Re: [Audacity-nyquist] gate function - error in manual?

[Roger D. <rb...@cs...>]

It looks to me like noise-gate is incorrectly implemented, but the 
documentation, snd-gate, and gate are all correct. Note that snd-gate 
and gate do not have the same parameter order. I'm guessing that I 
thought the order of parameters in gate was more logical than in 
snd-gate and ony "fixed it" in the dspprims.lsp code, but neither seems 
especially natural or logical to me now.

Steve, when you said "it looks to me like," is that because you read 
snd-gate or gate.alg instead of gate, or is there something I'm missing?

My conclusion is that noise-gate has a bug (parameter order in the call 
to gate), but gate and snd-gate are correctly implemented and documented.

-Roger



Leland wrote:
> Steve wrote:
>   
>> There appears to be an error in the Nyquist manual regarding the syntax
>> for the gate (and snd-gate) functions, or is this just a peculiarity of
>> Audacity?
>>
>> The manual states (v.2.37 and 3.02):
>> "(gate sound floor risetime falltime lookahead threshold)"
>>
>> but it looks to me like the correct syntax should be:
>> (gate sound lookahead risetime falltime floor threshold)
>>
>> Can anyone confirm this?
>>     
>
> You are correct...from the nyquist source:
>
> (GATE-ALG 
>
> (NAME "gate") 
>
> (ARGUMENTS ("sound_type" "signal") ("time_type" "lookahead") ("double" 
> "risetime")
>             ("double" "falltime") ("double" "floor") ("double" 
> "threshold"))
>
>
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