# Switching Synths

So far we’ve had quite a lot of fun making beeps. However, you’re probably starting to get bored of the basic beep noise. Is that all Sonic Pi has to offer? Surely there’s more to live coding than just playing beeps? Yes there is, and in this section we’ll explore some of the exciting range of sounds that Sonic Pi has to offer.

## Synths

Sonic Pi has a number of different instruments it calls synths (which is short for synthesisers). Whereas samples represent pre-recorded sounds, synths are capable of generating new sounds depending on how you control them (which we’ll explore later in this tutorial). Sonic Pi’s synths are very powerful and expressive and you’ll have a lot of fun exploring and playing with them. First, let’s learn how to select the current synth to use.

## Buzzy saws and prophets

A fun sound is the saw wave - let’s give it a try:

    use_synth :saw
    play 38
    sleep 0.25
    play 50
    sleep 0.25
    play 62

Let’s try another sound - the prophet:

    use_synth :prophet
    play 38
    sleep 0.25
    play 50
    sleep 0.25
    play 62

How about combining two sounds. First one after another:

    use_synth :saw
    play 38
    sleep 0.25
    play 50
    sleep 0.25
    use_synth :prophet
    play 57

Now multiple sounds at the same time (by not sleeping between successive calls to `play`):

    use_synth :tb303
    play 38
    use_synth :dsaw
    play 50
    use_synth :prophet
    play 57

Notice that the `use_synth` command only affects the following calls to `play`. Think of it like a big switch - new calls to `play` will play whatever synth it’s currently pointing to. You can move the switch to a new synth with `use_synth`.

## Discovering Synths

To see which synths Sonic Pi has for you to play with take a look at the Synths option in the menu at the bottom of this help screen (between Examples & Fx). There are over 20 to choose from. Here are a few of my favourites:

`:prophet` `:dsaw` `:fm` `:tb303` `:pulse`

Now play around with switching synths during your music. Have fun combining synths to make new sounds as well as using different synths for different sections of your music.