Isosceles_CAT

Hello, I am trying to build a basic 'classic' vocoder in MaxMSP, preferably using only native maxmsp objects.

The plan is to build a pfft~ with 16 bins, and then use a snapshot~/line combo on each bin to create the envelope control signals to be used on the carrier bins.

The problem is I have no idea how I take the output of the cartopol~ object and change it from a frame of bin amplitudes into individual streams of numbers (and then back).

Can anyone provide me with some pointers?

Hello, I am trying to build a basic 'classic' vocoder in MaxMSP, preferably using only native maxmsp objects. 

The plan is to build a pfft~ with 16 bins, and then use a snapshot~/line combo on each bin to create the envelope control signals to be used on the carrier bins. 

The problem is I have no idea how I take the output of the cartopol~ object and change it from a frame of bin amplitudes into individual streams of numbers (and then back). 

amplitude-vocoder

> Hello, I am trying to build a basic 'classic' vocoder in MaxMSP,

> preferably using only native maxmsp objects.

> The plan is to build a pfft~ with 16 bins, and then use a

> snapshot~/line combo on each bin to create the envelope control

> signals to be used on the carrier bins.

A classic vocoder has nothing to do with fft, the bins of a fft have an 

equal bandwidth in frequency, a vocoder has frequency bands of equal 

intervals. Classic would be some use of fffb~ and envelope followers...

Joshua Hemming schrieb:
> Hello, I am trying to build a basic 'classic' vocoder in MaxMSP,
> preferably using only native maxmsp objects.
>
> The plan is to build a pfft~ with 16 bins, and then use a
> snapshot~/line combo on each bin to create the envelope control
> signals to be used on the carrier bins.

A classic vocoder has nothing to do with fft, the bins of a fft have an 
equal bandwidth in frequency, a vocoder has frequency bands of equal 
intervals. Classic would be some use of fffb~ and envelope followers...

-- 
Stefan Tiedje------------x-------
--_____-----------|--------------
--(_|_ ----|-----|-----()-------
-- _|_)----|-----()--------------
----------()--------www.ccmix.com


So now I'm thinking I'll run the signals through an fffb~ each, and then use abs~ & line~ on the outputs of the modulator to generate the control signal for the carrier. Does that sound about right?

I'd recommend putting an envelope follower on the output of each 

filter. An envelope follower is very easy to make in MaxMSP - I've 

posted one I made on here a few times in past months, for example. 

On Mar 7, 2008, at 10:48 AM, Joshua Hemming wrote:

> So now I'm thinking I'll run the signals through an fffb~ each, and 

> then use abs~ & line~ on the outputs of the modulator to generate 

> the control signal for the carrier. Does that sound about right?

I'd recommend putting an envelope follower on the output of each  
filter. An envelope follower is very easy to make in MaxMSP - I've  
posted one I made on here a few times in past months, for example.  
You can search the forum for it.

>
> So now I'm thinking I'll run the signals through an fffb~ each, and  
> then use abs~ & line~ on the outputs of the modulator to generate  
> the control signal for the carrier. Does that sound about right?
>

----
Steven M. Miller
Professor, Contemporary Music Program
College of Santa Fe

Home 
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Thats certainly the idea... However, until I get home tonight I can't try anything out, but I am daydreaming about objects that can be used to create a decent envelope follower. Some combo of abs~, line~, rampsmooth~ ought to do it, I reckon.

Thanks kindly for offering your patch, but I'd like to try to build it myself for now. If you have some caveats or advice in this regard, I would be most greatful. :)

Thats certainly the idea... However, until I get home tonight I can't try anything out, but I am daydreaming about objects that can be used to create a decent envelope follower. Some combo of abs~, line~, rampsmooth~ ought to do it, I reckon. 

I used a simple combination of [abs~] and [slide~], along with a 

couple of [mstosamps~] to specify attack and release times in ms for 

On Mar 7, 2008, at 12:19 PM, Joshua Hemming wrote:

> Thats certainly the idea... However, until I get home tonight I 

> can't try anything out, but I am daydreaming about objects that can 

> be used to create a decent envelope follower. Some combo of abs~, 

> line~, rampsmooth~ ought to do it, I reckon.

> Thanks kindly for offering your patch, but I'd like to try to build 

> it myself for now. If you have some caveats or advice in this 

I used a simple combination of [abs~] and [slide~], along with a  
couple of [mstosamps~] to specify attack and release times in ms for  
input to [slide~].

>
> Thats certainly the idea... However, until I get home tonight I  
> can't try anything out, but I am daydreaming about objects that can  
> be used to create a decent envelope follower. Some combo of abs~,  
> line~, rampsmooth~ ought to do it, I reckon.
>
> Thanks kindly for offering your patch, but I'd like to try to build  
> it myself for now. If you have some caveats or advice in this  
> regard, I would be most greatful. :)

> Thanks kindly for offering your patch, but I'd like to try to build it myself for now.

If you get stuck, you can always take a peek inside the examples/effects/classic-vocoder-folder, part of the max folder. It contains a good example from Marcel Wiercks.

Amplitude Vocoder