Forums > MaxMSP

DE-modulation

May 20, 2008 | 4:22 pm

I saw this analogue device that does ringmodulation and demodulation, this is the first ive ever heard of demodulation, I would love to know if anyone has done this in max and if its as easy as ringmodulation. (which as far as I know is just multiplying 2 signals)

its really cool, sounds like old space transmissions when you talk through it, I guess its what they used to use at nasa to encode and decode signals for radio transmission.

http://matrixsynth.blogspot.com/2008/05/make-noise-moddemod.html


May 21, 2008 | 10:41 am

I’m sure I’ve read other posts re this issue, but cant find anything using
google:

I have a bank of sample players that access a library containing a mix of
mono and stereo files.

I use groove to loop these sounds – but run into problems when I need to
play back a mono file – which results in sound in only one channel.

Sfplay~ has that great function "modout 1" that enables you to output mono
signal to all ( i.e L & R) outlets.

Are there any workarounds to get a patch using groove~ to do this?

Cheers

George Poonkhin Khut
Mobile 0417 566 425 (International 61 417 566 425)
E-mail george@georgekhut.com
URL http://www.georgekhut.com/


May 21, 2008 | 2:46 pm


May 21, 2008 | 4:00 pm

how is it that these unrelated posts show up in my thread? some kind of email/list confusion?

Anyway, anyone know how to demodulate a signal?

original post:

"I saw this analogue device that does ringmodulation and demodulation, this is the first ive ever heard of demodulation, I would love to know if anyone has done this in max and if its as easy as ringmodulation. (which as far as I know is just multiplying 2 signals)

its really cool, sounds like old space transmissions when you talk through it, I guess its what they used to use at nasa to encode and decode signals for radio transmission.

http://matrixsynth.blogspot.com/2008/05/make-noise-moddemod.htm
:


May 21, 2008 | 11:26 pm


May 21, 2008 | 11:28 pm

right about now I wish I could demodulate this thread


May 22, 2008 | 6:30 am

confusing indeed..


May 22, 2008 | 7:21 pm

Nicholas C. Raftis III skrev:
> I saw this analogue device that does ringmodulation and demodulation, this is the first ive ever heard of demodulation, I would love to know if anyone has done this in max and if its as easy as ringmodulation. (which as far as I know is just multiplying 2 signals)
I think it’s a really simple process, really.
Mod== *~
Demod== /~

I had a bit of fun by playing with the relationship between those two
parameters.
Andreas.

– Pasted Max Patch, click to expand. –

May 22, 2008 | 10:31 pm

Sorry, I forgot to mention I did try /~ but it didn’t sound like what I thought it would. In that demo the voice has this great subtle garbling, but when I do it in max it has a harsh buzz on top and not much else. Maybe thats just the beauty of analogue.


May 22, 2008 | 11:05 pm

Nicholas C. Raftis III skrev:
> Sorry, I forgot to mention I did try /~ but it didn’t sound like what I thought it would. In that demo the voice has this great subtle garbling, but when I do it in max it has a harsh buzz on top and not much else.
Yeah, I did get that one a lot, but then every now and then the tweaking
would converge on something like in the video, too. Noodling is a big
part of it, and I think it is on analogue modular patches too.

andreas


May 23, 2008 | 3:51 pm

funny, I asked the guy who created that demod device, apparently modulation and demodulation are the same circuit.


May 23, 2008 | 8:59 pm

Nicholas C. Raftis III skrev:
> funny, I asked the guy who created that demod device, apparently modulation and demodulation are the same circuit
That’s kind of funny, that. But yes, perfect demodulation would be done
with the exact same circuit and then phase reversal… theoretically, right?

alright, that’s it! No more futzing about with tiny sandbox patches.
Time for a noisemaker or two!

A.


May 23, 2008 | 11:15 pm

hehehe sorry, dont worry andreas Ill have something cool for everyone soon.


May 24, 2008 | 12:35 am

"But yes, perfect demodulation would be done with the exact same
circuit and then phase reversal… theoretically, right?"

Yes. For instance, you can decode the ring-modulated vocals at the
beginning of Aphex’s "Milk Man" by applying a ring mod. with the same
settings, but 180 degrees off.

On Fri, May 23, 2008 at 4:59 PM, Andreas Wetterberg
wrote:
> Nicholas C. Raftis III skrev:
>>
>> funny, I asked the guy who created that demod device, apparently
>> modulation and demodulation are the same circuit
>
> That’s kind of funny, that. But yes, perfect demodulation would be done with
> the exact same circuit and then phase reversal… theoretically, right?
>
>
> alright, that’s it! No more futzing about with tiny sandbox patches. Time
> for a noisemaker or two!
>
> A.
>


Morgan Sutherland


May 24, 2008 | 8:35 am

Nicholas C. Raftis III skrev:
> hehehe sorry, dont worry andreas Ill have something cool for everyone soon.
>
>
Bah, I was being imprecise. I meant "Andreas, no more futzing about!" –
I had a ton of fun last night NOT testing scenarios in Max, but rather
doing some blind patching. Fun fun fun.

Andreas


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