Basic Amos Issues

[lordofchaos]

Ok, amended. Program now runs, loads song and plays directly after.

[Mrs Beanbag]

does it stop when you press a key without crashing?

[lordofchaos]

Yes, song stops but doesn't crash. If I run the program directly afterwards I get "error opening med library" despite erasing the banks before running.

[Mrs Beanbag]

right you probably need to free the player, try a "lib call (1,-36)"

otherwise, we're cooking on gas.

now you can do

track load "music.med",5
ppsave "music.pp",5,4

and replace the track load with a pp load in the player.

[lordofchaos]

Ok, I`m taking it you mean to amend the program with "lib call (1,-36)"? I changed it and ran program again with same "error opening med.library"

[Mrs Beanbag]

put it at the end of the program. also, do it now from immediate mode.

for future reference here are all the library function offsets from the Music extension source code

_MEDGetPlayer		equ	-30
_MEDFreePlayer		equ	-36
_MEDPlayModule		equ	-42
_MEDContModule		equ	-48
_MEDStopPlayer		equ	-54
_MEDDimOffPlayer	equ	-60
_MEDSetTempo		equ	-66
_MEDLoadModule		equ	-72
_MEDUnLoadModule	equ	-78
_MEDGetCurrentModule	equ	-84
_MEDResetMIDI		equ	-90
_MEDSetModnum		equ	-96
_MEDRelocModule		equ	-102

[lordofchaos]

Originally Posted by Mrs Beanbag

put it at the end of the program. also, do it now from immediate mode.

for future reference here are all the library function offsets from the Music extension source code

_MEDGetPlayer        equ    -30
_MEDFreePlayer        equ    -36
_MEDPlayModule        equ    -42
_MEDContModule        equ    -48
_MEDStopPlayer        equ    -54
_MEDDimOffPlayer    equ    -60
_MEDSetTempo        equ    -66
_MEDLoadModule        equ    -72
_MEDUnLoadModule    equ    -78
_MEDGetCurrentModule    equ    -84
_MEDResetMIDI        equ    -90
_MEDSetModnum        equ    -96
_MEDRelocModule        equ    -102

Ok amended. Song plays after repeated loading.. Now time to pack again.. Thanks for your help and time, should be able to get things moving along now.

[lordofchaos]

So close but no cigar The player does load the packed tune but nothing can be heard, it doesn't throw up any errors, only silence. Bank 5 shows "tracker".

The code for the player shown on snapshot.

[Mrs Beanbag]

hmm... and you didn't play the tune before packing it? it should have just been freshly loaded into the bank because i think the relocate function must change it in some way.

[lordofchaos]

The tune does play after being loaded in, after the wait key instruction AMOS then packs it/saves to disk. This is code for packing >

[Mrs Beanbag]

yes you are loading the music with "track load" first, then you are playing it, which will CHANGE it, then packing it at the end. And it is packing the version that has already been relocated into some other area of memory, so it's not all there.

Just do track load IMMEDIATELY followed by ppsave.

[lordofchaos]

Eureka! A stupid mistake on my part! Ok the song is now packing correctly and playing back in the player correctly!

Thank you

I`m sure this thread/info will prove useful to others too.

[Mrs Beanbag]

hoorah! so what is the compression ratio like after all that?

[lordofchaos]

Originally Posted by Mrs Beanbag

hoorah! so what is the compression ratio like after all that?

Pretty impressive

140880 Compressed
237260 Original

[Lonewolf10]

Yeah, that's the kinda compression I like

[lordofchaos]

Originally Posted by Lonewolf10

Yeah, that's the kinda compression I like

Yes, I didn't think the compression would be that good, for my second music disc I shall include a lot more tunes/gfx...

I have uploaded the completed disc in the zone, self booting and should run on A500+ upwards. Thanks to everybody that helped me out!