<PAGE>

                                                                     EXHIBIT 4.5

THIS WARRANT IS NOT TRANSFERABLE. ANY SHARES ACQUIRED UPON THE EXERCISE OF THIS
WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED,
AND MAY NOT BE SOLD OR OTHERWISE TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE
REGISTRATION STATEMENT FILED UNDER SUCH ACT OR PURSUANT TO AN EXEMPTION FROM
REGISTRATION UNDER SUCH ACT.

                                 BEATNIK, INC.

                         COMMON STOCK PURCHASE WARRANT

     This certifies that, for good and valuable consideration, Beatnik, Inc., a
California corporation (the "Company"), hereby grants to Lambeau Investors LLC,
a limited liability corporation organized under the laws of California (the
"Warrantholder"), the right to subscribe for and purchase from the Company
50,000 validly issued, fully paid and nonassessable shares (the "Warrant
Shares") of the Company's Common Stock (the "Common Stock"), at the purchase
price per share of $6.00 (the "Exercise Price").  This Warrant shall be
exercisable at any time and from time to time during the period (the "Exercise
Period") commencing on the date hereof and ending on the earlier of December 1,
2002 or the consummation of an underwritten firm commitment public offering of
the Company with gross proceeds to the Company of at least $10,000,000 and a per
share price of at least $4.00, all subject to the terms, conditions and
adjustments herein set forth.

     1.   Duration and Exercise of Warrant; Limitation on Exercise; Payment of
          --------------------------------------------------------------------
Taxes.
-----

     1.1  Duration and Exercise of Warrant.
          --------------------------------

     (a)  Cash Exercise. This Warrant may be exercised by the Warrantholder by
          -------------
(i) the surrender of this Warrant to the Company, with a duly executed Exercise
Form specifying the number of Warrant Shares to be purchased, during normal
business hours on any Business Day during the Exercise Period and (ii) the
delivery of payment to the Company, for the account of the Company, by cash,
wire transfer of immediately available funds to a bank account specified by the
Company, or by certified or bank cashier's check, of the Exercise Price for the
number of Warrant Shares specified in the Exercise Form in lawful money of the
United States of America. The Company agrees that such Warrant Shares shall be
deemed to be issued to the Warrantholder as the record holder of such Warrant
Shares as of the close of business on the date on which this Warrant shall have
been surrendered and payment made for the Warrant Shares as aforesaid. A stock
certificate or certificates for the Warrant Shares specified in the Exercise
Form shall be delivered to the Warrantholder as promptly as practicable, and in
any event within 10 days, thereafter. The stock certificate or certificates so
delivered shall be in denominations of 100 shares each or such lesser or greater
denominations as may be reasonably specified by the Warrantholder in the
Exercise Form. If this Warrant shall have been exercised only in part, the
Company shall, at the time of delivery of the stock certificate or certificates,
deliver to the Warrantholder a new Warrant evidencing the rights to purchase the
remaining Warrant Shares, which new Warrant shall in all other respects be
identical with this Warrant. No adjustments shall be made on Warrant Shares
issuable on the exercise of this Warrant for any cash dividends

                                      -1-
<PAGE>

paid or payable to holders of record of Common Stock prior to the date as of
which the Warrantholder shall be deemed to be the record holder of such Warrant
Shares.

     (b)  Net Issue Exercise. In lieu of exercising this Warrant pursuant to
          ------------------
Section 1.1(a), this Warrant may be exercised by the Warrantholder by the
surrender of this Warrant to the Company, with a duly executed Exercise Form
marked to reflect net issue exercise and specifying the number of Warrant Shares
to be purchased, during normal business hours on any Business Day during the
Exercise Period. The Company agrees that such Warrant Shares shall be deemed to
be issued to the Warrantholder as the record holder of such Warrant Shares as of
the close of business on the date on which this Warrant shall have been
surrendered as aforesaid. Upon such exercise, the Warrantholder shall be
entitled to receive shares equal to the value of this Warrant (or the portion
thereof being canceled) by surrender of this Warrant to the Company together
with notice of such election in which event the Company shall issue to
Warrantholder a number of shares of the Company's Common Stock computed as of
the date of surrender of this Warrant to the Company using the following
formula:

          X = Y(A-B)
              ------
                 A

     Where X = the number of shares of Common Stock to be issued to
               Warrantholder under this Section 1.1(b);

           Y = the number of shares of Common Stock otherwise purchasable under
               this Warrant (at the date of such calculation);

           A = the fair market value of one share of the Company's Common Stock
               (at the date of such calculation);

           B = the Exercise Price (as adjusted to the date of such calculation).

     (c)  Fair Market Value.  For purposes of Section 1.1(b) fair market value
          -----------------
of one share of the Company's Common Stock shall mean:

          (i)   the closing price per share of the Company's Common Stock on the
     principal national securities exchange on which the Common Stock is listed
     or admitted to trading, or

          (ii)  if not listed or traded on any such exchange, the last reported
     sales price per share on the Nasdaq National Market or the Nasdaq Small-Cap
     Market (collectively, "Nasdaq"), or

          (iii) if not listed or traded on any such exchange or Nasdaq, the
     average of the bid and asked price per share as reported in the "pink
     sheets" published by the National Quotation Bureau, Inc. (the "pink
     sheets"), or

          (iv)  if such quotations are not available, the fair market value per
     share of the Company's Common Stock on the date such notice was received by
     the Company as reasonably determined by the Board of Directors of the
     Company.

                                                                             -2-
<PAGE>

     1.2  Payment of Taxes.  The issuance of certificates for Warrant Shares
          ----------------
shall be made without charge to the Warrantholder for any stock transfer or
other issuance tax in respect thereto; provided, however, that the Warrantholder
                                       -----------------
shall be required to pay any and all taxes which may be payable in respect of
any transfer involved in the issuance and delivery of any certificate in a name
other than that of the then Warrantholder as reflected upon the books of the
Company.

     1.3  Information.  Upon receipt of a written request from a Warrantholder,
          -----------
the Company agrees to deliver promptly to such Warrantholder a copy of its
current publicly available financial statements and to provide such other
publicly available information concerning the business and operations of the
Company as such Warrantholder may reasonably request in order to assist the
Warrantholder in evaluating the merits and risks of exercising the Warrant and
to make an informed investment decision in connection with such exercise.

     2.   Restrictions on Transfer; Restrictive Legends.
          ---------------------------------------------

     2.1  Restrictions on Transfer; Compliance with Securities Laws.  The
          ---------------------------------------------------------
Warrant Shares issued upon the exercise of the Warrant may not be transferred or
assigned in whole or in part without compliance with all applicable federal and
state securities laws by the transferor and transferee (including the delivery
of investment representation letters and legal opinions reasonably satisfactory
to the Company, if such are requested by the Company).  The Warrantholder, by
acceptance hereof, acknowledges that this Warrant and the Warrant Shares to be
issued upon exercise hereof are being acquired solely for the Warrantholder's
own account and not as a nominee for any other party, and for investment, and
that the Warrantholder will not offer, sell or otherwise dispose of any Warrant
Shares to be issued upon exercise hereof except under circumstances that will
not result in a violation of the Securities Act or any state securities laws.
Upon exercise of this Warrant, the Warrantholder shall, if requested by the
Company, confirm in writing, in a form satisfactory to the Company, that the
Warrant Shares so purchased are being acquired solely for the Warrantholder's
own account and not as a nominee for any other party, for investment, and not
with a view toward distribution or resale.

     2.2  Restrictive Legends.  This Warrant shall (and each Warrant issued in
          -------------------
substitution for this Warrant issued pursuant to Section 4 shall) be stamped or
otherwise imprinted with a legend in substantially the following form:

     "THIS WARRANT IS NOT TRANSFERABLE.  ANY SHARES ACQUIRED UPON THE EXERCISE
     OF THIS WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
     AS AMENDED, AND MAY NOT BE SOLD OR OTHERWISE TRANSFERRED EXCEPT PURSUANT TO
     AN EFFECTIVE REGISTRATION STATEMENT FILED UNDER SUCH ACT OR PURSUANT TO AN
     EXEMPTION FROM REGISTRATION UNDER SUCH ACT."

Except as otherwise permitted by this Section 2, each stock certificate for
Warrant Shares issued upon the exercise of any Warrant and each stock
certificate issued upon the direct or indirect transfer of any such Warrant
Shares shall be stamped or otherwise imprinted with a legend in substantially
the following form:

                                                                             -3-
<PAGE>

     "THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER
     THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE SOLD OR OTHERWISE
     TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT FILED
     UNDER SUCH ACT OR PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER SUCH
     ACT."

     Notwithstanding the foregoing, the Warrantholder may require the Company to
issue a stock certificate for Warrant Shares without a legend if (i) such
Warrant Shares, as the case may be, have been registered for resale under the
Securities Act or sold pursuant to Rule 144 under the Securities Act (or a
successor rule thereto) or (ii) the Warrantholder has received an opinion of
counsel reasonably satisfactory to the Company that such registration is not
required with respect to such Warrant Shares.

     3.   Reservation and Registration of Shares, Etc.
          --------------------------------------------

     The Company covenants and agrees that all Warrant Shares which are issued
upon the exercise of this Warrant will, upon issuance, be validly issued, fully
paid and nonassessable and free from all taxes, liens, security interests,
charges and other encumbrances with respect to the issue thereof, other than
taxes in respect of any transfer occurring contemporaneously with such issue.
The Company further covenants and agrees that, during the Exercise Period, the
Company will at all times have authorized and reserved, and keep available free
from preemptive rights, a sufficient number of shares of Common Stock to provide
for the exercise of the rights represented by this Warrant and will, at its
expense, upon each such reservation of shares, procure such listing of such
shares of Common Stock (subject to issuance or notice of issuance) as then may
be required on all stock exchanges on which the Common Stock is then listed or
on Nasdaq.

     4.   Representations and Covenants of Warrantholder.
          ----------------------------------------------

     This Warrant has been entered into by the Company in reliance upon the
following representations and covenants of the Warrantholder.

     4.1  Investment Purpose.  The right to acquire the Warrant Shares will be
          ------------------
acquired for investment and not with a view to the sale or distribution of any
part thereof, and the Warrantholder has no present intention of selling or
engaging in any public distribution of the same except pursuant to a
registration or exemption.

     4.2  Private Issue.  The Warrantholder understands (i) that the Warrant
          -------------
Shares issuable upon exercise of this Warrant are not registered under the 1933
Act or qualified under applicable state securities laws on the ground that the
issuance contemplated by this Warrant will be exempt from the registration and
qualifications requirements thereof, and (ii) that the Company's reliance on
such exemption is predicated on the representations set forth in this Section 4.

     4.3  Financial Risk.  The Warrantholder has such knowledge and experience
          --------------
in financial and business matters as to be capable of evaluating the merits and
risks of its investment, and has the ability to bear the economic risks of its
investment.

                                                                             -4-
<PAGE>

     4.4  Indefinite Holding Period.  The Warrantholder understands that it
          -------------------------
may be required to hold the Warrant Shares for an indefinite period.  The
Warrantholder also understands that any sale of its rights as the Warrantholder
to purchase the Warrant Shares which might be made by it in reliance upon Rule
144 under the 1933 Act may be made only in accordance with the terms and
conditions of that Rule.

     4.5  Accredited Investor.  Warrantholder is an "accredited investor"
          -------------------
within the meaning of the Securities and Exchange Rule 501 of Regulation D, as
presently in effect.

     5.   Exchange, Loss or Destruction of Warrant.
          ----------------------------------------

     Upon receipt by the Company of evidence satisfactory to it of the loss,
theft, destruction or mutilation of this Warrant and, in the case of loss, theft
or destruction, of such bond or indemnification as the Company may require, and,
in the case of such mutilation, upon surrender and cancellation of this Warrant,
the Company will execute and deliver a new Warrant of like tenor.  The term
"Warrant" as used in this Agreement shall be deemed to include any Warrants
issued in substitution or exchange for this Warrant.

     6.   Ownership of Warrant.
          --------------------

     The Company may deem and treat the person in whose name this Warrant is
registered as the holder and owner hereof (notwithstanding any notations of
ownership or writing hereon made by anyone other than the Company) for all
purposes and shall not be affected by any notice to the contrary.

     7.   Certain Adjustments.
          -------------------

     7.1  The number of Warrant Shares purchasable upon the exercise of this
Warrant and the Exercise Price shall be subject to adjustment as follows:

     (a)  Stock Dividends. If at any time prior to the exercise of this Warrant
          ---------------
in Warrantholder, full (i) the Company shall fix a record date for the issuance
of any stock dividend payable in shares of Common Stock or (ii) the number of
shares of Common Stock shall have been increased by a subdivision or split-up of
shares of Common Stock, then, on the record date fixed for the determination of
holders of Common Stock entitled to receive such dividend or immediately after
the effective date of subdivision or split-up, as the case may be, the number of
shares of Common Stock to be delivered upon exercise of this Warrant will be
increased so that the Warrantholder will be entitled to receive the number of
shares of Common Stock that such Warrantholder would have owned immediately
following such action had this Warrant been exercised immediately prior thereto,
and the Exercise Price will be adjusted as provided below in paragraph (f).

     (b)  Combination of Stock. If at any time prior to the exercise of this
          --------------------
Warrant in full the number of shares of Common Stock outstanding shall have been
decreased by a combination of the outstanding shares of Common Stock, then,
immediately after the effective date of such combination, the number of shares
of Common Stock to be delivered upon exercise of this Warrant will be decreased
so that the Warrantholder thereafter will be entitled to receive the number of
shares of Common Stock that such Warrantholder would have owned immediately

                                                                             -5-
<PAGE>

following such action had this Warrant been exercised immediately prior thereto,
and the Exercise Price will be adjusted as provided below in paragraph (f).

     (c)  Reorganization, etc.  If at any time prior to the exercise of this
          -------------------
Warrant in full any capital reorganization of the Company, or any
reclassification of the Common Stock, or any consolidation of the Company with
or merger of the Company with or into any other person or any sale, lease or
other transfer of all or substantially all of the assets of the Company to any
other person, shall be effected in such a way that the holders of Common Stock
shall be entitled to receive stock, other securities or assets (whether such
stock, other securities or assets are issued or distributed by the Company or
another person) with respect to or in exchange for Common Stock, then, upon
exercise of this Warrant the Warrantholder shall have the right to receive the
kind and amount of stock, other securities or assets receivable upon such
reorganization, reclassification, consolidation, merger or sale, lease or other
transfer by a holder of the number of shares of Common Stock that such
Warrantholder would have been entitled to receive upon exercise of this Warrant
had this Warrant been exercised immediately before such reorganization,
reclassification, consolidation, merger or sale, lease or other transfer,
subject to adjustments that shall be as nearly equivalent as may be practicable
to the adjustments provided for in this Section 7.

     (d)  Fractional Shares.  No fractional shares of Common Stock or scrip
          -----------------
shall be issued to any Warrantholder in connection with the exercise of this
Warrant. Instead of any fractional shares of Common Stock that would otherwise
be issuable to such Warrantholder, the Company will pay to such Warrantholder a
cash adjustment in respect of such fractional interest in an amount equal to
that fractional interest of the then current Fair Market Value per share of
Common Stock.

     (e)  Carryover.  Notwithstanding any other provision of this Section 7, no
          ---------
adjustment shall be made to the number of shares of Common Stock to be delivered
to the Warrantholder (or to the Exercise Price) if such adjustment represents
less than 1% of the number of shares to be so delivered, but any lesser
adjustment shall be carried forward and shall be made at the time and together
with the next subsequent adjustment which together with any adjustments so
carried forward shall amount to 1% or more of the number of shares to be so
delivered.

     (f)  Exercise Price Adjustment.  Whenever the number of Warrant Shares
          -------------------------
purchasable upon the exercise of the Warrant is adjusted, as herein provided,
the Exercise Price payable upon the exercise of this Warrant shall be adjusted
by multiplying such Exercise Price immediately prior to such adjustment by a
fraction, of which the numerator shall be the number of Warrant Shares
purchasable upon the exercise of the Warrant immediately prior to such
adjustment, and of which the denominator shall be the number of Warrant Shares
purchasable immediately thereafter.

     (g)  No Duplicate Adjustments.  Notwithstanding anything else to the
          ------------------------
contrary contained herein, in no event will an adjustment be made under the
provisions of this Section 7 to the number of Warrant Shares issuable upon
exercise of this Warrant or the Exercise Price for any event if an adjustment
having substantially the same effect to the Warrantholder as any adjustment that
otherwise would be made under the provisions of this Section 7 is made by the
Company.

                                                                             -6-
<PAGE>

     7.2  No Adjustment for Dividends.  Except as provided in Section 7.1, no
          ---------------------------
adjustment in respect of any dividends shall be made during the term of the
Warrant or upon the exercise of this Warrant.

     7.3  Notice of Adjustment.  Whenever the number of Warrant Shares or the
          --------------------
Exercise Price of such Warrant Shares is adjusted, as herein provided, the
Company shall promptly mail by first class, postage prepaid, to the
Warrantholder, notice of such adjustment or adjustments and a certificate of the
chief financial officer of the Company setting forth the number of Warrant
Shares and the Exercise Price of such Warrant Shares after such adjustment,
setting forth a brief statement of the facts requiring such adjustment and
setting forth the computation by which such adjustment was made.

     8.   Notices of Corporate Action.
          ---------------------------

     In the event of

     (a)  any taking by the Company of a record of the holders of any class of
securities for the purpose of determining the holders thereof who are entitled
to receive any dividend or other distribution, or any right to subscribe for,
purchase or otherwise acquire any shares of stock of any class or any other
securities or property, or to receive any other right, or

     (b)  any capital reorganization of the Company, any reclassification or
recapitalization of the capital stock of the Company or any Change of Control,
or

     (c)  any voluntary or involuntary dissolution, liquidation or winding-up of
the Company, the Company will mail to the Warrantholder a notice specifying (i)
the date or expected date on which any such record is to be taken for the
purpose of such dividend, distribution or right and the amount and character of
any such dividend, distribution or right, (ii) the date or expected date on
which any such reorganization, reclassification, recapitalization, Change of
Control, dissolution, liquidation or winding-up is to take place and the time,
if any such time is to be fixed, as of which the holders of record of Common
Stock (or other securities) shall be entitled to exchange their shares of Common
Stock (or other securities) for the securities or other property deliverable
upon such reorganization, reclassification, recapitalization, Change of Control,
dissolution, liquidation or winding-up and (iii) that in the event of a Change
of Control, the Warrants are exercisable immediately prior to the consummation
of such Change of Control. Such notice shall be mailed at least 20 days prior to
the date therein specified, in the case of any date referred to in the foregoing
subdivision (i), and at least 20 days prior to the date therein specified, in
the case of the date referred to in the foregoing subdivision (ii).

     9.   Definitions.
          -----------

     As used herein, unless the context otherwise requires, the following terms
have the following respective meanings:

     Business Day:  any day other than a Saturday, Sunday or a day on which
     ------------
national banks are authorized by law to close.

                                                                             -7-
<PAGE>

     Change of Control:  shall mean (i) the acquisition of the Company pursuant
     -----------------
to a consolidation of the Company with or merger of the Company with or into any
other person in which the Company is not the surviving corporation (other than a
reincorporation), (ii) the sale of all or substantially all of the assets of the
Company to any other person or (iii) any sale or transfer of any capital stock
of the Company after the date of this Agreement, following which fifty percent
(50%) or more of the Company's outstanding voting stock is transferred to
holders different than those who held the stock immediately prior to such
merger.  For purposes of this definition, "group" shall have the meaning as such
term is used in Section 13(d)(1) under the Exchange Act.

     Company:  Beatnik, Inc., a California corporation.
     -------

     Exchange Act:  the Securities Exchange Act of 1934, as amended, or any
     ------------
successor federal statute, and the rules and regulations of the SEC thereunder,
all as the same shall be in effect at the time.  Reference to a particular
section of the Securities Exchange Act of 1934, as amended, shall include a
reference to a comparable section, if any, of any successor federal statute.

     Exercise Form:  an Exercise Form in the form annexed hereto as Exhibit A.
     -------------

     Exercise Price:  the meaning specified on the cover of this Warrant, as
     --------------
such price may be adjusted pursuant to Section 6 hereof.

     Nasdaq:  the meaning specified in Section 1.1(c)(ii).
     ------

     SEC:  the Securities and Exchange Commission or any other federal agency at
     ---
the time administering the Securities Act or the Exchange Act, whichever is the
relevant statute for the particular purpose.

     Securities Act:  the Securities Act of 1933, as amended, or any successor
     --------------
federal statute, and the rules and regulations of the Commission thereunder, all
as the same shall be in effect at the time.  Reference to a particular section
of the Securities Act of 1933, as amended, shall include a reference to the
comparable section, if any, of any successor federal statute.

     Warrantholder:  the meaning specified on the cover of this Warrant.
     -------------

     Warrant Shares:  the meaning specified on the cover of this Warrant,
     --------------
subject to the provisions of Section 7.

     10.  Miscellaneous.
          -------------

     10.1 Entire Agreement.  This Warrant constitutes the entire agreement
          ----------------
between the Company and the Warrantholder with respect to this Warrant.

     10.2 Binding Effects; Benefits.  This Warrant shall inure to the benefit
          -------------------------
of and shall be binding upon the Company and the Warrantholder and their
respective successors.  Nothing in this Warrant, expressed or implied, is
intended to or shall confer on any person other than the

                                                                             -8-
<PAGE>

Company and the Warrantholder, or their respective successors, any rights,
remedies, obligations or liabilities under or by reason of this Warrant.

     10.3 Amendments and Waivers.  This Warrant may not be modified or amended
          ----------------------
except by an instrument or instruments in writing signed by the Company and the
Warrantholder.  Either the Company or the Warrantholder may, by an instrument in
writing, waive compliance by the other party with any term or provision of this
Warrant on the part of such other party hereto to be performed or complied with.
The waiver by any such party of a breach of any term or provision of this
Warrant shall not be construed as a waiver of any subsequent breach.

     10.4 Section and Other Headings.  The section and other headings
          --------------------------
contained in this Warrant are for reference purposes only and shall not be
deemed to be a part of this Warrant or to affect the meaning or interpretation
of this Warrant.

     10.5 Further Assurances.  Each of the Company and the Warrantholder shall
          ------------------
do and perform all such further acts and things and execute and deliver all such
other certificates, instruments and documents as the Company or the
Warrantholder may, at any time and from time to time, reasonably request in
connection with the performance of any of the provisions of this Agreement.

     10.6 Notices.  All notices and other communications required or permitted
          -------
to be given under this Warrant shall be in writing and shall be deemed to have
been duly given if delivered personally or sent by United States mail, postage
prepaid, to the parties hereto at the following addresses or to such other
address as any party hereto shall hereafter specify by notice to the other party
hereto:

     (a)  if to the Company, addressed to:

          Beatnik, Inc.
          217 South B Street
          San Mateo, CA 94401
          Attention: Alan Beban
          Telecopier: (650) 696-9400

     With a copy to:

          Pillsbury Madison & Sutro LLP
          2550 Hanover Street
          Palo Alto, CA 94304
          Attention: Jorge del Calvo
          Telecopier: (650) 233-4545

                                                                             -9-
<PAGE>

     (b)   if to the Warrantholder, addressed to:

           Lambeau Investors LLC
           c/o Orvick Management Group
           1887 O'Toole Avenue, Suite C208
           San Jose, California 95131
           Attn: Mr. Ken Orvick

     with copies to:

           Lambeau Investors LLC
           c/o Worthing Capital
           845 Oak Grove Avenue, Suite 105
           Menlo Park, California 94025
           Attn: Mr. Vincent Sakowski

     and

           Allen, Matkins, Leck, Gamble & Mallory LLP
           333 Bush Street, Suite 1700
           San Francisco, California 94104
           Attn: Richard C. Mallory, Esq

Except as otherwise provided herein, all such notices and communications shall
be deemed to have been received on the date of delivery thereof, if delivered
personally, or on the third Business Day after the mailing thereof.

     10.7  Counterparts.  This Warrant may be executed in any number of
           ------------
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

     10.8  Separability.  Any term or provision of this Warrant which is
           ------------
invalid or unenforceable in any jurisdiction shall, as to such jurisdiction, be
ineffective to the extent of such invalidity or unenforceability without
rendering invalid or unenforceable the terms and provisions of this Warrant or
affecting the validity or enforceability of any of the terms or provisions of
this Warrant in any other jurisdiction.

     10.9  Governing Law.  This Warrant shall be deemed to be a contract made
           -------------
under the laws of the State of California.

     10.10 No Rights or Liabilities as Stockholder.  Nothing contained in this
           ---------------------------------------
Warrant shall be deemed to confer upon the Warrantholder any rights as a
stockholder of the Company or to impose any liabilities on the Warrantholder to
purchase any securities whether such liabilities are asserted by the Company or
by creditors or stockholders of the Company or otherwise.

                                                                            -10-
<PAGE>

     IN WITNESS WHEREOF, the Company has caused this Warrant to be signed by its
duly authorized officer.

     Dated:  December 1, 1999.

LAMBEAU INVESTORS LLC                        BEATNIK, INC.

                                                /s/ Patrizia Owen
By____________________________               By_________________________________
                                                      CFO
Title_________________________               Title______________________________

                                                                            -11-
<PAGE>

                                                                       EXHIBIT A
                                                                       ---------

                                 EXERCISE FORM
                                 -------------

                (To be executed upon exercise of this Warrant)

The undersigned hereby irrevocably elects to exercise the right, represented by
this Warrant, to purchase Warrant Shares and (check one):

     [_]  herewith tenders payment for _______ of the Warrant Shares to the
          order of Beatnik, Inc. in the amount of $_________ in accordance with
          the terms of this Warrant; or

     [_]  herewith tenders this Warrant for _______ Warrant Shares pursuant to
          the Net  Issue Exercise provisions of Section 1.1(b) of this Warrant.

The undersigned requests that a certificate (or certificates) for such Warrant
Shares be registered in the name of the undersigned and that such certificate
(or certificates) be delivered to the undersigned's address below.

     In exercising this Warrant, the undersigned hereby confirms and
acknowledges that the Warrant Shares are being acquired solely for the account
of the undersigned and not as a nominee for any other party, or for investment,
and that the undersigned will not offer, sell or otherwise dispose of any such
Warrant Shares except under circumstances that will not result in a violation of
the Securities Act of 1933, as amended, or any state securities laws.

     Dated: ___________________.


                                             ___________________________________
                                                         (Signature)

                                             ___________________________________
                                                        (Print Name)

                                             ___________________________________
                                                       (Street Address)

                                             ___________________________________
                                             (City)       (State)     (Zip Code)

     If said number of shares shall not be all the shares purchasable under the
within Warrant, a new Warrant is to be issued in the name of said undersigned
for the balance remaining of the shares purchasable thereunder.

                                                                             A-1