About generate a signal every N seconds

shaw820

Hi, I want to use bela to generate a sound signal every N seconds, so I follow the lecture 9, and the IDE told me:

[warning] unused variable 'out' [-Wunused-variable] column: 11, line: 94
/root/Bela/projects/sound2/render.cpp:94:11: warning: unused variable 'out' [-Wunused-variable]
double out = 10.0fcos(2.0f (float)3.14159265358979323846 * gPhase);
^
1 warning generated.

My original code is generate a constant sound, as shown in the pic.
alt text

And here is my new code

alt text

please help me

ryjobil

Scoping problem. Variable "out" is being defined inside an "if" statement. Outside of the "if" statement it is out of scope (not retained in memory).

Immediately after

 void render(BelaContext *context, void *userData)
{
    double out = 0.0;
.
.
.
       //double out = 10.0f*cos(2.0f*(float)M_PI*gPhase);
      out = 10.0f*cos(2.0f*(float)M_PI*gPhase);
.
.
.
}

In the first example "out" was used within the same "if" statement in which the variable was instantiated so there was not a warning.