MSX-EQ - PSG equalizer viewer

Looks amazing! Keep it up, mate

I would love to see Auf Wiedersehen Monty with this thing.

Looks cool! I want one in my collection!

hello
thank you very much for your interest for msx-eq
Now I am working on a case made of translucent SBS plastic, I will definitely show the results pretty soon.
The case will be freely available as a stl model, on github.
As I become more free time, I will try to write in more detail about the board.

I try to answer all questions received by e-mail. I am very sorry that a mistake crept into the e-mail in the main post, a more accurate email address: pyhesty @ gmail com

Okay, I think having lower frequencies on the left is more logical (it is how all audio equipment displays spectrum analysis). I think now a note played is shoppen on a single bar, maybe if you add a little value to the neighbouring bars (left and or right, maybe even a little as well to their neighbours) you will get a more even display. So say bar 3 is calculated to have value 6 (6 diodes on) then you could light up bar 2 and 4 with 4 diodes and and bar 1 and 5 with 2 diodes. If those bars also have notes playing they would override these values. Not sure how it will look in real life but in my mind it makes sense…

Yes, you are right, the low frequencies on the left are more in line with the spectrum analyzer. I made a variant with the position of low frequencies on the left, and high frequencies on the right. As soon as I have free time, I will record a video and try to compare together. From the point of view of the visual effect, I was guided by the mathematical distribution of the use of the dynamic range of specified frequencies in the AY chip. And until I evened out this distribution, the visual effect was going mostly in one part. I preferred that the bars on the left would light up first. At the moment, the distribution is evened out and the bars on average light up in the central part.
I'll post a video later, sorry not now.
Below is an image of the typical mathematical distribution of codes transmitted in AY (inverse note frequency)

I do not plan to expand the image of one channel to two neighboring ones yet, but I will think about it. This is still a hardware limitation.
For me, developing that device is a hobby. At the beginning of the work, I limited myself to only the element base of the late 199s and early 2000s, and also use a minimum of elements. A little later I will tell you in more detail which PLD is used.
Thank you very much for your interest.