Author Topic: Boss FB-2 Feedback Boost  (Read 192 times)

Aentons

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Boss FB-2 Feedback Boost
« on: September 07, 2018, 08:52:22 AM »
Is digital the only way to generate feedback in a pedal like the Boss FB-2 does?

I know there are the feedback loop type pedals out there which seems to be something different.


Aentons

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Re: Boss FB-2 Feedback Boost
« Reply #1 on: September 13, 2018, 11:18:09 AM »
I found some comments about how the the Digitech Freqout does it digitally. (Also, There is apparently a Fender Runaway feedback pedal that does something similar but is housed in a wah type enclosure.)


'According to musicradar, it uses a "cunning inversion of dbxs feedback-suppression technology"'

"...utilises a combination of pitch-shifting and reversed feedback suppression tech"

"There's a DSP chip that analyzes your signal and outputs a simulated signal in a cancelled phase..."




I think this is the "feedback suppression tech" that is referenced, and there is a very interesting document that goes really in depth about how it works:

https://dbxpro.com/en-US/products/afs2

https://3e7777c294b9bcaa5486-bc95634e606bab3d0a267a5a7901c44d.ssl.cf2.rackcdn.com/product_documents/documents/2081_1415289942/Feedback_Prevention_And_Suppression_original.pdf


It seems like at least something interesting could be done non-digitally with compression and the mixing of the phase cancelled signal even if it doesn't sound exactly like natural feedback.
« Last Edit: September 13, 2018, 11:25:10 AM by Aentons »