[PD] bandlimited wavetables for pd vanilla

Claude Heiland-Allen claude at mathr.co.uk
Mon Mar 2 18:11:08 CET 2015

Hi all,

Another update to pd-bl:


I added a 4x upsampled version to the example patch, together with a 
10th-order lowpass filter to prevent aliasing when downsampling.  The 
harmonic content is much more present in the top end, the non-upsampled 
examples now sound very muffled in comparison.

Note that it is crucial to put the phasor~ in the upsampled patch, 
otherwise the phasor~ will be aliased before even getting to the 
bl-tabread4c~ -- garbage in, garbage out...

On 26/02/15 20:28, Claude Heiland-Allen wrote:
>>>> Disadvantages:
>>>> * The higher harmonics are reduced compared to an optimal method.

It seems 4x upsampling fixes this, but CPU usage will be higher.



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