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Forum Index : Microcontroller and PC projects : Micromite RTTTL player using PWM

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Oldbitcollector

Senior Member

Joined: 16/05/2014
Location: United States
Posts: 172
Posted: 01:30pm 31 Aug 2014
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I've been working on a little RTTTL player.
This version isn't quite perfect, but it's fun to play with.

[code]
''RTTTL Player for Micromite using PWM pin. Pin 4.
''Name and Default values have been removed from the songs.
''By Jeff Ledger

''The Simpsons
SONG$ = "c.6,e6,f#6,8a6,g.6,e6,c6,8a,8f#,8f#,8f#,2g,8p,8p,8f#,8f#,8f #,8g,a#.,8c,8c6,8c6,c6"

''Entertainer
'SONG$="8d,8d#,8e,c6,8e,c6,8e,2c.6,8c6,8d6,8d#6,8e6,8c6,8d6, e6,8b,d6,2c6,p,8d,8d#,8e,c6,8e,c6,8e,2c.6,8p,8a,8g,8f#,8a,8c 6,e6,8d6,8c6,8a,2d6"

''Looney
'SONG$="32p,c6,8f6,8e6,8d6,8c6,a.,8c6,8f6,8e6,8d6,8d#6,e.6,8 e6,8e6,8c6,8d6,8c6,8e6,8c6,8d6,8a,8c6,8g,8a#,8a,8f"

''MASH
'SONG$="4a,4g,f#,g,p,f#,p,g,p,f#,p,2e.,p,f#,e,4f#,e,f#,p,e,p ,4d.,p,f#,4e,d,e,p,d,p,e,p,d,p,2c#.,p,d,c#,4d,c#,d,p,e,p,4f# ,p,a,p,4b,a,b,p,a,p,b,p,2a.,4p,a,b,a,4b,a,b,p,2a.,a,4f#,a,b, p,d6,p,4e.6,d6,b,p,a,p,2b"

''A-Team
'SONG$="4d#6,a#,2d#6,16p,g#,4a#,4d#.,p,16g,16a#,d#6,a#,f6,2d #6,16p,c#.6,16c6,16a#,g#.,2a#"

''Smurfs
'SONG$="4c#6,16p,4f#6,p,16c#6,p,8d#6,p,8b,p,4g#,16p,4c#6,p,1 6a#,p,8f#,p,8a#,p,4g#,4p,g#,p,a#,p,b,p,c6,p,4c#6,16p,4f#6,p, 16c#6,p,8d#6,p,8b,p,4g#,16p,4c#6,p,16a#,p,8b,p,8f,p,4f#"

'' RTTTL Player for Micromite
length=LEN(song$)
pointer=1
PRINT song$
songplay:

IF pointer > length THEN END
'' Process note duration
IF MID$(song$,pointer,2) = "32" THEN SETDUR 42,2
IF MID$(song$,pointer,2) = "16" THEN SETDUR 95,2
IF MID$(song$,pointer,1) = "8" THEN SETDUR 188,1
IF MID$(song$,pointer,1) = "4" THEN SETDUR 375,1
IF MID$(song$,pointer,1) = "2" THEN SETDUR 750,1
IF MID$(song$,pointer,1) = "1" THEN SETDUR 900,1

'' Process sharps
IF MID$(song$,pointer,2) = "a#" THEN SETNOTE 466.08,2
IF MID$(song$,pointer,2) = "c#" THEN SETNOTE 277.18,2
IF MID$(song$,pointer,2) = "d#" THEN SETNOTE 311.13,2
IF MID$(song$,pointer,2) = "f#" THEN SETNOTE 369.13,2
IF MID$(song$,pointer,2) = "g#" THEN SETNOTE 415.30,2

'' Process notes
IF MID$(song$,pointer,1) = "a" THEN SETNOTE 440,1
IF MID$(song$,pointer,1) = "b" THEN SETNOTE 493,1
IF MID$(song$,pointer,1) = "c" THEN SETNOTE 261.63,1
IF MID$(song$,pointer,1) = "d" THEN SETNOTE 293.66,1
IF MID$(song$,pointer,1) = "e" THEN SETNOTE 329.63,1
IF MID$(song$,pointer,1) = "f" THEN SETNOTE 349.23,1
IF MID$(song$,pointer,1) = "g" THEN SETNOTE 392,1
IF MID$(song$,pointer,1) = "p" THEN SETNOTE 0,1

IF MID$(song$,pointer,1) = "." THEN
notedur=notedur+128 : pointer=pointer+1
ENDIF

'' Process Octaves
oct=4
'IF MID$(song$,pointer,1) = "4" THEN SETOCTAVE 4,1
IF MID$(song$,pointer,1) = "5" THEN SETOCTAVE 5,1
IF MID$(song$,pointer,1) = "6" THEN SETOCTAVE 6,1
IF MID$(song$,pointer,1) = "7" THEN SETOCTAVE 7,1

IF MID$(song$,pointer,1) = "," THEN play (note,oct,notedur)
IF MID$(song$,pointer,1) = "." THEN pointer=pointer+1
GOTO songplay

SUB play (n,o,d)
IF o = 5 THEN n = n * 2
IF o = 6 THEN n = n * 4
IF o = 7 THEN n = n * 8
IF n > 0 THEN PWM 1,n,5
IF n = 0 THEN d = 5
PAUSE d
PWM 1,stop
pointer=pointer+1
END SUB

SUB SETDUR ndur,adv
notedur=ndur
pointer=pointer+adv
END SUB

SUB SETNOTE tone,adv
note=tone
pointer=pointer+adv
END SUB

SUB SETOCTAVE o,adv
oct=o
pointer=pointer+adv
END SUB
[/code]
My Propeller/Micromite mini-computer project.
 
Oldbitcollector

Senior Member

Joined: 16/05/2014
Location: United States
Posts: 172
Posted: 02:03pm 31 Aug 2014
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Update: found a small bug, change PAUSE d to PAUSE d+25 and it'll sound better.

jeff
My Propeller/Micromite mini-computer project.
 
Oldbitcollector

Senior Member

Joined: 16/05/2014
Location: United States
Posts: 172
Posted: 02:16pm 31 Aug 2014
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Found one more bug.. I think it's pretty close to right now for a quick hack.

Here's an update of the entire program:

[code]
''RTTTL Player for Micromite using PWM pin. Pin 4.
''Name and Default values have been removed from the songs.
''By Jeff Ledger

''The Simpsons
'SONG$ = "c.6,e6,f#6,8a6,g.6,e6,c6,8a,8f#,8f#,8f#,2g,8p,8p,8f#,8f#,8f #,8g,a#.,8c,8c6,8c6,c6"

''Entertainer
SONG$="8d,8d#,8e,c6,8e,c6,8e,2c.6,8c6,8d6,8d#6,8e6,8c6,8d6,e 6,8b,d6,2c6,p,8d,8d#,8e,c6,8e,c6,8e,2c.6,8p,8a,8g,8f#,8a,8c6 ,e6,8d6,8c6,8a,2d6"

''Looney
'SONG$="32p,c6,8f6,8e6,8d6,8c6,a.,8c6,8f6,8e6,8d6,8d#6,e.6,8 e6,8e6,8c6,8d6,8c6,8e6,8c6,8d6,8a,8c6,8g,8a#,8a,8f"

''MASH
'SONG$="4a,4g,f#,g,p,f#,p,g,p,f#,p,2e.,p,f#,e,4f#,e,f#,p,e,p ,4d.,p,f#,4e,d,e,p,d,p,e,p,d,p,2c#.,p,d,c#,4d,c#,d,p,e,p,4f# ,p,a,p,4b,a,b,p,a,p,b,p,2a.,4p,a,b,a,4b,a,b,p,2a.,a,4f#,a,b, p,d6,p,4e.6,d6,b,p,a,p,2b"

''A-Team
'SONG$="4d#6,a#,2d#6,16p,g#,4a#,4d#.,p,16g,16a#,d#6,a#,f6,2d #6,16p,c#.6,16c6,16a#,g#.,2a#"

''Smurfs
'SONG$="4c#6,16p,4f#6,p,16c#6,p,8d#6,p,8b,p,4g#,16p,4c#6,p,1 6a#,p,8f#,p,8a#,p,4g#,4p,g#,p,a#,p,b,p,c6,p,4c#6,16p,4f#6,p, 16c#6,p,8d#6,p,8b,p,4g#,16p,4c#6,p,16a#,p,8b,p,8f,p,4f#"

'' RTTTL Player for Micromite
song$=song$+","
length=LEN(song$)
pointer=1
PRINT song$
songplay:

IF pointer > length THEN END
'' Process note duration
IF MID$(song$,pointer,2) = "32" THEN SETDUR 42,2
IF MID$(song$,pointer,2) = "16" THEN SETDUR 95,2
IF MID$(song$,pointer,1) = "8" THEN SETDUR 188,1
IF MID$(song$,pointer,1) = "4" THEN SETDUR 375,1
IF MID$(song$,pointer,1) = "2" THEN SETDUR 750,1
IF MID$(song$,pointer,1) = "1" THEN SETDUR 900,1

'' Process sharps
IF MID$(song$,pointer,2) = "a#" THEN SETNOTE 466.08,2
IF MID$(song$,pointer,2) = "c#" THEN SETNOTE 277.18,2
IF MID$(song$,pointer,2) = "d#" THEN SETNOTE 311.13,2
IF MID$(song$,pointer,2) = "f#" THEN SETNOTE 369.13,2
IF MID$(song$,pointer,2) = "g#" THEN SETNOTE 415.30,2

'' Process notes
IF MID$(song$,pointer,1) = "a" THEN SETNOTE 440,1
IF MID$(song$,pointer,1) = "b" THEN SETNOTE 493,1
IF MID$(song$,pointer,1) = "c" THEN SETNOTE 261.63,1
IF MID$(song$,pointer,1) = "d" THEN SETNOTE 293.66,1
IF MID$(song$,pointer,1) = "e" THEN SETNOTE 329.63,1
IF MID$(song$,pointer,1) = "f" THEN SETNOTE 349.23,1
IF MID$(song$,pointer,1) = "g" THEN SETNOTE 392,1
IF MID$(song$,pointer,1) = "p" THEN SETNOTE 0,1

IF MID$(song$,pointer,1) = "." THEN
notedur=notedur+128 : pointer=pointer+1
ENDIF

'' Process Octaves
oct=4
IF MID$(song$,pointer,1) = "5" THEN SETOCTAVE 5,1
IF MID$(song$,pointer,1) = "6" THEN SETOCTAVE 6,1
IF MID$(song$,pointer,1) = "7" THEN SETOCTAVE 7,1

IF MID$(song$,pointer,1) = "," THEN play (note,oct,notedur)
IF MID$(song$,pointer,1) = "." THEN pointer=pointer+1
GOTO songplay

SUB play (n,o,d)
IF o = 5 THEN n = n * 2
IF o = 6 THEN n = n * 4
IF o = 7 THEN n = n * 8
IF n > 0 THEN PWM 1,n,5
IF n = 0 THEN d = 5
PAUSE d +25
PWM 1,stop
pointer=pointer+1
END SUB

SUB SETDUR ndur,adv
notedur=ndur
pointer=pointer+adv
END SUB

SUB SETNOTE tone,adv
note=tone
pointer=pointer+adv
END SUB

SUB SETOCTAVE o,adv
oct=o
pointer=pointer+adv
END SUB
[/code]
My Propeller/Micromite mini-computer project.
 
hitsware
Guru

Joined: 23/11/2012
Location: United States
Posts: 535
Posted: 02:51pm 31 Aug 2014
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Neato ! ..... I'm experimenting with PWM music also .

Today I was able to add COM1 for percussion !
Do you use any external circuitry ?
I would guess not if you want it to run on a phone.
I think maybe MIDI can be used though ?
 
Oldbitcollector

Senior Member

Joined: 16/05/2014
Location: United States
Posts: 172
Posted: 04:09pm 31 Aug 2014
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I'm running it on an audio circuit that looks like this..





Then into a set PC speakers..
Edited by Oldbitcollector 2014-09-02
My Propeller/Micromite mini-computer project.
 
OA47

Guru

Joined: 11/04/2012
Location: Australia
Posts: 1000
Posted: 04:27pm 31 Aug 2014
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Dropbox Screen
The link without the two spaces
 
hitsware
Guru

Joined: 23/11/2012
Location: United States
Posts: 535
Posted: 09:33am 01 Sep 2014
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''''''''' Serial Com Drum Selector
' Sum Com pin with PWM pin for crude percussion
'''' left right arrows for coarse adjust
'''''' up down arrows for fine adjust
a=2: b=10
Do
If KeyDown=131 Then a=a+1
If KeyDown=130 Then a=a-1
If KeyDown= 128 Then b=b+1
If KeyDown= 129 Then b=b-1
If a<1 Then a=1
If a>6 Then a=6
If b<0 Then b=0
If b>255 Then b=255
On a GoSub A,B,C,D,E,F
Print#1, Chr$(b);
Pause 350: Cls: Close #1
Loop
A: Open"com1:300" As #1
Print " com1:300"; " chr$ =" b
Return
B: Open"com1:600" As #1
Print" com1:600"; " chr$ =" b
Return
C: Open"com1:1200" As #1
Print " com1:1200"; " chr$ =" b
Return
D: Open"com1:2400" As #1
Print" com1:2400"; " chr$ =" b
Return
E: Open"com1:4800" As #1
Print" com1:4800"; " chr$ =" b
Return
F: Open"com1:9600" As #1
Print" com1:9600"; " chr$ =" b
Return
 
WhiteWizzard
Guru

Joined: 05/04/2013
Location: United Kingdom
Posts: 2948
Posted: 10:00am 01 Sep 2014
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Hi Jeff,

I like!

Is anyone else playing with a RTTTL player?

The only thing I am not 100% sure about is the '. half-note' feature. You are simply adding 128 to the duration - but is that 100% correct?

Nice demo tunes . . . . .

WW
 
peterv
Newbie

Joined: 19/04/2012
Location: Australia
Posts: 3
Posted: 11:07pm 24 Feb 2015
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Hi

Haven't posted here much but I have a project to create a kitchen timer.

I saw Jeff's RTTTL code and thought that could be handy so have been playing with it. I'm going to have the kitchen timer play a random tune when the time is up..just for fun

Anyway here is the program I created to help me test and develop the RTTTL part of my project. I have taken Jeff's code a bit further using a few case statements and making sure it would play a full RTTTL string.

I'm not totally happy with how it plays re beats per minute but it is close enough for my purposes. If anyone has any suggestions for improvement I'm all ears.
2015-02-25_090603_MELODY2.zip
 
peterv
Newbie

Joined: 19/04/2012
Location: Australia
Posts: 3
Posted: 11:22pm 24 Feb 2015
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Hi

I should also have answered WW's question since I've now done a fair bit of research on RTTTL. Although this thread is a bit out of date now.

A dot does mean half the duration of a note is added.

In Jeff's code adding 128 is about right but that is because he stayed with a standard beats per minute.

However the RTTTL code allows you to specify the beats per minute and this means when a '.' is seen then whatever the duration of that particular note is there should be half a note added. Example if a note duration was 2 which stands for half of a whole note then the duration of dotted 2 is 2 + 4 because 4 stands for quarter of a whole note.

If you look at the code in my melody2.bas program then the adjust_for_dotting function is where this is accounted for.

HTH
 
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