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Ok I really wanted to follow up on the 2012 thread but it's closed. Link here:
https://www.edaboard.com/showthread.php?259953-Arturia-s-True-Analog-Emulation-how-does-it-work
Anyway... the issue I've been puzzling over is to how to generate the raw sawtooth, triangle, pulse or square wave which...
Can anyone tell me what the symbol is in the top of this schematic between the + power supply and the transistors?
https://www.linuxmotors.com/2096.png
Thanks!
I'm pretty sure I couldn't hear the small side band (it's visible in your 2nd image) but maybe someone could. The effect would be most pronounced right near the 22050hz frequency I'd guess.
The main point is sampling itself isn't perfect, and (evidently) even at CD quality some people aren't...
The sampling itself introduces the beats. I think of it this way: Imagine the step is .999999 of the Nyquist frequency. Every cycle there is a small residue as you're moving through the sine wave. If you start out aligned with the max and min, some time later you'll drift to the point where...
I wanted to comment on this. That issue of the Nyquist frequency being the cutoff has always bugged me. Nyquist frequency is 1/2 the sampling rate. It's clear you can't represent a frequency higher than the Nyquist frequency. But what isn't made clear is the distortion even at the Nyquist...
I have been investigating the issue in more detail. My approach was to hack into the code using the software installed on WindowsXP and using the Syser debugger. I can setup the Moog synth to generate 32 polyphonic voices that play continuously, and this bogs down the cpu. Then I can interrupt...
I've played with the Arturia program, there is even a free time limited trial of it. The output is very clean, and from playing with it I'm convinced it's the real deal. The sounds it generates are just like the ones I'm used to hearing.
I know the concept is possible, I'm just wondering about...
The idea of fixed point is you have whole number values (integers) and some number of bits on the low end represent the fractional value, and the rest represent the whole number value.
So suppose your numbers are 32 bits. You could have 8 bits fractional part and 23 bits for the whole number...
Arturia is a company that sells software synthesizers, one of them emulates the Moog. They brag about their approach, calling it True Analog Emulation. One feature they describe is the approach does not generate any aliased frequences, unlike a competitor's product.
The aliased frequencies they...
I think I may have some useful insights, but I'm not sure if it will answer your question.
Sine waves have a period of 2pi, which is an irrational number. Computers can only approximate irrational numbers. Whenever you go to sample your sine wave, you're taking an approximation in the value...
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