Extract sound effects from existing ROMs

[+Al_Nafuur]

Is there an easy way or tool (Stella?) to extract or analyze what a ROM is doing to the TIA audio registers?

[+SpiceWare]

Have you looked at the Audio tab in Stella's Debugger? 

 

You can also the trapwrite command in the prompt to stop execution when audio registers are updated.

 

[+Al_Nafuur]

2 hours ago, SpiceWare said:

Have you looked at the Audio tab in Stella's Debugger? 

That doesn't really work with sounds that only happen on user interaction in the ROM.

 

2 hours ago, SpiceWare said:

 

You can also the trapwrite command in the prompt to stop execution when audio registers are updated.

 

I don't want to stop the ROM execution when the audio registers are updated. I want to "record" the sounds. With trapwrite recording would be possible, but very laborious.

[+SpiceWare]

Your post asked "extract or analyze".  I was covering the latter.

 

You can control user interaction using the IO tab.  Toggle the directions and/or fire,  then keep hitting FRAME+ to see the results a frame at a time.

 

 

I've done this in the past to get sound effect data, such as the pickup sound from Adventure that I used in my Collect tutorial. To do that I started game variation 1, positioned directly below the key for the gold castle, then entered the debugger.  I then checked the UP direction, as seen above, switched to the Audio tab, then repeated hit FRAME+ and copied the values that appeared on the audio tab into Collect's source code.

[+Al_Nafuur]

3 hours ago, SpiceWare said:

Your post asked "extract or analyze".  I was covering the latter.

 

You can control user interaction using the IO tab.  Toggle the directions and/or fire,  then keep hitting FRAME+ to see the results a frame at a time.

 

 

I've done this in the past to get sound effect data, such as the pickup sound from Adventure that I used in my Collect tutorial. To do that I started game variation 1, positioned directly below the key for the gold castle, then entered the debugger.  I then checked the UP direction, as seen above, switched to the Audio tab, then repeated hit FRAME+ and copied the values that appeared on the audio tab into Collect's source code.

? Thanks.

Setting the joystick in the IO tab did the trick!

[+stephena]

Since Stella is using SDL behind the scenes, you can also set the environment variable SDL_AUDIODRIVER=disk, which will output all audio to a file named sdlaudio.raw.  From there, you can extract it however you like.