<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-08-09</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000930803</issuerCik>
        <issuerName>HAUPPAUGE DIGITAL INC</issuerName>
        <issuerTradingSymbol>HAUP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000047040</rptOwnerCik>
            <rptOwnerName>HERMAN BERNARD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>91 CABOT COURT</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HAUPPAUGE</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>11788</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>3.02</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2004-08-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>7500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2004-08-09</value>
            </exerciseDate>
            <expirationDate>
                <value>2014-08-09</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>7500</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>37500</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <remarks>Number of derivative securities beneficially owned following reported transaction includes:

(1) Option to purchase 5,000 shares at an exercise price of $5.25 per share commencing 08/04/2000 and terminating 08/03/2010.

(2) Option to purchase 15,000 shares at an exercise price of $4.125 per share commencing 10/31/2001 and terminating 10/17/2010.  Such option is exercisable to the extent of (i) 5,000 shares on the earlier of the day immediately preceding the date of the first Annual Meeting of Stockholders of the Issuer following 10/17/2000, or 10/31/2001, provided that the Reporting Person is a Director of the Issuer on such date; (ii) 5,000 shares on the earlier of the day immediately preceding the date of the second Annual Meeting of Stockholders of the Issuer following 10/17/2000, or 10/31/2002, provided that the Reporting Person is a Director of the Issuer on such date and (iii) 5,000 shares on the earlier of the day immediately preceding the date of the third Annual Meeting of Stockholders of the Issuer following 10/17/2000, or 10/31/2003, provided that the Reporting Person is a Director of the Issuer on such date.

(3) Option to purchase 10,000 shares at an exercise price of $1.08 per share commencing 10/17/2002 and terminating 10/17/2012.

(4) Option to purchase 7,500 shares at an exercise price of $3.02 per share commencing on 08/09/2004 provided the Reporting Person is a Director of the Issuer on such date and terminating 08/09/2014.</remarks>

    <ownerSignature>
        <signatureName>Bernard Herman</signatureName>
        <signatureDate>2004-08-10</signatureDate>
    </ownerSignature>
</ownershipDocument>

