Eval-Adau 1701 miniz / Sigma studio frequency

Hello,

We have quite a few example projects available for download on our wiki:

https://wiki.analog.com/resources/tools-software/sigmastudio/tutorials

There are 11 ADAU170x-Compatible Example Projects that you can use immediately with your board. You can also download projects for other SigmaDSP processors and look at those to get ideas for what SigmaDSP is capable of.

Device to get up on Monday so I'll look at it over the weekend. Thank you very much.

Hi Rob,

Hope your project is going OK. Below I attached some circuits you might wish to experiment with. The first one, Harmonics.dspproj, shows how a square wave contains a sine wave at its fundamental frequency along with odd-numbered multiples (harmonics) of that frequency. Un-check the mute box for each harmonic to see the wave shape change on your oscilloscope. You can add higher harmonics to achieve a better square wave, or add even-numbered harmonics to demonstrate other waveforms.

The other circuit demonstrates the sampling that occurs with DSP. At the normal rate of 48KHz, you can't observe sampling because it's hidden by the DAC's output filter. In this circuit a sample-hold is pulsed at only 6KHz, 1/8 the normal rate. If you feed in a sine wave at around 600 Hz, you should be able to observe the characteristic "stair-step" waveform this causes. Apply sound signals to the input, and listen for an effect known as "aliasing" -- when your input contains frequency components greater than half the sample rate. Aliasing gives speech a science-fiction quality, and makes music sound weird.

Best regards,

Bob

Hi Bob,

Sorry for the Delay I have trouble getting to the project.

I would like to thank you for "harmonics.dspproj" This project was very useful for me and part of it I used for my project.

I also wanted to ask you if you still have some similar "gadget´s". I think of you I might learn something.

Have a nice day, Rob.

Hi Rob,

Thanks so much for your kind reply! Since you found the harmonics project useful, you may like to perform the opposite -- start with a complex wave-shape and measure the harmonics it contains. This post:

https://ez.analog.com/thread/18952

shows how to do this using an old analog technique adapted to SigmaDSP. You can substitute an external input ADC for the triangle wave oscillator shown to measure harmonics in live or recorded sounds. Because this project works slowly, the external sound needs to be relatively constant (for example, the noise from a running machine). Nowadays you can do the same thing faster and better with a smartphone app running a Fast Fourier Transform (FFT). Unfortunately SIgmaDSP can't do that, but with it you can perform all sorts of signal processing ("brick-wall" filters, audio effects, and analog measurements) without warming up your soldering iron!

Now that you've been using SigmaStudio and your eval board for awhile, have you thought about any particular use or subject of interest? You might want to share that subject in a new discussion, so that others can answer. In addition, I'll continue to think about other gadgets I've done or could try myself.

Best regards,

Bob

In my opinion, the device has a lot of options for its use, for the moment you own it I explored only the minimum of its potential. If you think of something useful, imaginative, practical and like to share. And thank you for help