fons Posted November 3, 2014 Report Share Posted November 3, 2014 Hi, I saw this video from Jeri Ellsworth, in which she creates a bass guitar synth using a Papilio One to do the real-time string frequency analysis.I would like to know how she does the ADC conversion.I am new to FPGA's but AFAIK the Spartan 3E doesn't accept analog inputs. Am I right?Do you think she is using an ADC wing? In the video, it looks like look like she is plugin in the 4 analog inputs directly to the FPGA though, see https://www.youtube.com/watch?v=_kDhpFaf4EY#t=87 Link to comment Share on other sites More sharing options...
Jack Gassett Posted November 3, 2014 Report Share Posted November 3, 2014 Hello fons, I'm not completely sure what technique she is using, but I do remember her doing a youtube video about an ADC. There is also a xiinx app note that has code examples for an adc using an external comparator. Jack. Link to comment Share on other sites More sharing options...
fons Posted November 3, 2014 Author Report Share Posted November 3, 2014 Thanks for the hints Jack. She indeed uses a comparator before passing the signal in to the FPGA, I just didn't know the reason for it https://www.youtube.com/watch?v=_kDhpFaf4EY#t=63 Link to comment Share on other sites More sharing options...
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