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I'm trying to help a friend to figure out if it's possible to implement DSP algorithms in Max/MSP javascript. He was told so in class, and he asked for my help but I can't find any way to process actual samples.

TL;DR Is it possible to get samples in and return them out in Max/MSP using javascript? Thanks

JohnH
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AlexanderBrevig
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4 Answers4

3

No, it's not, as it's made only for processing messages and not signal vectors. Probably you mixed JavaScript with Java — there is a mxj~ object which allows you to use Java 6 (not higher!) for developing signal processing algorithms. Check out the tutorial, which everyone starts to learn how to use Java with: http://pcm.peabody.jhu.edu/~gwright/stdmp/docs/WritingMaxExternalsInJava.pdf

EuCh
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You can write DSP algorithms using Max’s gen~ and codebox, the syntax for which resembles JavaScript or C.

DSP in Max runs at high priority to avoid audio dropouts, which the js object does not, but it is possible to generate code using JavaScript and load that into a gen~ instance. You can find an example of this bundled with Max itself: search for a file called gen~.dynamicexpr.maxpat

swithinbank
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0

They released a node.js API with Max 8. You can now.

Gal Margalit
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0

Though not using javascript, like delucis said you can now use gen~ to write dsp code.

Here's a distortion gen~ function using tanh for my own project:


    tanh_dist(input, amp, offset)
    {
        pass1 = input + offset;
        pass2 = pass1 * amp;
        pass3 = tanh(pass2);
        return(dcblock(pass3));
    }

I also made a sample patch to show you how to use it (in the codebox). Just copy the following text and paste into an empty max patch window:

----------begin_max5_patcher----------
1168.3ocyW8tbiZCD+y3mBF9TROWOHAXG2qsyzGf9Db4FOxfLVWAACH74bYx
8r2U+ALXv13j3zlOPFu+jzt6uc0tZedhky5r8zRG6ey9K1VVOOwxRIRJvx7a
KmTx9vDRoZYNgYooTtvYpFSP2KTxy1rojJdjWCjSDgaY73UEzPgVA3kAybmZ
iWH+hBbk+yyelq8WM6gWkx3ITgRSnCBypD0RcMRYQZst9a+Jx0QJ6kISjel9
F8CRZ94cBWzAmve9rf2EeX9qwE1jjAGbsstIqHknLx4FIfgvRgEHU4rZkBmv
AgnKFrl6K+piUX704m3994xCLaAIkJnEqnbx5DZadQeDhmxoZSwwYpsyZBO1
w9q2ZZJnOMgOPdCvSnkKj4.uy7zh+C3IN86fp6cgH7ovD5OsQv0ryvBttGxV
lGbdV.OHKf5yBANmxSKYwbRxqyOiIL9Ouru3gvp5TK0+J3RwzzpDAKbKgyoI
6HELBWzNXcwPt+qJjaHBHv+5HC5OhHgifM7cWp9WP82qIzNPAOry6WFZLcLw
SLVEOwH+ymc5M1rSzkyNaaTzBimYbMnTDKgtiVTxx3sTgkCIOukXqVaQxGeK
ScPOLsQDiqE41HpftiUueuFojBfZD.uTUnrTm8yqS5jGSVDsfWwTlhVHDYLl
jJFvgzxxbRndyQk4y.lu9.bZ2hbt5lybcgf4lLHYwwZJAhzwIYg+CMpsg6jk
S4LddAsDZMSDFOnANhtg.2xVsIiKJY+PYGpaoCfuwXmCBJ8DkS7Wv8zjFWHt
fEkwkFQm3gTbs5fzo.8yWZ6LpUvI4CrYHSAHlS.VBNYU4ZRgLbYtpiqAEYYI
cgZ1WBciv.myfBNcYQQV9oAKXwaOydWmAfom6rUHkqp3ZzUPlgXUIYWW1VPR
RLWW6d76IP2VhfJX5P.1sATWtaaYXQVRRG+Uira.jHHSOj9cVjXam24HQfky
xqShbZhxQrXZonqLAItrqjRwSZRuknp0laxqDzz7DvK5tfNOlt8011E15H+b
E35Vjiws8ZCLPgNeSGKcAtGNtLW+RctcA5Wt6TMjOwyOzcfrpKraJgbS3BzE
3B8KwtgTA5+MTA9BTA1Cci4B7GHWDBsojqrkF6TQ+2+anNqpKUzeNtbDrhX7
dPOWmbvtSSMdGo1i6xLZJy6RT1QJZf1cp9x.anNSAgucUDqTbGz+rRL0Flic
psdn76ej+7iba3ubfEQ1+gsZM1exf+4CfX.TuneQdBsP7.DoRtSsr6MHET3w
D76hBWK6lqv7tWB9xiEOxA+BY1VssglBJGK+3c+mc9Xti.lwEqWfVndyhO5g
5W6eoaInSFxcGNj6Oj6d3MDIL9oZdnrWI9v7PYVUQXcpioLscWKGZFJX7lWT
8kljPa7Hucds1f2HsAe85tI1.9J3AzMxFPWgMLLOXDpkXlXRcfcSYzCPcr4Y
FipmYsrsYcBSBcH8n2fZiUOKFodPuQ8DLR839F0i+HzSmzNmrhH8nenODEi5
qX22jhQiPw98XVcB5QSxJUwQSvdzzq8mb8zSsd7DqpoUGZRUYCjIuL4eArSi
FpB
-----------end_max5_patcher-----------
larme
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