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asb2m10 / dexed

DX7 FM multi plaform/multi format plugin
GNU General Public License v3.0
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Dexed needs a DC filter on the output #61

Closed MD-78 closed 7 years ago

MD-78 commented 8 years ago

0.9.1 x64

Many patches ("BANKS, T." as good example) have pretty high content at 25 Hz. I don't think that this should be there. I think there should be a Highpass filter (at 10 Hz maybe) on the output.

dc

asb2m10 commented 8 years ago

Humm.. maybe. Can I run DIGICheck without having a RME card ?

MD-78 commented 8 years ago

No, it needs a RME card. Maybe you can test/see it with other VST analysers:

http://www.voxengo.com/product/anspec http://www.voxengo.com/product/span

In DIGICheck the 25 Hz band actually is showing the level of all frequencies below 25 Hz (down to 0 Hz).

MD-78 commented 7 years ago

0.9.2 still has this issue.

asb2m10 commented 7 years ago

FM can generate a huge amount of low frequency (in the above screenshot is -40db for just >25Hz it is impressive).

Let's not forget that a DC filter is just a filter and going beyond (maybe) -5db, it will modify the audible range and I don't want that. I would be curious to see how the DX7 implements this.