JOINT FILING AGREEMENT

Exhibit 99.1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(f) under the Securities Exchange Act of 1934, the undersigned hereby (i) agree to the joint filing with all other Reporting Persons (as such term is defined in the statement on Schedule 13D described below) on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the Class A Common Stock of DynaVox Inc. and (ii) agree that this Agreement be included as an Exhibit to such joint filing.   This Agreement may be executed in any number of counterparts all of which taken together shall constitute one and the same instrument.

 Dated:  March 1, 2011

	VESTAR CAPITAL PARTNERS IV, L.P.
	By:	Vestar Associates IV, L.P.,
		its General Partner
	By:	Vestar Associates Corporation IV,
		its General Partner
	By:		/s/ Xxxxxx Xxxxx Xxxxx
	Name:		Xxxxxx Xxxxx Xxxxx
	Title:		Authorized Signatory
	VCD INVESTORS LLC
	By:	Vestar Executives IV, L.P.,
		its General Partner
	By:	Vestar Associates IV, L.P.
		its General Partner
	By:	Vestar Associates Corporation IV,
		its General Partner
	By:		/s/ Xxxxxx Xxxxx Xxxxx
	Name:		Xxxxxx Xxxxx Xxxxx
	Title:		Authorized Signatory
	VESTAR ASSOCIATES IV, L.P.
	By:	Vestar Associates Corporation IV,
		its General Partner
	By:		/s/ Xxxxxx Xxxxx Xxxxx
	Name:		Xxxxxx Xxxxx Xxxxx
	Title:		Authorized Signatory
	VESTAR EXECUTIVES IV, L.P.
	By:	Vestar Associates Corporation IV,
		its General Partner
	By:		/s/ Xxxxxx Xxxxx Xxxxx
	Name:		Xxxxxx Xxxxx Xxxxx
	Title:		Authorized Signatory
	VESTAR ASSOCIATES CORPORATION IV
	By:		/s/ Xxxxxx Xxxxx Xxxxx
	Name:		Xxxxxx Xxxxx Xxxxx
	Title:		Authorized Signatory