Dealing with rollover (I think it's called) is discussed in Miller Puckett's "Theory and Techniques of Electronic Music" http://www-crca.ucsd.edu/~msp/techniques.htm. Therein he describes a couple of techniques like band limiting and upsampling.
I have played with the examples a little bit (which are included in the documentation with Pd 0.39), but I think it might be best to use externals to this end. creb has band limited oscillators (blosc~) but they are not included in the current pd-extended, so you'd either have to compile them in or wait.
Regarding filters, have you tried the moog~ filter? Also iemlib contains quite a few filters worth checking out. it's in Pd-extended.
Good luck,
Tristan
On 4/6/06, cyborgk@nocturnalnoize.com cyborgk@nocturnalnoize.com wrote:
Hello everyone,
I'm working on a set of abstractions that will allow users to easily sequence rhythmic-pattern style music; basically, to make it easy to create IDM/electro/minimal-techno style stuff. Anyway, there's one major weakness to the whole project: PD oscillators don't sound good! Also, the filters I've tried don't sound very analog at all.
So, my question is:
- Does anyone have any good, "analog-sounding" oscillators already
created? I guess I only need saw, PWM square, and triangle, but they need to sound GOOD (like Reaktor, basically). I see how to do simple versions from the example patches, but I don't know enough DSP to get rid of the digital sound. For a great example of the kind of sound I want, check out: Asynth vst from antti at smartelectronix. http://antti.smartelectronix.com/
What would be the most analog sounding filter to use?
Is wavetable synthesis a reasonable option? How do I create a custom
table to use for such synthesis? For example, if I synthesize a wave of one period in another program, how long should it be? I know this should be easy, but my brain is broken on this question. My gut instinct is that a wavetable would only sound good near original frequency or you just get the typical digital artifacts from pitch-shifting a sample... is that correct? I'm guessing what I'm really talking about is ROMpler style multi-sampling, and selecting the wave closest to input frequency. Don't know if anyone built this already.
Btw, I can solve the problem for myself by loading in the VST~ external, but I want what I build to be cross-platform so that it is most useful to interested people in the community.
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