Agreement is entered into this 1st day of November,  2000, by and
between EdgeAudio.com, Inc. ("EdgeAudio") and Bryan Holbrook ("Holbrook").

                                    RECITALS

         1. Holbrook has contributed  capital to EdgeAudio in  contemplation  of
the purchase of 25,000 shares of Series A Preferred Stock of EdgeAudio.

         2.  EdgeAudio has prepared and Holbrook has reviewed a Preferred  Stock
Purchase Agreement related to the contemplated purchase.

         3.  Holbrook  is  willing  to  execute  the  Preferred  Stock  Purchase
Agreement subject to the modifications that are set forth below.

         Now therefore,  in  consideration  of Holbrook  executing the Preferred
Stock Purchase Agreement, the parties agree as follows:

         1. INDEMNITY.  EdgeAudio shall indemnify Holbrook to the fullest extent
permissible under the Oregon Business Corporation Act, as the same exists or may
hereafter  by  amended,  against all  expense,  liability,  and loss  (including
without limitation attorneys fees) incurred or suffered by Holbrook by reason of
or arising from the fact that  Holbrook is or was a director or  shareholder  of
the  corporation,  or is or was serving at the request of the  corporation  as a
director,  officer,  manager,  partner,  trustee,  employee, or agent of another
foreign or domestic corporation,  limited liability company, partnership,  joint
venture,   trust,   employee  benefit  plan,  or  other  enterprise,   and  such
indemnification  shall continue as to Holbrook after he ceases to be a director,
shareholder,  officer, manager,  partner, trustee,  employee, or agent and shall
inure to the benefit of Holbrook's heirs, executors, and administrators.

         2. NOTICE OF SECURITIES  REGISTRATION  FILINGS.  EdgeAudio shall notify
Holbrook in the event it files a registration  statement with the Securities and
Exchange Commission on form S-1, S-4 or S-8.

         3. CHANGE OF ADDRESS. The address for notice provided in Section 8.6 of
the Preferred Stock Purchase Agreement for EdgeAudio.com, Inc. is changed to the
following address:

                           15615 S.W. 74th, Suite 100
                              Tigard, Oregon 97224
                             Facsimile 503-598-8831

         4.  ATTORNEY'S  FEES.  Section  8.7 of  the  Preferred  Stock  Purchase
Agreement is amended to read as follows to correct several typographical errors:
"If any suit or action arising out of or related to this Agreement is brought by
any party, the prevailing party shall be entitled to recover its costs and fees,
including  reasonable  attorney's  fees,  incurred by such party in such suit or
action, including any appellate proceeding."

                                      -1-
<PAGE>

         5. PAYMENT OF DIVIDENDS. EdgeAudio agrees that without Holbrook's prior
written consent it shall pay no dividends (including dividends payable solely in
the common  stock of the  corporation)  on any common  stock of the  corporation
until  dividends in the total amount of 84 cents per share (as  adjusted) on the
Series A Stock have been paid or declared and set apart during that fiscal year,
and any prior year in which dividends accumulated but remain unpaid.

         6.  NONDILUTEABILITY.  In  accordance  with the  terms of the  business
agreement between Holbrook and EdgeAudio,  EdgeAudio agrees that in the event it
issues options or shares of stock to other parties such as employees,  EdgeAudio
shall  issue  additional  options or shares to  Holbrook  at his  discretion  to
prevent dilution of his 20 percent interest in EdgeAudio.

         7.  CORRECTION  OF   CROSS-REFERENCES   IN  AMENDMENT  TO  ARTICLES  OF
INCORPORATION.  To correct several incorrect  cross-references  in Article II of
EdgeAudio's amended and restated Articles of Incorporation the following changes
shall be made:

         A.  Section  2.3.5d(ii)(E)(1)  and (2) shall be  modified to change the
cross-references to Section  2.3.5d(iii)(C) and (D) therein to 2.3.5d(ii)(C) and
(D).

         B. The cross-reference in Section  2.3.5d(iii) to 2.3.5d(iii)(E)  shall
be changed to reference Section 2.3.5d(ii)(E).

         C. The cross-reference in Section 2.3.5k referring to Section 4.4 shall
be modified to refer to Section 2.3.

         8. CORRECTION OF SHAREHOLDER'S  AGREEMENT.  The following paragraphs of
the EdgeAudio  Shareholder's Agreement shall be amended to correct typographical
errors.

         A. The  references in the second  paragraph to "common  stock" shall be
changed to "common and preferred stock".

         B. The  reference in Section 3.4 to  "paragraph  6" shall be changed to
"paragraph 7".

         IN WITNESS WHEREOF, the undersigned have executed this Amendment on the
date first written above.

         EdgeAudio.com, Inc.

         By:/s/ Winthrop Jeanfreau                 /s/ Bryan Holbrook
            -----------------------------          -----------------------------
                                                       Bryan Holbrook

         Title:  CEO
               --------------------------

                                      -2-
<PAGE>

         TSET, Inc.

         By:
            -------------------------------------

         Title:    CFO
               ----------------------------------

                                      -3-

<PAGE>EXHIBIT 10.20

                                Amendment #002 to
                                   SUBCONTRACT
                                   #A-2116-H22
                                     BETWEEN
                   BATH IRON WORKS, A GENERAL DYNAMICS COMPANY
                                       AND
                             HIGH VOLTAGE INTEGRATED

This Amendment made this _14th__ day of __December_2000, by and between Bath
Iron Works ("BIW"), and High Voltage Integrated ("HVI") pursuant to Subcontract
#A-2116-H22 date November 8, 1999

WITNESSETH:

That in consideration of the promises and mutual obligations hereinafter set
forth, the parties hereby agree as follows:

1.      1.  TERM AND TERMINATION
        Paragraph (a), "6/1/00" shall be revised to read "12/31/01"

        All other terms and condition of the Subcontract dated November 8, 1999
        and any preceeding amendments thereto shall remain unchanged.

        IN WITNESS WHEREOF, the parties hereto have caused this Subcontract to
        be executed as of the day and year first above written.

       Bath Iron Works                                  High Voltage Integrated

       By:  Roger A. Spencer                            By: /s/ W. Alan Thomson
           -----------------------------------              -------------------

       Title:  Material Project Manager                 Title:  President

       Date:  12/15/00                                  Date:  12/19/00
             ---------------------------------                -----------------

        /s/ Roger A. Spencer                             /s/ W. Alan Thomson
       ---------------------------------------          -----------------------
       Signature                                        Signature

--------------------------------------------------------------------------------

<PAGE>

                                                       Contract No.: A-2128-H22_
                                                       ATTACHMENT A

                           BATH IRON WORKS CORPORATION

                                STATEMENT OF WORK
                                -----------------
<TABLE>
<CAPTION>

-------------------------------------------------------------------------------------------------
Task No.: 002         Date: 3/13/00                Contractor: High Voltage Integrated

Amendment No.         Date:                        BIW Tech Rep: Peter Heisey
-------------------------------------------------------------------------------------------------

---------------------------------------------------------------- --------------------------------
<S>                                                              <C>
WORK DESCRIPTION:
                                                                 Sched Start: 12/15/00

HVI shall provide ONR with research and development              Sched Complete: 2/1/01
Engineering services in support of Electronic Wind
Generation (EWG) aboard submarines.                              __X__   Total Firm Fixed Price
                                                                         $15,000
Detailed statement of work is incorporated herein
via Attachment A-1.
                                                                 Pricing shall be in accordance
                                                                 with Attachment B -

                                                                          BIW USE ONLY

                                                                 CAR/CAF:     00-74
                                                                          ---------
                                                                 Charge No.: 08825-7719-0000

---------------------------------------------------------------- --------------------------------

---------------------------------------------------------------- --------------------------------
The Contractor is hereby authorized pursuat to the above            TASK COMPLETED, BIW FINAL
referenced Contract to commence performance of the above                   ACCEPTANCE:
described work.
                                                                 -------------------------
                                                                      BIW Tech Rep.

                                                                 -------------------------
BATH IRON WORKS CORPORATION:                                          Date: --------------

By  /s/ Roger A. Spencer             Date  12/18/00              -------------------------
   ---------------------------             --------
                                                                  cc: Contract File (orig)
CONTRACTOR ACCEPTANCE:                                                Accts Payable
                                                                      Contractor Rep
By  /s/ W. Alan Thomson              Date  12/22/00                   BIW Tech Rep
   ---------------------------             --------

---------------------------------------------------------------- --------------------------------

</TABLE>

<PAGE>

Electron Wind Generator - Ventilation System Statement of Work
-------------------------------------------------------------------------------

                                STATEMENT OF WORK

CONTRACTOR:  High Voltage Integrated

INTRODUCTION

The Electron Wind Generator (EWG) creates air movement  without moving parts. It
operates by applying a high voltage  potential  between sets of electrodes  that
are  introduced  into the cross  section of the  ventilation  ductwork  as shown
conceptually  in Figure 1 below.  As air passes through the  electrodes,  a high
density of ions is created.  The High  Voltage  Power  Supply  (HVPS)  applies a
potential  between the corona  electrode  and the  accelerating  electrode  that
causes the ions to move. As the ions collide with the air molecules,  they cause
an overall  movement to the right.  This effect is known as "electron  wind" and
can be used to generate  gas flow  velocity  of about 700 feet per  minute.  The
airflow  velocity  is  completely   adjustable  from  zero  to  the  maximum  by
controlling  the electrode  voltage.  Reversing  the electrode  voltage can also
reverse flow  direction.  The  accelerating  electrode  neutralizes the gas ions
resulting in airflow with negligible ozone content.

                        [GRAPH]

     FIGURE 1. EWG CONCEPT. THE EWG COMBINES AIR MOVEMENT AND PURIFICATION.

The EWG performs two functions in addition to creating air movement.  The corona
field,  the ions, and the small amount of ozone created have been proven to kill
bacteria  and are  expected  to  oxidize  chemical  contaminants  such as carbon
monoxide, hydrogen, and hydrocarbons. In addition, it has been demonstrated that
the  EWG  precipitates  dust  particles  - a  function  currently  performed  by
electrostatic  precipitators.  Figure 1 shows a separate removable and cleanable
dust-collecting electrode that could be added to perform this function.

The EWG offers many potential ventilation system advantages including:

o    The EWG can be  designed  in many  shapes and sizes and has  extremely  low
     weight  facilitating  distribution  in ventilation  ducting  throughout the
     ship.

================================================================================
<PAGE>

o    The  adjustable  flow  velocity  and  reversibility  of the EWG can support
     increased damage control automation and fight-while-hurt capability.

o    The dust  removal  and air  purification  capability  of the EWG can reduce
     ventilation  system  components,  increase ship cleanliness,  and assist in
     damage control efforts.

o    The  virtually  silent  operation  of the EWG can reduce the ship  acoustic
     signature while eliminating most of the sound mounting  currently  required
     by the ventilation system.

Innovative  new  ventilation  system  designs  are  required to realize the full
benefits of the EWG. An electron  wind  generator  ventilation  system  (EWG-VS)
design   should  be  modular   and   adaptive   with   significantly   increased
affordability,  maintainability,  and survivability.  There is a need to examine
the full range of design  options  offered by the EWG and develop  concepts  for
innovative surface ship and submarine ventilation systems. These concept designs
will allow  quantifying  the  benefits  of EWG-VS as  compared  to  conventional
designs to support ONR ventilation system development. The design work will also
identify  critical  technical  issues  for EWG  deployment  and any  development
efforts required.

REQUIRED EFFORT

The  contractor  shall work as part of a design  team  developing  concepts  for
innovative surface ship and submarine ventilation systems that take advantage of
the  EWG's  light  weight,   controllability,   configuration  flexibility,  and
purification  capability.  The contractor  shall provide  measured and projected
performance  data for the EWG as required by the team. The contractor shall also
provide  ideas  on  highly  modular  and  adaptive  systems  with  significantly
increased  affordability,  maintainability,  and survivability for evaluation by
the team.

SCHEDULE AND MILESTONES

Figure 2 shows the schedule for this effort.  The  ventilation  system  concepts
shall be  presented  at a  tailored  SDR prior to the  preparation  of the final
report.

                                    [GRAPH]

                       FIGURE 2. EWG-VS PHASE 1 SCHEDULE.

================================================================================

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