[PD] plugin~ external

[tim vets]

2010/6/14 Kim Cascone <kim at anechoicmedia.com>

>
> I'm  trying to figure out the correct way to send control data to the svf
> plug
>
> following how [plugin~]  is supposed to  work:
>
>  the message is:
>> "port <symbol:direction> <symbol:type> <symbol:name> <float:lowerlimit>
>> <float:upperlimit>"
>>
>> with <symbol:direction> being either "in" or "out"
>> with <symbol:type> being "control" or "audio"
>> with <symbol:name> being the name of the port (e.g. "Amplitude random
>> (%)")
>>
>> and lower/upperlimit define the valid range of the value.
>>
>> for controlling, you use "control <symbol:name> <float:value>"
>>
>> <symbol:name> is not case-sensitive, and it tries to find a simple match.
>> e.g. "Amplitude random (%)" can be controlled with "amp" or "AMPLItude"
>> or "Amplitude random (%)".
>> it will take the first port that matches, so if you have parameters
>> "FrequencyUpper" and "FrequencyLower", then "freq" will match
>> "FrequencyUpper", in order to control the other param you have to use at
>> least "frequencyl"
>>
> in the terminal 'analyseplugin' for svf reveals this:
>
> Plugin Name: "State Variable Filter"
> Plugin Label: "svf"
> Plugin Unique ID: 1214
> Maker: "Steve Harris <steve at plugin.org.uk>"
> Copyright: "GPL"
> Must Run Real-Time: No
> Has activate() Function: Yes
> Has deativate() Function: No
> Has run_adding() Function: Yes
> Environment: Normal or Hard Real-Time
> Ports:    "Input" input, audio, -1 to 1
>   "Output" output, audio, -1 to 1
>   "Filter type (0=none, 1=LP, 2=HP, 3=BP, 4=BR, 5=AP)" input, control, 0 to
> 5, default 0, integer
>   "Filter freq" input, control, 0 to 6000, default 440
>   "Filter Q" input, control, 0 to 1, default 0.25
>   "Filter resonance" input, control, 0 to 1, default 0
>
> I'm having trouble figuring out what exactly to send the plug
> I tried sending 'type' 'filter_type' filtertype' and other combinations for
> "Filter type" but it doesn't seem to like anything I try
>
> *error: plugin~: plugin doesn't have a control input port named "type"*
>
> ditto on 'Q' and 'resonance' although 'filter' seems to be accepted for
> "Filter_freq"
>
> can you point me to where in the code I might find out the correct syntax
> for a particular LADSPA plug?
>
>
> Hi Kim,

try:

[0\
|
[control #n $1(
|
[plugin~ svf]

where n is the number of the parameter (so #1 or #2 or #3 ..etc)

gr,
Tim



>
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