I have a GNU Radio Companion flow graph, where I have the following connections:
- 440Hz cosine wave
- throttle block
- audio sink
All of the above blocks use the same sample rate (48KHz).
When I execute this flow graph, I don't get a continuous note, the way I expected. Instead, it pulses on and off, several times per second. Why is this?
How can I make it output a continuous 440Hz tone?
Removing the Throttle block makes it stop cutting in and out, but it sounds even worse when I do this.
I have tried this setup, with and without the Throttle block, at all common sample rates for sound cards.