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Old 13 March 2017, 19:14   #14
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Join Date: Sep 2012
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Originally Posted by Foebane View Post
Why did Commodore even PUT filters into the Amiga machines to begin with? I doubt it was an Amiga decision.
Because the DAC generated overtones which could be attenuated with the low pass filter. The audio was probably more accurate with the filter on (i.e. if you try to play a pure sine tone, it is cleaner with the filter on), but people got used to and liked the sound of these artificial harmonics so in the end most people turned off the filter. The overtones is a part of what makes an Amiga sound like an Amiga, just like the distortion in a SID chip is a big part of the C64 sound.

The filter also limited the frequency range, but as the overtones overlap with part of the audio, they cannot be separated.
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