Document:

EXHIBIT 10.1

     AMENDMENT NO. 1, dated as of March 16, 2007, among MUZAK LLC a Delaware
limited liability company (the "Borrower"), MUZAK HOLDINGS LLC a Delaware
limited liability company ("Holdings"), BEAR STEARNS CORPORATE LENDING INC., as
Administrative Agent (the "Administrative Agent") and the Lenders listed on the
signature pages hereto, to that certain Credit Agreement, dated as of April, 15,
2005 (as amended, supplemented, amended and restated or otherwise modified from
time to time, the "Credit Agreement") among the Borrower, Holdings, the lenders
from time to time party thereto (the "Lenders"), BEAR STEARNS & CO INC. as sole
lead arranger and sole bookrunner, and the Administrative Agent. Capitalized
terms used and not otherwise defined herein shall have the meanings assigned to
them in the Credit Agreement.

     WHEREAS, Borrower has requested that the Lenders agree to amend certain
provisions of the Credit Agreement as set forth herein, and the Lenders party
hereto are willing to so amend such provisions of the Credit Agreement pursuant
to the terms and subject to the conditions set forth herein;

     NOW, THEREFORE, in consideration of the premises and covenants contained
herein and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto, intending to
be legally bound hereby, agree as follows:

     Section 1.        Amendments.
                       -----------

     (a) The following defined terms shall be added to Section 1.1 of the Credit
Agreement in alphabetical order:

     "Amendment No. 1": Amendment No. 1 to this Agreement dated as of March 16,
2007.

     "Amendment No. 1 Effective Date": March 16, 2007, the date on which all
conditions precedent set forth in Section 3 of Amendment No. 1 were satisfied.

     "Repricing Transaction": the refinancing or repricing by the Borrower of
the Term Loans under this Agreement (x) with the proceeds of any senior secured
bank loan or other debt financing (including, without limitation, any new or
additional term loans under this Agreement) or (y) in connection with any
amendment to this Agreement, in either case, resulting in an interest rate
margin or weighted average yield (to be determined by the Administrative Agent
consistent with generally accepted financial practice, after giving effect to,
among other factors, margins, upfront or similar fees or original issue discount
shared with all lenders or holders thereof, but excluding the effect of any
arrangement, structuring, syndication or other fees payable in connection
therewith that are not shared with all lenders or holders thereof) on such
financing or the Term Loans as so repriced that is less than the Applicable Rate
for, or weighted average yield (to be determined by the Administrative Agent on
the same basis) of, the Term Loans immediately prior to such refinancing or
repricing; provided that the term "Repricing Transaction" shall not include any
refinancing of all (and not less than all) of the Term Loans in connection with
a transaction constituting a Change of Control.

                                       1
<PAGE>

     (b) The definition of "Applicable Margin" in Section 1.1 of the Credit
Agreement is hereby amended by deleting the definition in its entirety and
replacing it with the following:

         "for Eurodollar Loans, 3.75% and, for Base Rate Loans, 2.75%."

     (c) The definition of "Term Loan Termination Date" in Section 1.1 of the
Credit Agreement is hereby amended by deleting the definition in its entirety
and replacing it with the following:

     "January 19, 2009."

     (d) Section 3.3 of the Credit Agreement is hereby amended by adding "(a)"
at the beginning of such Section, immediately prior to the words "Each
prepayment" and by adding the following paragraph (b) to such Section
immediately after the end of such Section 3.3(a):

          "(b) If, prior to the first anniversary of the Amendment No. 1
          Effective Date, (i) the Borrower makes any prepayment of Term Loans in
          connection with any Repricing Transaction, or (ii) effects any
          transaction that has the effect of a Repricing Transaction, the
          Borrower shall pay to the Administrative Agent, for the ratable
          account of each Term Lender, (A) in the case of clause (i), a
          prepayment premium of 1% of the amount of such Term Loans being
          prepaid and (B) in the case of clause (ii), a payment equal to 1% of
          the aggregate amount of Term Loans outstanding immediately prior to
          such amendment. In addition, to the extent any amount is payable to
          any Term Lender pursuant to this Section 3.3(b), any Term Lender that
          is replaced pursuant to Section 3.14, shall be paid, without
          duplication, a premium of 1% of the amount of such Term Lender's Term
          Loans that are assigned to one or more Eligible Assignees."

     (e) Section 7.5 of the Credit Agreement is hereby amended by deleting the
"and" at the end of clause (g), deleting the "." at the end of clause (h) and
replacing it with "; and", and by further inserting a new paragraph (i) as
follows:

         "Dispositions of assets in connection with one or more asset swaps or
exchanges, which assets have a fair market value not exceeding $10,000,000 in
the aggregate from the Amendment No. 1 Effective Date; provided that (i) the
aggregate revenues (in each case calculated based on the most recent twelve
month period for which financial statements are available immediately prior to
such Disposition) attributable to all such assets being disposed of do not
exceed $10,000,000 in the aggregate from the Amendment No. 1 Effective Date,
(ii) the Borrower shall deliver a certificate to the Administrative Agent
stating that any proposed asset swap is for fair market value and (iii) each
asset swap or exchange shall require the Administrative Agent's prior written
consent."

                                       2
<PAGE>

     Section 2. Representations and Warranties. Each of Holdings and the
Borrower represents and warrants to the Lenders as of the date hereof and the
Amendment No. 1 Effective Date that:

     (a) The execution, delivery and performance by the Borrower and each Parent
Guarantor of this Amendment No. 1 has been duly authorized by all necessary
corporate or other organizational action, and does not and will not (a)
contravene the terms of any of such Person's Organization Documents; (b)
conflict with or result in any breach or contravention of, or the creation of
any Lien under, or require any payment to be made under (i) any Contractual
Obligation to which such Person is a party or affecting such Person or the
properties of such Person or any of its Restricted Subsidiaries or (ii) any
order, injunction, writ or decree of any Governmental Authority or any arbitral
award to which such Person or its property is subject; or (c) violate any Law,
except, in each case referred to in clauses (b) and (c), to the extent that
conflict, breach, contravention, creation, payment or violation could not
reasonably be expected to have a Material Adverse Effect.

     (b) Before and after giving effect to this Amendment No. 1, the
representations and warranties set forth in the Credit Agreement are true and
correct in all material respects on and as of the date of such Credit Extension,
except to the extent that such representations and warranties specifically refer
to an earlier date, in which case they shall be true and correct in all material
respects as of such earlier date.

     (c) At the time of and after giving effect to this Amendment No. 1, no
Default or Event of Default has occurred and is continuing.

     Section 3.        Conditions to Effectiveness.  This Amendment No. 1 shall
become effective on the date on which each of the following conditions is
satisfied:

     (a) The Administrative Agent (or its counsel) shall have received from (i)
Lenders constituting each Term Lender and (ii) each of the other parties hereto,
a counterpart of this Amendment No. 1 signed on behalf of such party;

     (b) All corporate and other proceedings taken or to be taken in connection
with this Amendment No. 1 and all documents incidental thereto, whether or not
referred to herein, shall be reasonably satisfactory in form and substance to
the Administrative Agent;

     (c) The representations and warranties in Section 2 of this Amendment No. 1
shall be true and correct; and

     (d) the Borrower shall have reimbursed the Administrative Agent for its
reasonable out-of-pocket expenses incurred by it in connection with this
Amendment No. 1, including the reasonable fees, charges and disbursements of
Cahill Gordon & Reindel LLP, counsel for the Administrative Agent, and any other
amounts due and payable on the effective date of this Amendment No. 1 pursuant
to Section 10.5 of the Credit Agreement.

     Section 4.        Counterparts. This Amendment No. 1 may be executed in any
number of counterparts and by different parties hereto on separate counterparts,

                                       3
<PAGE>

each of which when so executed and delivered shall be deemed to be an original,
but all of which when taken together shall constitute a single instrument.
Delivery of an executed counterpart of a signature page of this Amendment No. 1
by facsimile transmission shall be effective as delivery of a manually executed
counterpart hereof.

     Section 5.        Applicable Law. THIS AMENDMENT NO. 1 AND THE RIGHTS AND
OBLIGATIONS OF THE PARTIES UNDER THIS AMENDMENT NO. 1 SHALL BE GOVERNED BY, AND
CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK,
WITHOUT GIVING EFFECT TO CONFLICT OF LAWS PRINCIPLES THEREOF.

     Section 6.        Headings.  The headings of this Amendment No. 1 are for
purposes of reference only and shall not limit or otherwise affect the meaning
hereof.

     Section 7.        Effect of Amendment. Except as expressly set forth
herein, this Amendment No. 1 shall not by implication or otherwise limit,
impair, constitute a waiver of or otherwise affect the rights and remedies of
the Lenders or the Agents under the Credit Agreement or any other Loan Document,
and shall not alter, modify, amend or in any way affect any of the terms or
conditions contained in the Credit Agreement or any other Loan Document, all of
which are ratified and affirmed in all respects and shall continue in full force
and effect. The Required Lenders agree that the Borrower and the Administrative
Agent may enter into an Amended and Restated Credit Agreement after the
Amendment No. 1 Effective Date in form and substance satisfactory to the
Administrative Agent to give effect to this Amendment No. 1. By executing and
delivering a copy hereof, each Loan Party hereby agrees and confirms that all
Loans and Obligations shall be fully guaranteed and secured pursuant to the Loan
Documents.

            [THE REMAINDER OF THIS PAGE IS INTENTIONALLY LEFT BLANK.]

                                       4
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Amendment No. 1 to
be duly executed as of the date first above written.

                                  MUZAK LLC

                                  By:    /s/ R. Dodd Haynes
                                         ---------------------------------------
                                         Name:  R. Dodd Haynes
                                         Title: CFO

                                  MUZAK HOLDINGS LLC

                                  By:    /s/ R. Dodd Haynes
                                         ---------------------------------------
                                         Name:  R. Dodd Haynes
                                         Title: CFO

<PAGE>

                                  BEAR, STEARNS CORPORATE LENDING INC.,
                                    as Administrative Agent, Collateral
                                    Agent and a Lender

                                  By:    /s/ Victor Bulzacchelli
                                         ---------------------------------------
                                         Name:  Victor Bulzacchelli
                                         Title: Vice President

<PAGE>

                                                            , as a Lender
                                  --------------------------

                                  By:
                                         ---------------------------------------
                                         Name:
                                         Title:

                                  By:
                                         ---------------------------------------
                                         Name:
                                         Title:

<PAGE>

                                  ALJ Capital I, L.P.       , as a Lender
                                  --------------------------

                                  By:    /s/ Lawrence B. Gill
                                         ---------------------------------------
                                         Name:   Lawrence B. Gill
                                         Title:  Manager, ALJ Capital Manage-
                                                   ment, LLC, its agent

                                  By:
                                         ---------------------------------------
                                         Name:
                                         Title:

                                  ALJ Capital II, L.P.      , as a Lender
                                  --------------------------

                                  By:    /s/ Lawrence B. Gill
                                         ---------------------------------------
                                         Name:   Lawrence B. Gill
                                         Title:  Manager, ALJ Capital Manage-
                                                   ment, LLC, its agent

                                  By:
                                         ---------------------------------------
                                         Name:
                                         Title:

                                  BEAR STEARNS INVESTMENT PRODUCTS, INC.,
                                    as a Lender

                                  By:    /s/ Jonathan Weiss
                                         ---------------------------------------
                                         Name:   Jonathan Weiss
                                         Title:  Authorized Signatory

                                  By:
                                         ---------------------------------------
                                         Name:
                                         Title:

                                  Black Diamond Offshore, Ltd., as a Lender
                                  ----------------------------
                                  By:    Carlson Capital, L.P. its Investment
                                         Advisor

                                  By:    /s/ Christopher W. Haga
                                         ---------------------------------------
                                         Name:   Christopher W. Haga
                                         Title:  Portfolio Manager

<PAGE>

                                  Caspian Capital Partners, L.P.

                                  By:    Mariner Investment Group, as
                                         Investment Advisor

                                  as a Lender

                                  By:    /s/ Adam S. Cohen
                                         ---------------------------------------
                                         Name:   Adam S. Cohen
                                         Title:  Principal, Mariner
                                                    Investment Group, as
                                                    Investment Advisor.

                                  By:
                                         ---------------------------------------
                                         Name:
                                         Title:

                                  Double Black Diamond Offshore LDC, as a Lender
                                  ---------------------------------
                                  By:    Carlson Capital, L.P., its Investment
                                         Advisor

                                  By:    /s/ Christopher W. Haga
                                         ---------------------------------------
                                         Name:   Christopher W. Haga
                                         Title:  Portfolio Manager

                                  Fidelity Central Investment Portfolios LLC:
                                     Fidelity Floating Rate Central Investment
                                     Portfolio, as a Lender

                                  By:    /s/ John H. Costello
                                         ---------------------------------------
                                         Name:   John H. Costello
                                         Title:  Assistant Treasurer

                                  By:
                                         ---------------------------------------
                                         Name:
                                         Title:

<PAGE>

                                  Field Point I, as a Lender

                                  By:    /s/ Richard Petrilli
                                         ---------------------------------------
                                         Name:   Richard Petrilli
                                         Title:  Authorized Signatory

                                  By:
                                         ---------------------------------------
                                         Name:
                                         Title:

                                  Field Point II, as a Lender

                                  By:    /s/ Richard Petrilli
                                         ---------------------------------------
                                         Name:   Richard Petrilli
                                         Title:  Authorized Signatory

                                  By:
                                         ---------------------------------------
                                         Name:
                                         Title:

                                  Field Point III, as a Lender

                                  By:    /s/ Richard Petrilli
                                         ---------------------------------------
                                         Name:   Richard Petrilli
                                         Title:  Authorized Signatory

                                  By:
                                         ---------------------------------------
                                         Name:
                                         Title:

                                  Field Point IV, as a Lender

                                  By:    /s/ Richard Petrilli
                                         ---------------------------------------
                                         Name:   Richard Petrilli
                                         Title:  Authorized Signatory

                                  By:
                                         ---------------------------------------
                                         Name:
                                         Title:

<PAGE>

                                  GENERAL ELECTRIC CAPITAL
                                  CORPORATION, as a Lender

                                  By:    /s/ KARL KIEFFER
                                         ---------------------------------------
                                         Name:   KARL KIEFFER
                                         Title:  DULY AUTHORIZED SIGNATORY

                                  ORIX FINANCE CORP, as a Lender
                                  -----------------

                                  By:    /s/ Christopher L. Smith
                                         ---------------------------------------
                                         Name:   Christopher L. Smith
                                         Title:  Authorized Representative

                                  By:    N/A
                                         ---------------------------------------
                                         Name:
                                         Title:

                                  Quadrangle Master Funding Ltd., as a Lender

                                  By:    /s/ Christopher Santana
                                         ---------------------------------------
                                         Name:   Christopher Santana
                                         Title:  Managing Principal

                                  By:    N/A
                                         ---------------------------------------
                                         Name:
                                         Title:

                                  Restoration Holdings Ltd., as a Lender
                                  ------------------------

                                  By:    /s/ Pamela M. Lawrence
                                         ---------------------------------------
                                         Name:   Pamela M. Lawrence
                                         Title:  Director

                                  By:
                                         ---------------------------------------
                                         Name:
                                         Title:

<PAGE>

                                  Riva Ridge Master Fund, Ltd., as a Lender

                                  By:    Riva Ridge Capital Management LP,
                                  As Investment Manager

                                  By:    Riva Ridge GP LLC, GP to the Investment
                                  Manager

                                  By:    /s/ STEPHEN GOLDEN
                                         ---------------------------------------
                                         Name:   STEPHEN GOLDEN
                                         Title:  MANAGING MEMBER

                                  THERMOPYLAE FUNDING CORP, as a Lender

                                  By:    /s/ John O'Dowd
                                         ---------------------------------------
                                         Name:   John O'Dowd
                                         Title:  Authorized SignatoryExhibit 10.26

                               FIRST AMENDMENT TO
                          INVENTORY PURCHASE AGREEMENT

This First Amendment to the Inventory Purchase Agreement (the "First Amendment")
is entered into as of March 14, 2007, by and between Intraop Medical
Corporation, a Nevada Corporation ("Company") and 4M, Inc., a California
Corporation ("Buyer").

                                    RECITALS
                                    --------

         WHEREAS, on October 3, 2006, the undersigned entered into that certain
Inventory Purchase Agreement by and between the Company and Buyer (the
"Agreement"), which provides for a $700,000 inventory purchase line of credit,
and;

         WHEREAS, the Company and Buyer wish to amend the Agreement to increase
the amount of credit available under the line to $750,000;

                                    AGREEMENT
                                    ---------

     NOW, THEREFORE, for good and valuable consideration, and intending to be
legally bound, the parties hereby agree as follows:

Amendment

1. Section 2.1 of the Restated Agreement is amended in its entirety to read as
follows:

     "2.1. Buyer will purchase up to $750,000 of Inventory from Company, on a
revolving basis, upon the terms and conditions set forth herein:"

General

2.1 On and after the effective date of this First Amendment, each reference in
the Agreement to "the Agreement," "this Agreement," "hereunder" and "hereof" or
words of like import shall refer to the Restated Agreement as amended by this
First Amendment. The Restated Agreement, as amended by this First Amendment, is
and shall continue to be in full force and effect and is hereby in all respects
ratified and confirmed.

2.2 This First Amendment shall be governed by and construed in accordance with
the substantive laws of the United States and the State of California, without
regard to or application of California's conflicts of law rules. Any litigation
arising out of or relating to this First Amendment shall take place exclusively
in the appropriate state or federal court having jurisdiction in Santa Clara
County, California, and each party hereby irrevocably consents to the
jurisdiction of such courts.

<PAGE>

2.3 The Restated Agreement, as amended by this First Amendment, represents the
entire agreement between the parties hereto concerning the subject matter hereof
and supersedes any and all prior or contemporaneous correspondence, quotations
and negotiations. The Restated Agreement, as amended by this First Amendment,
supersedes and will take precedence over any conflicting terms in any purchase
order invoice, confirmation or other similar document.

2.4 This First Amendment may be executed in two or more counterparts, each of
which shall be deemed an original, but all of which together shall constitute
one and the same instrument. This First Amendment may be executed and delivered
by telecopy or facsimile and execution in such manner shall constitute an
original.

IN WITNESS WHEREOF, the parties hereto, intending to be legally bound, have
executed this Amendment as of the date first written above.

                                           COMPANY:
                                           --------

                                           Intraop Medical Corporation

                                           By: /s/ Howard Solovei
                                               ------------------
                                               Howard Solovei
                                               Chief Financial Officer

                                           BUYER:
                                           ------

                                           4M, Inc.

                                           By: /s/ Hans Morkner
                                               ----------------
                                               Hans Morkner

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