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by Tade0
2236 days ago
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Sounds great and I had to listen to both of the samples to guess correctly. That being said the Tube Screamer is a somewhat simple effect: it's just a distortion with the clipping diodes moved to the feedback loop. How possible would it be to get the famous A/B class amplifier voltage sag and associated changes in parameters of the whole amplifier, or in other words "will it chug"? |
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Many of the techniques discussed were variations on image processing - transforming the input to the frequency domain then converting this to an image, and applying standard techniques to transform the image, then back to the time domain. There are many compromises with this approach (loosing phase information for example) but with a suitable overlap/add the results were better than I expected, and certainly there's room for further investigation to see if there's useful stuff in there.
Another time domain approach that was applicable to your amplifier model question was an attempt to determine hidden variables in a circuit. Basically, the circuit under test is examined, and rather that build a spice model (which can be laborious) the technique was to expose the interval voltages following components with memory (so capacitors for example). These outputs were included in the NN training model, and so in effect the normally hidden internal state was exposed and allowed for a very good approximation.
Here's the paper:
http://dafx2019.bcu.ac.uk/papers/DAFx2019_paper_42.pdf