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I have a CD-ROM on which three MP3 files are stored.

When I put it into the player of my car, the music starts playing.
When I put it into an old CD-player (bought somewhere between 1990 and 2000, I think), I get the message "NO DISK", which means it doesn't recognise the format.

In two days, I'll need that music to be played during a funeral.
Today, I'll try to play that music (as a repetition) on the church's music installation.

In case that fails, I believe I'll need to reformat that CD in order to obey the early CD format.

What is that format, and are there some online tools I can use for this?

Edit:
In the meantime, I've understood that ripping software is to be used in combination with burning software, the latter for burning information to a CD. I have installed Fre:Ac as ripping software but it seems that the firstly advised burning (Nero Burning ROM) is not downloadable for free.
Can I just use Fre:AC for converting the MP3 files into CD format and copy that on the CD, using simple copy-paste or am I missing something?

Thanks in advance
Dominique

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    The whole disk is formatted specifically for audio - I vaguely recall using a software called buuuurn, but I don't recall how many Us it had Commented Sep 12, 2025 at 3:27
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    "What is that format" - Red Book. Commented Sep 12, 2025 at 3:43
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    videohelp.com/software/Burrrn one U many Rs Commented Sep 12, 2025 at 4:26
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    I used this under Windows in the past: infrarecorder.org Commented Sep 12, 2025 at 13:09

3 Answers 3

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What is that format and are there some online tools I can use for this?

The format as already mentioned is called "Red Book" or "CD-Audio".

It is not a file format, or even a filesystem format like UDF or ISO9660 are – better think of it as an entirely different class of CD contents than a "data" CD.

Can I just use Fre:AC for converting the MP3 files into CD format and copy that on the CD, using simple copy-paste or am I missing something?

No. In the original audio CD format (Red Book), the tracks are not files. Such a CD has no filesystem at all, only a Table of Contents describing ranges of raw audio data sectors.

In other words, the audio is stored alongside any 'data' track, not within it. Indeed standard audio CDs, the kind you're looking for, really have no 'data' track at all.

(Mixed-mode CDs are uncommon, but imagining the track structure of one – with multiple audio tracks adjacent to a data track – might aid understanding. Maybe a close analogy would be if an HDD's partition table had a separate partition for each audio track, and that track .wav was dd-copied into its dedicated partition.)

Except there's still more to it – for example, "closing" each track is done by sending a specific SCSI command to the CD burner device, not merely by writing ordinary data.

So an online conversion tool could give you files in the correct format (which is just plain uncompressed PCM, like in typical .wav files) but it could not build the entire track structure. Even if the online tool provides an "image" in .cue/.bin/.wav format, it would still need to be written using a specific tool that understands .cue and knows how to write each of the multiple tracks – and those are actually harder to find than "regular" audio CD burning tools.

There are many programs which can burn an audio CD from a bunch of MP3s. Many music players (e.g. iTunes or Windows Media Player) still have, or used to have, that capability. Among dedicated tools, CDBurnerXP is capable of doing so. If you're running Linux, K3b used to be popular.

All such tools will automatically convert your audio files into the correct format (44.1kHz PCM) as part of the process, so usually you can just drop an MP3 into the list.

In all cases, though, it is a whole dedicated mode and not a specific type of file or filesystem "formatting". (For example, note how the K3b screenshot has a flat list of tracks, without any folders.)

Finally – keep in mind that some very old CD players were unable to read a CD-RW, so if your player was bought in early 1990s, it might be necessary to use a CD-R specifically.

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    I think some early CDrom games did hybrid. Command and Conquer comes to mind Commented Sep 12, 2025 at 11:58
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    The ones with data first tended to produce horrible screeching noises if you put them in an old CD player and hit "previous track", whereas ones with data last tended to do nothing. (I might be mixing those up – but there were definitely two kinds of hybrid CD-ROM.) Commented Sep 12, 2025 at 13:55
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    Mixed mode CDs are not all that uncommon. They were pretty ubiquitous in the 90s, where one CD could hold both a video game and red book audio for high-quality media. Plenty of Playstation games can just be played in a CD player to hear their soundtrack. Even ones that didn't have red book soundtracks often had one track of red book audio on them, a recording of someone (usually a voice actor for one of the game's characters, if applicable) saying something along the lines of "This is a Playstation/SegaCD/Dreamcast/etc disc, not an audio CD. Don't play track 2 or it will damage your speakers." Commented Sep 12, 2025 at 15:51
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    The opposite of hybrid games was common for a while: the Enhanced CD, an album with a data track. Putting it in your computer gave you a multimedia interface that was essentially an interactive way of displaying the liner notes while playing audio, and maybe a music video or interview. Commented Sep 12, 2025 at 23:26
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    @grawity Early hybrid CDs exploited the fact that the CD-ROM standard ("Yellow Book") re-used the track layout from the CD Audio standard ("Red Book"); by placing a data track first, then any number of audio tracks, both standards could be met. This was widely used in games for full-quality music tracks. Later versions used the concept of "sessions" (introduced in the "Orange Book" for CD-Rs), where a complete audio CD could be followed on the same physical disk by a complete CD-ROM, rather than mixing the tracks. This was commonly used to "enhance" an audio CD with extra content. Commented Sep 13, 2025 at 14:18
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Its been a while since I used it but Burrrn (3rs 1 u). I don't have a CD burner any more - so I can't test it but it does still seem to run on a modern machine (despite being 20 years since the last release). Basically just drag in the files into the window and press Burrn. It'll handle converstion, and the redbook format specific requirements. Sometimes some drives might have issues with burnt CDs, but least when I used it, it mostly just worked.

I recall it handles most input formats natively.

enter image description here

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  1. Convert MP3 into WAV using FreAC

44.1 khz 16bit wave stereo

  1. Open a CD burning program and choose "Audio CD" (it must not be Data CD).
  2. Add the WAV files in desired order.
  3. Burn to a CD-R at a medium speed like 8x for your compatibility
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  • @journeyman geek I answered the question I know it was you who downvoted me Commented Sep 12, 2025 at 4:29
  • In practice most decent burners should convert the audio for you. Why the converstion to the audio format specifically? Commented Sep 12, 2025 at 4:30
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    Well you did not properly test if it's working since you don't have a cd burner. you could've said to use itunes or nero for what its worth since they are reliable Commented Sep 12, 2025 at 4:36
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    itunes can definitely burn to a cd, instead you recommended a obscure tool from 20 years ago Commented Sep 12, 2025 at 4:39
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    The mechanism of burning CDs hasn't really changed since Windows XP. Any tool that worked in XP (one that uses the Windows-provided APIs and not ASPI/SPTD) will work on any later Windows system. Commented Sep 12, 2025 at 5:02

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