Scientific & Academic Digital Audio Resources

stschoen

Me too. I was reading up this morning to see if I could get a better understanding of the filter you're using in the Peng! module. I'm thinking of building a stripped down version to see if I can lower the CPU load. Have you played with the bi-quad node and does it do better for usage?

RobertSyrett

Whoa buddy, how are you reading my mind!? I was thinking of doing the same, but seeing if I could use model the Peng! envelope and use sine/triangle waves. The biquad filter is still pretty enigmatic to me at the moment.

biminiroad

@stschoen @RobertSyrett supposedly the BiQuad is a great filter for static stuff where you're not modulating the cutoff point, and z-1 filters are better for filter FM'ing etc. So like the all-pass filters in the big reverb wouldn't necessarily benefit from z-1. At least that's what I'm told/have heard.

stschoen

I've be playing with the standard filter node and getting pretty good results. I haven't checked to see if there is much difference in CPU usage.

stschoen

Interesting paper on morphing: http://digitalmusics.dartmouth.edu/~larry/published_articles/icmc_articles/polansky_mckinney.pdf

Scarez0r

There's the Miller Puckette book ( The Pure Data Creator) here ! http://msp.ucsd.edu/techniques/v0.03/book.pdf :)

Quite techy. (First post here, hey guys :D )

stschoen

Looks like some excellent information.

erikjms

A couple of years ago I reviewed all of high school math at Khan Academy

https://www.khanacademy.org/

starting with Pre-Algebra

https://www.khanacademy.org/math/pre-algebra

which reviews fractions, ratios, and exponents and all the stuff I was very surprised to have completely forgotten after years of humanities nerd-dom. I haven't finished calculus yet but got a much better grasp on trig than I did the first time around in 197mumblemumble. I skipped ahead to linear algebra because I wanted to learn about matrix transforms for graphics programming.

I find Sal's videos to be extremely well-explained. He goes step by step through every single concept he presents and through every single example problem he works through. Since it is self-paced, I find it useful to have a project that I need a particular kind of math for in order to be able to discipline myself to get through it. Like I said--haven't gone back and finished calculus yet although I think I might have to in order to really understand Fourier Analysis. I keep trying shortcuts and they keep losing me. :)

biminiroad

@erikjms - Khan Academy was essential for me completely understanding the Phasor node! Very good stuff.

stschoen

An interesting paper on simulating vacuum tube audio amps:
http://www.mitpressjournals.org/doi/pdf/10.1162/comj.2009.33.2.85
Paper on simulating Buchla LPG circuits:
http://research.spa.aalto.fi/publications/papers/dafx13-lpg/DAFx2013-LPG.pdf
Contributed by @biminiroad

biminiroad

Amazing web app for filters:

http://www.micromodeler.com/dsp/

biminiroad

@robertsyrett @stschoen @sansnom y’all would love the thing above

biminiroad

Great article on envelope detection - I know @robertsyrett and @stschoen are maybe doing compressors? Worth a look:

https://www.dsprelated.com/showarticle/938.php

stschoen

Thanks for the links, I’ll check them out when I get home

stschoen

Interesting set of slides on dynamic range compression: http://c4dm.eecs.qmul.ac.uk/audioengineering/compressors/documents/Reiss-Tutorialondynamicrangecompression.pdf

stschoen

Here's the paper that goes with the slides on dynamic range compression: https://www.researchgate.net/publication/277772168_Digital_Dynamic_Range_Compressor_Design-A_Tutorial_and_Analysis

Howdy, Stranger!

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