Signal generator
The signal generator “scope” produces commonly used signals for system measurement.
Routing
The signal has two output channels. Usually, one loops back directly into the audio interface and serves as the reference. The other one goes to the system we want to measure. Note that the exact same signal is sent to both outputs. The output channels settings are in the IO setup menu.
Important
It is also possible to use a “software loopback” instead of a “hardware loopback” by clicking on the 
button in the system setup scope.
Controls
| Name | Description |
|---|---|
| Type |  Sets the signal type to generate. Pink noise Pink noise is a random signal with an amplitude falloff inversely proportional to frequency. This is the most commonly employed variety noise in audio measurement, as it is a constant-energy perceived content. White noise White noise is a random signal with constant energy across the audio range. Compared to pink noise, it sounds much brighter as it has more energy in high-frequencies. Commonly employed for electronic apparatus measurements. Sine Fixed-frequency, pure tone generator. Sweep Generates a variable tone from start to end frequencies. It is a Log. sweep, as it is best suited for audio measurements due to its constant time per octave. |
| Level | Output level of the waveform, expressed in dB RMS. |
| Enable | Toggles signal generator output on and off. |
Settings
Feed input reference
| Name | Description |
|---|---|
| Feed input reference | Fed the reference input (default input 1) with the signal generator. |
| Sine frequency | Sets the frequency of the sine generator, only applicable when the signal type is set to Sine. |
| Sweep start/end frequencies | Sets the range of frequencies to sweep. 1 |
| Sweep length | Sets the overall duration of the sweep in seconds, i.e. the time taken to go from start to end frequency. |
| Level | Generator output level in dB RMS. |
Reverse start and end frequencies to obtain reverse sweep.↩︎