# Make your first browser synthesizer

> Explore oscillator frequency, level and filtering with a playable sine-wave instrument template.

Source: https://docs.tune.toys/guides/first-synth/ (updated 2026-11-01)

**Template:** Little Sine. **You will learn:** oscillator frequency and level, and a low-pass tone control.

1. Open Little Sine and preview its continuous oscillator at a comfortable listening level.
2. Change Frequency to hear how oscillator rate controls pitch.
3. Change Level to compare amplitude without changing frequency.
4. Lower Tone to explore the low-pass filter after the oscillator.
5. Create your own copy and inspect the oscillator and filter in Patch. Exposed parameters connect them to the Frame controls.
6. Save the Toy, then publish a playable page when you are ready to share it. This example is a continuous sound source, not a note-triggered keyboard instrument.

For the nodes involved, see [Oscillator](https://docs.tune.toys/nodes/std.oscillator/) and [Low-pass filter](https://docs.tune.toys/nodes/std.lowpass/).