|`AUDIO_PIN` | *Not defined* |Configures the pin that the speaker is connected to. |
|`AUDIO_PIN_ALT` | *Not defined* |Configures the pin for a second speaker or second pin connected to one speaker.|
|`AUDIO_PIN_ALT_AS_NEGATIVE` | *Not defined* |Enables support for one speaker connected to two pins. |
|`AUDIO_INIT_DELAY` | *Not defined* |Enables delay during startup song to accomidate for USB startup issues. |
|`AUDIO_ENABLE_TONE_MULTIPLEXING` | *Not defined* |Enables time splicing/multiplexing to create multiple tones simutaneously. |
|`STARTUP_SONG` | `STARTUP_SOUND` |Plays when the keyboard starts up (audio.c) |
|`GOODBYE_SONG` | `GOODBYE_SOUND` |Plays when you press the QK_BOOT key (quantum.c) |
|`AG_NORM_SONG` | `AG_NORM_SOUND` |Plays when you press AG_NORM (process_magic.c) |
|`AG_SWAP_SONG` | `AG_SWAP_SOUND` |Plays when you press AG_SWAP (process_magic.c) |
|`CG_NORM_SONG` | `AG_NORM_SOUND` |Plays when you press CG_NORM (process_magic.c) |
|`CG_SWAP_SONG` | `AG_SWAP_SOUND` |Plays when you press CG_SWAP (process_magic.c) |
|`MUSIC_ON_SONG` | `MUSIC_ON_SOUND` |Plays when music mode is activated (process_music.c) |
|`MUSIC_OFF_SONG` | `MUSIC_OFF_SOUND` |Plays when music mode is deactivated (process_music.c) |
|`MIDI_ON_SONG` | `MUSIC_ON_SOUND` |Plays when midi mode is activated (process_music.c) |
|`MIDI_OFF_SONG` | `MUSIC_OFF_SOUND` |Plays when midi mode is deactivated (process_music.c) |
|`CHROMATIC_SONG` | `CHROMATIC_SOUND` |Plays when the chromatic music mode is selected (process_music.c) |
|`GUITAR_SONG` | `GUITAR_SOUND` |Plays when the guitar music mode is selected (process_music.c) |
|`VIOLIN_SONG` | `VIOLIN_SOUND` |Plays when the violin music mode is selected (process_music.c) |
|`MAJOR_SONG` | `MAJOR_SOUND` |Plays when the major music mode is selected (process_music.c) |
|`DEFAULT_LAYER_SONGS` | *Not defined* |Plays song when switched default layers with [`set_single_persistent_default_layer(layer)`](ref_functions.md#setting-the-persistent-default-layer)(quantum.c) |
|`SENDSTRING_BELL` | *Not defined* |Plays chime when the "enter" ("\a") character is sent (send_string.c) |
|`AUDIO_PIN` | *Not defined* |Configures the pin that the speaker is connected to. |
|`AUDIO_PIN_ALT` | *Not defined* |Configures the pin for a second speaker or second pin connected to one speaker. |
|`AUDIO_PIN_ALT_AS_NEGATIVE` | *Not defined* |Enables support for one speaker connected to two pins. |
|`AUDIO_INIT_DELAY` | *Not defined* |Enables delay during startup song to accomidate for USB startup issues. |
|`AUDIO_ENABLE_TONE_MULTIPLEXING` | *Not defined* |Enables time splicing/multiplexing to create multiple tones simutaneously. |
|`AUDIO_POWER_CONTROL_PIN` | *Not defined* |Enables power control code to enable or cut off power to speaker (such as with PAM8302 amp). |
|`AUDIO_POWER_CONTROL_PIN_ON_STATE`| `1` |The state of the audio power control pin when audio is "on" - `1` for high, `0` for low. |
|`STARTUP_SONG` | `STARTUP_SOUND` |Plays when the keyboard starts up (audio.c) |
|`GOODBYE_SONG` | `GOODBYE_SOUND` |Plays when you press the QK_BOOT key (quantum.c) |
|`AG_NORM_SONG` | `AG_NORM_SOUND` |Plays when you press AG_NORM (process_magic.c) |
|`AG_SWAP_SONG` | `AG_SWAP_SOUND` |Plays when you press AG_SWAP (process_magic.c) |
|`CG_NORM_SONG` | `AG_NORM_SOUND` |Plays when you press CG_NORM (process_magic.c) |
|`CG_SWAP_SONG` | `AG_SWAP_SOUND` |Plays when you press CG_SWAP (process_magic.c) |
|`MUSIC_ON_SONG` | `MUSIC_ON_SOUND` |Plays when music mode is activated (process_music.c) |
|`MUSIC_OFF_SONG` | `MUSIC_OFF_SOUND` |Plays when music mode is deactivated (process_music.c) |
|`MIDI_ON_SONG` | `MUSIC_ON_SOUND` |Plays when midi mode is activated (process_music.c) |
|`MIDI_OFF_SONG` | `MUSIC_OFF_SOUND` |Plays when midi mode is deactivated (process_music.c) |
|`CHROMATIC_SONG` | `CHROMATIC_SOUND` |Plays when the chromatic music mode is selected (process_music.c) |
|`GUITAR_SONG` | `GUITAR_SOUND` |Plays when the guitar music mode is selected (process_music.c) |
|`VIOLIN_SONG` | `VIOLIN_SOUND` |Plays when the violin music mode is selected (process_music.c) |
|`MAJOR_SONG` | `MAJOR_SOUND` |Plays when the major music mode is selected (process_music.c) |
|`DEFAULT_LAYER_SONGS` | *Not defined* |Plays song when switched default layers with [`set_single_persistent_default_layer(layer)`](ref_functions.md#setting-the-persistent-default-layer)(quantum.c). |
|`SENDSTRING_BELL` | *Not defined* |Plays chime when the "enter" ("\a") character is sent (send_string.c) |
## Tempo
the 'speed' at which SONGs are played is dictated by the set Tempo, which is measured in beats-per-minute. Note lengths are defined relative to that.