I have a simple question about MaxMsp.

keldhansen123 · Joined: Nov 26, 2004 Posts: 8 Location: Denmark

Hi ...

Can some one help me with maxmasp in here? I hope so

Keld Hansen

mosc · Posted: Fri Nov 26, 2004 11:15 am Post subject:

keldhansen123, glad to have you here.

I don't use MAX/MSP myself, but there are a few people here that do. Hopefully someone will chime in.

play · Posted: Fri Nov 26, 2004 7:15 pm Post subject:

Hey. Haven't been very active on the board lately ("bad moderator, sit!") but, well, here I am. What seems to be the problem?

keldhansen123 · Joined: Nov 26, 2004 Posts: 8 Location: Denmark

Hi ... Thank you for helping ...

I just need some one to explain this patch Smile

Is should be a pretty simple patch. But i dont get the math in it.

Here are my questions for the patch:

*What does the "signal multiply operator" ?
*Why do they use 127 in this patch?
*And why du'o they divide by 127?
*Do they divide by 127 because MaxMsp only can handle 1 and 0 ?

I hope you understand my questions Wink

Keld

keldhansen123 · Joined: Nov 26, 2004 Posts: 8 Location: Denmark

Here is the patch ...

patch1.zip

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patch1.zip

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708 Bytes

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diskonext · Joined: Aug 26, 2004 Posts: 306 Location: London, UK

Well,

Max can represent any number, but when working with signals the 0..1 range is most commonly used.

The real reason the / 127's are there is because the hslider-object (the horizontal slider) has a minimum increment of 1 and defaults to 0..127 (which conveniently resembles the normal MIDI values), which needs to be mapped back to the 0..1 range.

Max/MSP comes with excellent documentation, if you downloaded the demo without the documentation check out: http://www.cycling74.com/products/dldoc.html

The tutorials are really helpful and to the point, as well.

-diskonext

play · Posted: Sat Nov 27, 2004 5:01 pm Post subject:

I agree, grab the manuals. A lot of the stuff in there is helpful in a general way. For instance, I didn't really get FFT/convolution stuff until I read the explanation in the MSP manual. Very helpful and straight forward.

keldhansen123 · Joined: Nov 26, 2004 Posts: 8 Location: Denmark

Thanks a lot ... this really help Smile

But i have a last question ... what about the "expr 127-$1" ... I dont get that ...

Keld

play · Posted: Sun Nov 28, 2004 11:58 am Post subject:

'expr' is used to evaluate mathematical expressions and whenever you see a '$' symbol in max it means a variable. The number after the '$' is the number of the inlet counted from left to right so 'expr 127 - $1' can be read as 127 minus whatever is coming into the first inlet. This is to make the values inverted as compared to the values of the left-hand operations to make the panning work. If one of the values being multiplied by an audio signal was not inverted then this patch would just be a very complicated volume control.

keldhansen123 · Joined: Nov 26, 2004 Posts: 8 Location: Denmark

Hi ... Thanks a lot Smile

Now I have another problem Smile

I have attached the patch.

I dont think that it is the patch which is the problem, but i think it's a problem with our soundcard settings in MaxMsp. The soundcard is a Soundblaster Live Value (4 channels).

The problem is that the patch links the front and rear speakers rather than distinguish them from each other.

Can some one help me?

Keld Hansen

patch2.zip

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Download (listen)

Filename:

patch2.zip

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1.11 KB

Downloaded:

423 Time(s)

mosc · Posted: Mon Nov 29, 2004 8:24 am Post subject:

I'm not running MAX so I can't help with the problem, but would it help if I enabled another type of file extension for MAX patches?

diskonext · Joined: Aug 26, 2004 Posts: 306 Location: London, UK

Most common MAX filetypes:

.mxb
.mxt
.pat

-diskonext

diskonext · Joined: Aug 26, 2004 Posts: 306 Location: London, UK

The patch seems to work fine.

Check to see if outputs 1, 2, 3, 4 (see dac~) are correctly routed to their respective channels, maybe?

There are both logical channels (which you use with dac~ and adc~ objects), and physical channels. The mapping between them is in Options->DSP Status->I/O Mappings.

-diskonext

mosc · Posted: Mon Nov 29, 2004 8:35 pm Post subject:

play · Posted: Thu Dec 02, 2004 8:18 pm Post subject:

thanks mosc.

Patch looks fine to me. I have a SBextigy running on this laptop and Max doesn't seem to want to recognize the rear channels. Perhaps this is a problem with creative cards in general. I know that ableton live has problems with this as well. The NI software seems to handle SB's pretty wel though. I would suggest going out and buying a M-Audio audiophile 24/96 card for $100. Problem solved.