controlling synth

[cproud]

hi there,
i'm using dictionary for handling my variables and arguments. the question now is how can I change the parameters with Synth using the keys in the dictionaries. Maybe easier explained in an example:
d = Dictionary.new;
d.put("cfreq", 90);
(SynthDef("name", {var instr;
instr = SinOsc.ar(d.at("cfreq"));
Out.ar(0, instr);
}).send(s)
)
y = Synth("name", [d.at("cfreq", 900)])
is obviously wrong, before i had my variables in the dictionary i changed it with the backslash, but i cant seem to work out how it works now,
thanx for any help or hints

[dewdrop_world]

The only way to get new values into a running Synth is using a Control input. Controls are automatically created from arguments of the SynthDef function.

The code you posted looks of the value of d.at("name") once when building the SynthDef. After that, it's hard coded and can't be changed (without rebuilding the SynthDef).

I'd suggest, keep the dictionary on the client side and send the new value as needed using .set --

Code:

d = Dictionary.new;
d.put("cfreq", 90);
(SynthDef("name", { |cfreq = 440|
   var instr;
   instr = SinOsc.ar(freq);
   Out.ar(0, instr);
}).send(s)
)

y = Synth("name", [\cfreq, d.at("cfreq")]);

d["cfreq"] = 900;
y.set("cfreq", d["cfreq"]);

hjh