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  • Author Author: alexwonglik1
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Audio Looper powered by Nexys Video

alexwonglik1

Digilent Nexys VideoDigilent Nexys Video, Xilinx Artix 7-200T platform ( More InfoMore Info ), is an ideal development board for audio/video applications. There are three high-speed digital video ports, and a 24-bit audio codec on board.

 

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With the on board memory and audio ports, Digilent engineer built an audio looper on Nexys Video. There are 16 banks so that users can record audio tracks and play them back at the same time. The audio data is sampled at 48KHz through on-board line in jack. The audio signals are then output through on-board line out jack. While a bank is playing, users can record additional tracks on other banks. If users play/record on a bank that is already playing, it will overwrite the audio on that bank.

 

Read all the steps and download the necessary files in Digilent Wiki Page to build your audio looper.

 

 

  • in reply to balearicdynamics

    (The JIVE servers appear to be a little out of sync today - your reply to Dubbie has only just appeared here 10mins after I had posted my comment even though it appears to have been posted 30mins earlier. image)

     

    In the AV industry, they appear to be starting to adopt more generic encoder/decoder boxes. Whereas you used to have to buy an encoder and a matching decoder, some of the manufacturers are providing a single FPGA equipped box that can perform both functions and are user-selectable at install time. Also in some cases, inputs and outputs are becoming interchangeable - a 2:1 HDMI switcher can become a 1:2 HDMI splitter based upon the FPGA design and installation requirement.

     

    'Firmware' updates now can update the FPGA bitstream so effectively updating parts of the 'hardware' design' as well as the software controlling it.

  • in reply to beacon_dave

    Yes, I commented on the sentence of Dubbie referred to that device used as this kind of instrument, not on the device itself. It is more powerful and the real value-added resource is the possibility to change the hardware behavior just with software, a fascinating aspect for me.

  • in reply to Jan Cumps

    I guess that it is a bit like trying to compare the price of a television with that of a radio.

     

    If you start to look at commercial video products that have three video outputs then you quickly start to end up in the $500+ arena.

     

    One interesting feature of FPGA based devices is that they start to become multifunctional.

    The 'audio looper' becomes a generic audio device whose 'personality' can be set by the user at the time of deployment. One gig it is used as a looper, the next it is used as a spectrum analyser, the next a graphic EQ...

  • in reply to Jan Cumps

    Correct, and probably I was not explaining what I meant. I answered to Dubbie, contextualized. Then, I think instead that with these boards in the audio field more and more things can be added to this demo project. This is the interesting aspect, indeed.

     

    Enrico

  • in reply to balearicdynamics

    True but this is the price for an elaborate design board. Not for a digital recorder - that's an example project. Blinking LEDs are also cheaper than Arduinos image.