Inserting custom music in Road Rash CD

After researching a lot about the Sega CD PCM format Ive found some tools to convert standard 8-bit wav files into Sega CD 8-bit sign-magnitude PCM by bgvanbur.

I think some songs/bands on RRCD are pretty irritating. Then I inserted old mainstream grunge favorites by exchanging some of the .22K extension files (PCM files actually) found in the Road Rash CD media by newer ones.

However, these .22K files seems to play only in the menus and in the Jukebox but not in the actual gameplay.

I tried searching the whole CD image for PCM data beyond the .22K files and the video files, but I couldn't find anything.

The question is: where is the PCM data for the tracks? Why would it be other files than the .22K ones?

For the curious, I managed to insert the following songs in the menus:

Nirvana: Dive / Been a Son / Aneurysm
Pearl Jam: Go / Animal / Leash
Alice In Chains: We Die Young
Stone Temple Pilots: Sex Type Thing

I've always wondered this myself. Is it possible to do the same for the pcm tracks in Sonic CD? I always wanted to do a Chemical Bros. remix.

I think the PCM files in Sonic CD (SNCBNK*B.BIN) store just instruments and voice samples, not the fully pre-recorded songs.

I updated scdtools to convert Sega CD pcm raw data to wav (I know there are some pcm to wav utilities already out there, but I already had this implemented for some of the Sega CD video formats so it didn't take long to add in a simple pcmraw format to scdmoviedecode). Looking at the savestate for the title screen, the PCM FD value is 0x567 (21982 Hz).

Using the updated tools you can convert all the *.22K files using the following command:

Code:

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scdmoviedecode -pcmraw -pcmfd=0x567 -extractwav *.22K

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It also looks like the *.ALV files contain PCM data, but it is disjoint and has other information along with it. You would need to decipher the format of this file to hack any changes in.

That's great bgvanbur! I used another tool for converting SCD PCM into WAV. Repped!

At the same time It's sad that I can't go any further in my "project" to exchange the game tracks.

I guess the menus doesn't use the same playing method of the races to difficult hacking the songs.