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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 StFrIjGWVI4Hdok42y7v6F2fnOkHnicD+ucr7eM88tq/uDkHojRtWW3l7CBwk6i6
 0AHOSZ6Q29pV81Nry39zew==

<SEC-DOCUMENT>0001209191-03-011160.txt : 20030708
<SEC-HEADER>0001209191-03-011160.hdr.sgml : 20030708
<ACCEPTANCE-DATETIME>20030708143754
ACCESSION NUMBER:		0001209191-03-011160
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030709
FILED AS OF DATE:		20030708

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DIGITAL THEATER SYSTEMS INC
		CENTRAL INDEX KEY:			0001226308
		STANDARD INDUSTRIAL CLASSIFICATION:	HOUSEHOLD AUDIO & VIDEO EQUIPMENT [3651]
		IRS NUMBER:				770467655
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		5171 CLARETON DRIVE
		CITY:			AGOURA HILLS
		STATE:			CA
		ZIP:			91301

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FORTH INVESTMENTS LLC
		CENTRAL INDEX KEY:			0001249887

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-50335
		FILM NUMBER:		03778375

	BUSINESS ADDRESS:	
		STREET 1:		11400 W OLYMPIC BLVD STE 550
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90064
		BUSINESS PHONE:		3104813515
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc3.xml
<DESCRIPTION>FORM 3 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0101</schemaVersion>    <documentType>3</documentType><periodOfReport>2003-07-09</periodOfReport><noSecuritiesOwned>0</noSecuritiesOwned><issuer><issuerCik>0001226308</issuerCik><issuerName>DIGITAL THEATER SYSTEMS INC</issuerName>        <issuerTradingSymbol>DTSI</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001249887</rptOwnerCik><rptOwnerName>FORTH INVESTMENTS LLC</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>  </rptOwnerStreet1><rptOwnerStreet2>  </rptOwnerStreet2><rptOwnerCity>  </rptOwnerCity><rptOwnerState>  </rptOwnerState><rptOwnerZipCode>  </rptOwnerZipCode></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>1</isTenPercentOwner><isOther>0</isOther><officerTitle></officerTitle><otherText></otherText></reportingOwnerRelationship></reportingOwner><nonDerivativeSecurity><securityTitle><value>Common Stock</value></security
Title><transactionAmounts><transactionShares><value>1177931</value></transactionShares></transactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeSecurity><derivativeSecurity><securityTitle><value>Warrant (Right to Buy Common Stock)</value></securityTitle><conversionOrExercisePrice><value>12.11</value></conversionOrExercisePrice><exerciseDate><value>1997-10-24</value></exerciseDate><expirationDate><value>2007-12-31</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>574825</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeSecurity><footnotes></footnotes><ownerSignature><signatureName>FORTH INVESTMENTS LLC, By:  For Them Inc., Manager, /s/ Michael Rutman, CFO</signatureName><signatureDate>2003-07-08</signa
tureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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