So, the TI's sound engine..... - Page 2 - The Unofficial Access Virus & Virus TI Forum

Tomer=Trance · #11 13.12.2004, 12:40 PM

i see...
so what not creat a memory slot and sell a memory expension for the virus?

Timo · #12 13.12.2004, 01:38 PM

What actually happens to the 64 wave-shapes when partially mixed (say, 50:50) with the saw wave of the Virus presently? Are they morphed mathematically (using vectors, formulae, or otherwise, perhaps?) from one to another, or just added (cross-faded) together?

ben crosland · #13 13.12.2004, 01:46 PM

Quote:

Originally Posted by Timo

What actually happens to the 64 wave-shapes when partially mixed (say, 50:50) with the saw wave of the Virus presently? Are they morphed mathematically (using vectors, formulae, or otherwise perhaps?) from one to another, or just added (cross-faded) together?

They are crossfaded.

Timo · #14 13.12.2004, 01:49 PM

Thanks Ben. So the fade from the actual Saw to Square waveforms are morphed, then (as opposed to cross-faded?).

ben crosland · #15 13.12.2004, 01:57 PM

Quote:

Originally Posted by Timo

Thanks Ben. So the fade from the actual Saw to Square waveforms are morphed, then (as opposed to cross-faded?).

No - they're crossfaded too.

Timo · #16 13.12.2004, 06:12 PM

Quote:

Originally Posted by ben crosland

Quote:

Originally Posted by Timo

Thanks Ben. So the fade from the actual Saw to Square waveforms are morphed, then (as opposed to cross-faded?).

No - they're crossfaded too.

Ahhh, interesting! So, the stock saw and square waveforms are basically PCM samples, too? If not, why would anyone wish to generate those waveforms on-the-fly using valuable DSP, when a PCM sample of a saw could be used as if it were one of the other 62 waveshapes? Or does generating a saw/sq in realtime use less DSP than playing back a PCM sample? I'm a noob where synth design is concerned, just an end-user really, so sorry for the basic Q's.

Timo · #17 13.12.2004, 06:23 PM

Ah, the Square wave at least can't be a sampled PCM file, as it employs PWM, of course (silly me), but the Saw waveform stays relatively static - So having a sampled set of saw waves with different characters would work, but having a set of classic square waves wouldn't be possible without using extra DSP as they will each need to call upon PWM to make them each as flexible as normal.

ben crosland · #18 13.12.2004, 07:21 PM

Quote:

Originally Posted by Timo

Ah, the Square wave at least can't be a sampled PCM file, as it employs PWM, of course (silly me), but the Saw waveform stays relatively static - So having a sampled set of saw waves with different characters would work, but having a set of classic square waves wouldn't be possible without using extra DSP as they will each need to call upon PWM to make them each as flexible as normal.

The main 3 waveforms - Sine, Saw and Square, are calculated with DSP.

wildbill · #19 15.12.2004, 12:36 AM

it sounds like the rest of the waveforms are samples then?

Targon · #20 15.12.2004, 10:32 AM

Nice idea, only the missed 1 important element- a joystick or a X/Y pad (kaos type pad).

I need a new virus like my old indigo, the polar fits the bill but i find this to be one of the most ugly an off putting machines out there.

Is there a different color scheme like Silver case, black knobs an blue LED's oh an NO woodgrain?

Hi-tech machines, but they all try to make them look retro...how bout carbon fiber front panel with kevlar sides and blue LED's with black knobs????

the desktop and the keyboard look dope (except for the wood sides), why make the small keyboard the ugly white elephant?

im not buying an ugly machine...