vectrex sound "programming"

[Malban]

Last post for today...

Here are the sources promised.
First the original SongDemo.from Chris (songdemo.as9 - see below)

Secondly my edited and commented version (Chris's comments were a bit sparse) (songdemo.asm - see below)

And thirdly the original documentation of Chris (playvoic.txt - see below)


Regards

Chris (S)

Attachments:

SONGDEMO.AS9 (16.13 KB)

SONGDEMO.ASM (30.45 KB)

PLAYVOIC.TXT (9.03 KB)

[g0blinish]

vecsound doesn't work with .YM

[christophertumber]

Aug 14, 2014 9:16:00 GMT -5 g0blinish said:

vecsound doesn't work with .YM

You'll need to be more specific in order for anyone to help you.

- What are you doing exactly (step by step)?
- Where is it failing, what error message are you getting, or what unexpected output?

[gauze]

So to bump this, How do you play background music and have sound effects play simultaneously? I know you have 3 channels + 1 noise channel you can use but how can you use them separately basically? Any demos w/ source out there?

[christophertumber]

Well, there's several approaches:

- Only use one of music or soundfx.
- Dedicate two channels to music and one channel to soundfx.
- Use all three channels for music, but when a soundfx needs to be played take over one of the channels.

[gauze]

I meant specifically with YM files which as far as I can tell use all channels even if some are empty in the tracker. Maybe my question is nonsensical.

I'm going to meditate on this a bit more.

[binarystar]

I did this in Nagoya Attack. IIRC, I used 2 channels then ANDed the mixer byte and did the sfx on the 3rd channel. Can't really remember to be honest but it wasn't hard to pull off.

[scotthuggins]

Goodness, I get stuck (sometimes) on the most (seemingly) remedial tasks. In my game I am playing a melody, using all three sound voices on the Veccy. When the player's ship explodes, I wanna STOP all music - no sound at all.

I thought this would do it (Christopher, btw, your tutorial is excellent in this thread).

I as hoping to clear register values, but I cannot get anywhere.

Here's what I am trying to do to stop the sounds in the game. What ends up happening (no matter what) is the LAST note being played when player's ship explodes plays on and on and on - forever. Hopefully, I have given enough information. Any thoughts / suggestions?

lda #$08 ;Modify Register 8, which is volume for voice #1
ldb #00 ;Volume=00 -- trying to clear it out
jsr $f256 ; byte_2_sound_chip ;Set register
lda #$09 ;Modify Register 9, which is volume for voice #2
ldb #00 ;Volume=00 -- trying to clear it out
jsr $f256 ; byte_2_sound_chip ;Set register
lda #$0A ;Modify Register 10, which is volume for voice #3
ldb #00 ;Volume=00 -- trying to clear it out
jsr $f256 ; byte_2_sound_chip ;Set register

[la1n]

Jun 10, 2014 16:03:41 GMT -5 vectrexrc said:

Ok Finished my player code for AYFX Editor AFX files

sourcecode available for download here:

www.facebook.com/groups/104852679725118/225487924328259/

bin file here:

www.facebook.com/groups/104852679725118/225488184328233/

to convert the afx files (or any bin file) to assembler fcb data statements) you will need to use bin2asm:

www.facebook.com/groups/104852679725118/220011651542553/

hi there,

at the moment on creating effects for my new shootemup vectrex game #vecZ. is your tool also somewhere = not facebook available? thanks for any hint. 

la1n

[mikiex]

Dec 31, 2015 14:43:31 GMT -5 la1n said:

Jun 10, 2014 16:03:41 GMT -5 vectrexrc said:

Ok Finished my player code for AYFX Editor AFX files

sourcecode available for download here:

www.facebook.com/groups/104852679725118/225487924328259/

bin file here:

www.facebook.com/groups/104852679725118/225488184328233/

to convert the afx files (or any bin file) to assembler fcb data statements) you will need to use bin2asm:

www.facebook.com/groups/104852679725118/220011651542553/

hi there,

at the moment on creating effects for my new shootemup vectrex game #vecZ. is your tool also somewhere = not facebook available? thanks for any hint. 

la1n


Ok as nobody else is answering I just downloaded them to dropbox to share, note do not right click to save you need to left click on the link www.dropbox.com/s/eukhitp9okwtbd4/AXFX_Player_By_Richard_Chadd.zip?dl=0

[la1n]

thanks for publishing it. i will try to use in my shootemup as soon as possible.

thanks again.

la1n

[la1n]

hi again,

i could implement the whole thing and it works (sfx_doframe). but my problem is now, that the old / classic soundroutine for music is not working anymore. is not the music running default on channel 1 and sfx in channel3?

here my code.

// sfx_code
ldx #sfx4 ; play
stx sfx_pointer
lda #$01
sta sfx_status

// every frame
lda sfx_status ; check if sfx to play
beq nofxtodo
jsr sfx_doframe

nofxtodo:
// classic music
lda #1 ; one means, we are about to
sta Vec_Music_Flag ; store it in appropriate RAM
jsr DP_to_C8 ; DP to RAM
ldu #music8 ; get some music, here music1
jsr Init_Music_chk ; and init new notes

// every frame
jsr Do_Sound

thanks for any help.

till soon

la1n

[la1n]

(and first pictures from the game vecZ you find here:
twitter.com/search?q=vecz%20vectrex&src=typd
emulator screenshots)

[Malban]

Hi,

I recently found a very good copy of a AY-3-8910 Datasheet,
I haven't had access to such a thorough and in depth description with examples and all ... befor.

I don't know if it official or someone enhanced it, but for information about PSG it is superb:

AY-3-8910/8912 PROGRAMMABLE SOUND GENERATOR DATA MANUAL READ IT, if interested in Vectrex sound!


Other resources which explains ADRS quite well:
Wikiaudio, Sound theory - Envelope, ADSR | PCB Design

Regards

Malban

[mountaingoat]

Very nice doc, has some real sound effect examples. Also much more readable than the original scan of the datasheet.

I just wish they used hex numbers instead of octals, always get confused when they talk about registers 07 and then 10 :-)