[PD] I'm stuck in a corner, please help! RE: [delta~] object was: Re: Cyclone in vanilla?
Enrique Erne
enrique at netpd.org
Fri Apr 25 13:04:10 CEST 2008
IOhannes m zmölnig wrote:
> Enrique Erne wrote:
>> IOhannes m zmölnig wrote:
>>> Enrique Erne wrote:
>>>> or [biquad~ 0 0 0 1]
>>>>
>>>>
>>>> Miller Puckette wrote:
>>>>> I believe z~ is just rzero~ 0.
>>> no.
>>> both of them are equivalent to [z~ 1]
>>>
>>> you could also argue that [f] is just the same as [0(
>>> :-)
>> oups, yes ofcorse z~ 1.
>>
>> the output of 1 sample with rzero~ 0, z~ 1 and biquad~ 0 0 0 1 seems to
>> be slightly different. if one wants to be fuzzy about that :) maybe ome
>> rounding problem?
>
> no, i don't see any rounding errors...
>
>> and now i even couldn't do the delwrite/read with the subpatch :( :(
>
> it's generally a good idea to tell [delwrite~] how much space it should
> allocate for the delayline. e.g. [delwrite~ abcd 1000] helped a lot...
>
>
> and [rzero~ 0] is not the same as [z~ 1].
>
>
> the output of [z~ 1] is y[n]=x[n-1]
> according to [rzero~]s help-patch it does the following:
>
> y[n]=x[n]-a[n]*x[n-1]
> since you set a[n] to "0", you just get y[n]=x[n] :-(
>
> to get [z~ 1], do something like
>
> |
> +--+
> | |
> | [rzero~ 1]
> | |
> [-~]
> |
thanks iohannes. it looks good now.
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