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Author Topic: SEGA CD PicoDrive distorted music playback?  (Read 5234 times)

turboboy512 (OP)

  • Posts: 6
SEGA CD PicoDrive distorted music playback?
« on: October 25, 2015, 01:46:04 pm »
After struggling a lot with converting all the .APE files to .MP3 files, and then .WAV files, with a .CUE file for it to find all these files, I finally got a SEGA CD game working with music. But the problem is, the music just doesn't sound right. While all the files play fine on my PC, even on my emulator on there, they don't on my GCW Zero. In particular, they sound like they suffer from bit crushing. Is this a known issue of PicoDrive, is it an issue with my WAV files playing, or is it some other issue?

By the way, to be specific:
I'm using PicoDrive v1.91.
My game is Sonic CD. The Europe version, to be specific.
I'm running the game on the correct setting, the PAL one, with the correct BIOS.
And my WAV files are 16-bit, stereo, and at a rate of 44100hz.

Any ideas?
P.S. Also, by the way, it's very interesting getting to play this game...I've never played Sonic CD before.
« Last Edit: October 25, 2015, 01:48:30 pm by turboboy512 »
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David Knight

  • Posts: 577
Re: SEGA CD PicoDrive distorted music playback?
« Reply #1 on: October 25, 2015, 06:40:38 pm »
Well done for figuring out the problem you had with Picodrive  :)

Picodrive is speed optomised and doesn't have perfect sound emulation. If you want perfect sound you will need to use Genesis-Plus-GX. The sound issue with Picodrive was the main reason we started the port which I continue to maintain. I'm afraid I have no plans to add mp3 support though...which means you will need to go back to .wav or .ogg format sound files.
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tekkaman

  • Posts: 118
Re: SEGA CD PicoDrive distorted music playback?
« Reply #2 on: January 07, 2016, 07:36:37 pm »
The European MegaCD  has problems with picodrive. If you want to play the game in english but with the japanese soundtrack you can use the Beta US version. It works perfect on Picodrive.
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VMD

  • Posts: 4
Re: SEGA CD PicoDrive distorted music playback?
« Reply #3 on: June 03, 2016, 02:07:50 pm »
You don't need to convert from MP3 to WAV, they should work as MP3 too (don't encode with VBR though). On PicoDrive SDL 1.35 I've had an edited CUE with MP3, but the sound was distorted until I set in the 'Change options' the 'Sound Quality' to 22050Hz (stereo). :) I'll append an example-CUE file for Picodrive:

CATALOG 9999999999999
FILE "Example Sega CD - Track 01.iso" BINARY
  TRACK 01 MODE1/2048
    INDEX 01 00:00:00
FILE "Example Sega CD - Track 02.wav" MP3
  TRACK 02 AUDIO
    PREGAP 00:02:00
    INDEX 01 00:00:00
FILE "Example Sega CD - Track 03.wav" MP3
  TRACK 03 AUDIO
    INDEX 00 00:00:00
    INDEX 01 00:01:74
FILE "Example Sega CD - Track 04.wav" MP3
  TRACK 04 AUDIO
    INDEX 00 00:00:00
    INDEX 01 00:01:74
FILE "Example Sega CD - Track 05.wav" MP3
  TRACK 05 AUDIO
    INDEX 00 00:00:00
    INDEX 01 00:01:74


(in the directory itself the files are named 'Example Sega CD - Track 02.mp3' etc.)

also the three BIOS files
eu_mcd1_9210.bin
jp_mcd1_9112.bin
us_scd1_9210.bin
should be in /usr/local/home/.picodrive/
« Last Edit: June 03, 2016, 02:14:58 pm by VMD »
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