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mtytel / helm

Helm - a free polyphonic synth with lots of modulation
http://tytel.org/helm
GNU General Public License v3.0
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Anti-Aliasing #174

Closed RCJacH closed 6 years ago

RCJacH commented 6 years ago

Is there any plan for implementation of any kind of anti-aliasing in the future? Currently the raw saw wave gets really harsh without band-limiting or over-sampled filters.

mtytel commented 6 years ago

Do you just mean in the inital patch or while enabling a filter? The raw waveforms are band limited so there shouldn't be any aliasing with them. The filters have some non-linearities which will alias at high drive values and if you enable cross-modulation you'll also get aliasing. I could definitely improve these two in the future.

mtytel commented 6 years ago

Hmmmm after looking at this, it seems that the band limiting kicks in at notes higher than middle C. I'll probably leave this how it is and improve the band limiting in my next synth since it would require some oversampling/decimation.