EXHIBIT 99.4

MAKEMUSIC, INC.

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS

The following unaudited pro forma condensed combined financial statements have been prepared by MakeMusic, Inc. (“MakeMusic”) to reflect MakeMusic’s stock acquisition of Garritan Corporation (“Garritan”), which was effective on December 30, 2011. The transaction is more fully described in Item 2.01 of the Current Report on Form 8-K dated December 30, 2011 that MakeMusic filed with the Securities and Exchange Commission on January 5, 2012.

Based in Orcas, Washington, Garritan is a leading developer and provider of software musical instruments. This acquisition provides new products, technology, brands and resources that are complementary to MakeMusic and provides growth opportunities for the future.

Under the Stock Purchase Agreement (the “Agreement”), the aggregate purchase price totaled $1.5 million, consisting of $1.375 million in cash and a holdback of $125,000. Subject to terms in the Agreement, the holdback is payable in MakeMusic stock on the 18 month anniversary of the Closing Date, subject to reductions. For the purposes of calculating the number of shares of common stock issuable, the parties agreed to the average of the closing sale price of MakeMusic common stock for the 20 trading days immediately preceding the date of determination.

The unaudited pro forma condensed combined statements of income for the year ended December 31, 2010 and the nine month period ended September 30, 2011 are based on the historical financial statements of MakeMusic and Garritan after giving effect to the acquisition and applying the assumptions and pro forma adjustments described in the accompanying notes to the unaudited pro forma condensed combined financial statements.

The unaudited pro forma condensed combined statements of income for the year ended December 31, 2010 and for the nine month period ended September 30, 2011 combine the results of operations of MakeMusic and Garritan as if the acquisition of Garritan had occurred on January 1, 2010.

MakeMusic’s acquisition of Garritan has been accounted for in accordance with the Financial Accounting Standards Board Accounting Standards Codification 805, Business Combinations (ASC805). Pursuant to this guidance, MakeMusic used the acquisition method to account for this transaction whereby the purchase price was allocated to the fair values of the tangible and intangible assets acquired and liabilities assumed. The excess of the purchase price over the net tangible and identifiable intangible assets acquired was recorded as goodwill. FASB’s guidance provides that intangible assets with finite lives be amortized over their estimated remaining useful lives, while goodwill and other intangible assets with indefinite lives will not be amortized, but rather tested for impairment on at least an annual basis.

MakeMusic has prepared the unaudited pro forma condensed combined financial statements for illustrative purposes only and they are not intended to represent or be indicative of the combined financial position or combined results of operations that would actually have been realized had MakeMusic and Garritan been a combined company during the respective periods presented or of the results that may be achieved in future periods. In addition, these pro forma financial statements do not reflect the realization of any cost savings that may have been achieved from operating efficiencies, synergies or other activities that may result from the acquisition.

MakeMusic, Inc.

Unaudited Pro Forma Condensed Combined Statement of Income

Year Ended December 31, 2010

(in thousands, except per share amounts)

See notes to unaudited pro forma condensed combined financial statements.

Unaudited Pro Forma Condensed Combined Statement of Income

Nine Month Period Ended September 30, 2011

(in thousands, except per share amounts)

See notes to unaudited pro forma condensed combined financial statements.

MakeMusic, Inc.

NOTES TO UNAUDITED PRO FORMA CONDENSED

COMBINED FINANCIAL STATEMENTS

PRO FORMA ADJUSTMENTS

The pro forma condensed combined financial statements are based upon the historical consolidated financial statements of MakeMusic and Garritan and certain adjustments which MakeMusic believes are reasonable to give effect to the Garritan acquisition. These adjustments are based upon currently available information and certain assumptions, and therefore the actual adjustments will likely differ from the pro forma adjustments.

The pro forma adjustments included in the Unaudited Pro Forma Condensed Combined Financial Statements are as follows:

Acquired capitalized software was recorded at its estimated fair value of $226,000. Adjustments to record estimated straight line amortization expense of $45,000 and $34,000 were made for the year ended December 31, 2010 and the nine month period ended September 30, 2011, respectively:

Acquired finite-lived intangible assets were recorded at their fair value of $1,020,000. Adjustments to record estimated straight line and accelerated amortization expense of approximately $243,000 and $191,000 were made for the year ended December 31, 2010 and the nine month period ended September 30, 2011, respectively:

A reduction in capitalized software amortization for expense recorded by Garritan of approximately $241,000 and $246,000 were made for the year ended December 31, 2010 and the nine month period ended September 30, 2011, respectively:

The pro forma unaudited results do not purport to be indicative of the results which would have been obtained had the acquisition been completed as of the beginning of the earliest period presented. In addition, they do not include any benefits that may result from the acquisition due to synergies that may be derived.