play - Anobium/Great-Cow-BASIC-Help GitHub Wiki
Syntax:
Play SoundPlayDataString
You must specify the following include and the port of the sound device.
#include <songplay.h>
#define SOUNDOUT PORTN.N
Command Availability:: Available on all microcontrollers.
Explanation: This command will plays a QBASIC sequence of notes. The SoundPlayDataString is a string representing a musical note or notes to play where Notes are A to G.
| Command | Description |
|---|---|
| A - G | May be followed by length: 2 = half note, 4 = quarter, also may be followed by # or + (sharp) or - (flat). |
| On | Sets current octave. n is octave from 0 to 6 |
| Pn | Pause playing. n is length of rest |
| Ln: | Set default note length. n = 1 to 8. |
| < or > | Change down or up an octave |
| Tn: | Sets tempo in L4s/minute. n = 32 to 255, default 120. |
| Nn | Play note n. n = 0 to 84, 0 = rest. |
Unsupported QBASIC commands are
| Command | Description |
|---|---|
| M | Play mode |
| . | Changes note length |
For more information on the QBASIC PLAY command set, see https://en.wikibooks.org/wiki/QBasic/Appendix
Example:
'Sample program to play a string
'on PORTB bit 1.
#chip 16F877A, 20
#include <songplay.h>
#define SoundOut PORTB.1
play "C C# C C#"
For more help, see Sound Overview