What cuts off high frequencies from Sega Genesis sound? \ VOGONS

What cuts off high frequencies from Sega Genesis sound?

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First post, by KJ_Jose

Posted on 2017-01-09, 12:07

KJ_Jose Offline

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I am confused on what cuts the high frequencies from sound on the Sega Genesis. I found on other sources it was 22050hz, but experimenting with the ring chime from Sonic, I found it to sound really bad on such a rate. So I think it must be 52khz, the chips' original sample rate, with a low-pass filter to make it sound like 22050hz.

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Reply 1 of 1, by Neco

Posted on 2017-01-24, 04:27

Neco Offline

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Should be a capacitor of some sort in the audio path on the PCB, no ?

You can probably find detailed pictures of various models and their audio circuits on sega-16.com for example, idk if this helps but it has some good info on it

http://www.sega-16.com/forum/showthread.php?2 … s-audio-circuit

The thread is about a replacement audio circuit, but idk maybe it will have some info you can use from the images or other posts.

Different models have different lowpass filters. The model 1 has a much heavier-handed one, but I like it the most because that's what I grew up hearing. Also depending on the model the audio circuit itself could sound worse (substituted / cheaper parts, chips, etc). Generally people distinguish the most between Model 1 & Model 2. Model 2 sounds more "harsh" as it lets more of the highs pass through.

Here's a sound quality thread

http://www.sega-16.com/forum/showthread.php?2 … s-mods-and-more

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