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TOPIC: Audio: Guitar Spectrum Meter (16x16 Resolution)

Audio: Guitar Spectrum Meter (16x16 Resolution) 3 years 3 weeks ago #1875

Ray
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This code is very similar to www.electrosmash.com/forum/arduino-audio...eter-32x8-resolution

In this program the frequency response is a bit more limited as the guitar does not cover the whole audio range, fom 0 to 10KHz is more than enough.
This is why in the code you will see:

		    // 1st column, up		
        lc.setColumn(0, 7, bitswap(bar(av(fht_log_out, 0, 4) * 1)));
        lc.setColumn(0, 6, bitswap(bar(av(fht_log_out, 5, 9) * 1)));
        lc.setColumn(0, 5, bitswap(bar(av(fht_log_out, 10, 14) * 1))); 
        lc.setColumn(0, 4, bitswap(bar(av(fht_log_out, 15, 19) * 1)));
        lc.setColumn(0, 3, bitswap(bar(av(fht_log_out, 20, 24) * 1.4)));
        lc.setColumn(0, 2, bitswap(bar(av(fht_log_out, 25, 29) * 1.4)));
        lc.setColumn(0, 1, bitswap(bar(av(fht_log_out, 30, 34) * 1.4)));
        lc.setColumn(0, 0, bitswap(bar(av(fht_log_out, 35, 39) * 1.4)));      
        // 2nd column, up
        lc.setColumn(1, 7,bitswap(bar(av(fht_log_out, 40, 44) * 2)));
        lc.setColumn(1, 6,bitswap(bar(av(fht_log_out, 45, 49) * 2)));
        lc.setColumn(1, 5,bitswap(bar(av(fht_log_out, 50, 54) * 2)));
        lc.setColumn(1, 4,bitswap(bar(av(fht_log_out, 55, 59) * 2)));
        lc.setColumn(1, 3,bitswap(bar(av(fht_log_out, 60, 64) * 2.1)));
        lc.setColumn(1, 2,bitswap(bar(av(fht_log_out, 65, 69) * 2.1)));
        lc.setColumn(1, 1,bitswap(bar(av(fht_log_out, 70, 74) * 2.1)));
        lc.setColumn(1, 0,bitswap(bar(av(fht_log_out, 75, 100) * 2.1)));

Reaching up to "75" instead of the higher frequency "124" that you can see on www.electrosmash.com/forum/arduino-audio...eter-32x8-resolution.

You can also play with the multiplication factors 1, 1.4, 2, 2.1, etc They will give more/less enphasis to certain frequency ranges
With the gain potentiometer you can let more signal into the program.
All the libraries are included in the folder, you just need to unzip and compile

Hope you enjoy it:

File Attachment:

File Name: Spectrum_meter_16x16.zip
File Size: 588 KB

Last Edit: 3 years 3 weeks ago by Ray.

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Audio: Guitar Spectrum Meter (16x16 Resolution)