Is it possible to implement simple filters?

9 years 11 months ago #132 by loneduino84
Hello, I was wondering if there is an easy way to implement simple 1st and 2nd order bessel/chebyshef/butterworth filters with this platform?


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9 years 11 months ago #133 by JR
There was a guy describing how to implement quite advanced filters. I copy/paste his message:

I enjoyed discovering the pedalSHIELD - it was an inspiration for my own first steps in putting together an audio application on the DUE, which is described on my blog

My system implements a variable band-pass filter, using Fast Convolution, running at 44.1 / 48 kHz.

Whilst it was built for an application in Amateur Radio, extension to use as a general audio effect is obvious. The filter framework will support any filter shape (although the filter design aspect is currently specific to the band-pass application).

Unfortunately, my code isn't open source at the moment - it is part of a larger project.

I also enjoyed the wider scope of the ElectroSmash website, having done some analysis of the Tube Screamer myself,
and developed a MIDI-controlled TS.

Good luck with pedalSHIELD.


So you can use the Atmel DSP libraries or also try an easier approach, like implementing low pass filters in C for fixed points microcotrollers, like Microchip PICs

keep it simple

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9 years 1 month ago #283 by droz

I can't always use my amplifier, so I use guitar --> distortion effect --> small mixer --> headphones. Guitar sound was far from good, so I've built simple analog cabinet simulator. Now the sound is better.

Have anybody tried to program the pedalSHIELD to use it as a speaker/cabinet simulator?



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