What does Wave Table Read want?

stefan · 20 Jun 2006

You should first create the table using the Wave Table component. This however doesn't take an buffer as an input, so you'd have to convert the buffer (that you've loaded with the Wave File component) to an array. This can be done by creating an array with the Float Array component and then propagate over the values from the buffer into the array.

inverseroom · 20 Jun 2006

Oh my...Stefan, I don't understand that at all. I'm a pretty quick study & I'm sure I can do it, but is there a tutorial up anywhere on this subject? This is literally my first week on the software and I'm just groping around in the dark.

I realize you have better things to do than advise newbies on simple operations...so I appreciate your help here...

Interestingly enough, BTW, in desperation last night, I just opened up the Audacity file with the waveform in it and hand-drew a version of it in wave draw. And damned if it didn't sound pretty similar...it could be interesting to allow wave draw to accept a .bmp or .tif or something eventually...

angstrom · 20 Jun 2006

I just uploaded a file to the wiki

[old link]

no time to explain but it should do what you want.

stefan · 20 Jun 2006

\o/

inverseroom · 20 Jun 2006

thanks, angstrom, this is great! I'll give it a try this evening. I was thinking of asking Stefan for a screenshot, but this is even better...I'll peek inside and see how it's done. 🙂

TheAudiophileDutchman · 21 Jun 2006

Hi there guys, 🙂

Excellent thread! To take things one step further, I would like to know how to implement 'perfect' wavetable extraction from samples within SM. Or, to put it like this, what functionality/inputs-outputs would be needed (if any) to make this programmable by SM users?

A workflow description could look like this:

1. Determine the fundamental frequency of the sample (e.g. using one of Sambean's SM algorithms) at the position where the wavetable is to be extracted and cut-out exactly one cycle (period).

2. Periodically extend this one-cycle in such a way that phaselocking of adjacent wavetables is guaranteed.

3. Extract the one-cycle wavetable from the periodically extended wave snippet by resampling.

Reference: 😇 http://www.musicdsp.org/files/Wavetable-101.pdf

TheAudiophileDutchman · 21 Jun 2006

Hi inverseroom, 🙂

I tried Angstrom's method: loading a MONO 16bit sample into the wavetable, coming from the 'female mellotron choir'-library (which I used earlier to demonstrate the use of a wave array). For me this worked fine, except for not exactly yielding a one-cycle wavetable of course (given the currently fixed number of 256 points). 😉

TAD

inverseroom · 21 Jun 2006

TheAudiophileDutchman wrote: Hi inverseroom, 🙂

I tried Angstrom's method: loading a MONO 16bit sample into the wavetable, coming from the 'female mellotron choir'-library (which I used earlier to demonstrate the use of a wave array). For me this worked fine, except for not exactly yielding a one-cycle wavetable of course (given the currently fixed number of 256 points). 😉

TAD

I'll mess around some more, then, and see if I can get results. Did you first cut your sample down to one cycle?

If you have a moment, post a screenshot! I may be missing some fundamental link in the equation that is obvious to all you experienced users...

angstrom · 21 Jun 2006

I didn't bother cutting my waves down, as the OSM will only take the first 256 chunk anyway (as I remember).

it's not ideal for multisamples btw - more for amusing waveforms for synths.

I seem to remember some kind of multisample thing by the audiophiledutchman somewhere - the EA forum?

inverseroom · 21 Jun 2006

Yeah, I'm not so interested in using them as multisamples...I've got Kontakt for that. I just want waveforms that are in the general spirit of the ones the sampled synth or organ in question makes. To that end, I could just use wave draw I suppose...but this solution seems so elegant...if in fact I can get it to work. 😉