MML-Parser

A tiny MML(Music Macro Language) parser (device-independent) and M5Stack/M5StickC audio player.

https://www.youtube.com/watch?v=N5gfNE_dzz8

// Mozart Piano Concerto No.23 Movement 2
const char* music = "T96 KIf+ L8 @0"
	"O5 c.d16ccfa a<b>gr<b4^ 16a16>f4^8<g>d <f4L32e+fgfL8e+rr"
	"O5 d.e=16d16.d32e32f.e16d <b+4.>crr L16c<b=a+b=a+b=>a=gfe+dc L8<b4a+a=rr"
	"O4 g=.a16g=g=4g= g=b>dg=b>d <<f.g+16fa4g f4r"
	"@48 [O4 a4.^8gf e+fg:c4. >c4.^8<bagabe+4.]2 >dc<b^ 8>c<a4Q4bgQ8f4rr4r";

MML Syntax

Symbol	Function	Description
A - G	note on	C(C4) D4.(D4+8) C12C12C12(triplets)
+ or #	sharp
-	flat
=	natural
R	rest	R1 (whole rest)
O	octave	O0 ... O8 (O4 default)
> <	octave up/down
L	length	L4 default
Q	note off ratio	n/8 (Q8 default)
^	tie	C4^16
&	no note off
T	tempo	T120 default
V	volume	V0 ... V127(max) V+10 V-10
KJ KI	transpose(maJor /mInor)	KJg(G major)
[ ]	loop	[...]4 (repeat 4 times)
:	skip on the last loop
@	program change
/*...*/	comment

Audio Player (M5Stack/M5StickC+SPK HAT)

• 8bit wave data (Java converter .wav -> .h)
• Tone sound for MML play.
• Max 15 channel mixer. (using esp_timer)

Dependent libraries (M5Stack)

• M5Stack-SD-Updater