Wav Table Synth

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Wav Table Synth

Postby acg2010 on Thu Jun 21, 2012 3:28 pm

Here is my curent work in progress: a wave table synth. It has two main wave table oscillators with several pre-loaded wave tables and capability to load your own, oscillator detuners, a noise oscillator, standard filter, two LFOs with routing and additional wave table loading, standard chorus module, display module with trogluddite's phosphor module to give the display a persistence effect and range/sample size selectors, "fattener/detuner" control, ability to add additional oscillator voices, and oddson's chords module.

Capable of generating some interesting sounds.
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Re: Wav Table Synth

Postby trogluddite on Thu Jun 21, 2012 5:33 pm

acg2010 wrote:Capable of generating some interesting sounds.

Yes, I like the way that you are not afraid to make use of plenty of enharmonic elements - they always add a good dose of 'mystery' (sure there is a better word for what I mean). There is a certain 'character' to the tables you have chosen that I like too - somehow gives it a certain 'personality' instead of trying to be 'all things to all men'.
...and the jiggling title bar is kind of funky (made me jump the first time!)

I noticed a couple of weird things with the scope (nice to see that module finding a use, by the way - it really adds to the vintage sci-fi feel).
1) If you enable it and then turn it back off again, the effect remains (although with a slightly different appearance). I would suggest using a multiplexer to bypass the 'phosphor' module completely when turned off - and even block the triggers to that module too to save CPU when it cannot be seen (the internal calculations are independent of whether it is connected to the view).
2) A weird black point that grows inwards from the top left. I think this is probably caused by the imprecision of round raster shapes, so that something is 'leaking' in from beyond the circular border.. This goes away if you connect the module "Outline" direct to the main view input of the display, so that it is not fed into the 'phosphors'.
I can see why you use the 'daisy chaining' of graphics modules - it does greatly simplify the ordering of the layers - but the draw order can also be dictated by the order in which you connect multiple view links to a common node (though it is rather trickier to manage when prototyping!)
Feel free to use any schematics and algorithms I post on the forum in your own designs - a credit is appreciated (but not a requirement).
Don't stagnate, mutate to create. Without randomness and serendipity the earth would be just another barren rock.
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Re: Wav Table Synth

Postby acg2010 on Fri Jun 22, 2012 12:52 am

trogluddite wrote: I noticed a couple of weird things with the scope (nice to see that module finding a use, by the way - it really adds to the vintage sci-fi feel).
1) If you enable it and then turn it back off again, the effect remains (although with a slightly different appearance).


I had noticed that behavior too. Sometimes depending on the wave, the persistence takes a while to go away. If you turn off the phosphor before it returns to normal, it will freeze that part. If you turn it back on, it will disipate. I will try your suggestion.

trogluddite wrote: 2) A weird black point that grows inwards from the top left. I think this is probably caused by the imprecision of round raster shapes, so that something is 'leaking' in from beyond the circular border.. This goes away if you connect the module "Outline" direct to the main view input of the display, so that it is not fed into the 'phosphors'.


Yes, it gets worst if you have the range at full scale and play certain notes. Thanks for the suggestion for the module outline connection to the main input display.

As always, thanks for your insight and suggestions trogluddite.
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