I'm just getting started with Teensy and i've tried some very simple things, I created an oscillator(waveform->saw) but i can't control the volume of it, or at least i can't tell any difference when i change the values from the mixer or from the osc. Please find attached a picture of teensy. I have an audio output connected to the dac output and ground.

Any help or tips to get started to produce proper output will be great!
Note: i know about the audio shield, but i can't buy one in my country, it will take a while before arrives if i order it online.

Here is the code:

#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <SerialFlash.h>

// GUItool: begin automatically generated code
AudioSynthWaveform       waveform1;      //xy=251,461
AudioMixer4              mixer1;         //xy=468,472
AudioOutputAnalog        dac1;           //xy=642,496
AudioConnection          patchCord1(waveform1, 0, mixer1, 0);
AudioConnection          patchCord2(mixer1, dac1);
// GUItool: end automatically generated code

void setup() {
  // put your setup code here, to run once:


void loop() {
  // put your main code here, to run repeatedly:

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