I figured it out! by iteachvader at 6:32 PM EDT on April 17, 2015
It's actually somewhat simple, but odd the way it works. With Cube Media Player, import the entire PS2 Namco Museum .ISO as interleaved ADPCM audio at 22,050 Hz with an interleave of 2048. Export it as a .WAV, and it'll give you one half of the audio. Then import data0.blt by itself into Cube Media Player with the same settings, export as .WAV, and it'll give you the other half of the audio. Import both into Audacity and you can line them up by the sample. Voila!
I did it with the PS2 version, but the XBOX version was painfully easy. I just imported data0.blt into Audacity as a signed 16-bit PCM, no endian, 2 channels, 22,050 Hz sample rate. Instant music. IMPORTANT! The XBOX version's music doesn't dip between clear audio and muffled high frequencies like the PS2 version's. Choose the XBOX version over any others.
Happy listening!
edited 2:46 PM EDT April 18, 2015
Almost forgot! by iteachvader at 7:26 AM EDT on April 22, 2015
Here is the music, tucked away neatly inside .ZIP files. The music itself is in a nice, lossless .WAV format.
GameCube version by iteachvader at 1:06 PM EDT on June 28, 2015
I managed to rip the music from the GameCube version recently. The start/end points of each song was originally unknown, but I found a way to figure it out. The GameCube version's music has a sample rate of 48000, so the audio's pretty crisp and clear.
Thank you so much by fred30w at 10:43 PM EDT on August 9, 2016
After all of this time, I decided to listen to the popping version I've had since I created this thread, and now I can enjoy the crisp, clean versions. Thank you very much for uploading those!