MP3 player for MSX

Master (149)

24-02-2007, 14:12

Anyone interested in a Hardware MP3 player for MSX?

I'm currently working with Dennis Koller on one.
The PCB fits in a Konami case.

We us an extra ATMEL CPU for the communication with the MP3 decoder.
There is also an I2C interface from Philips used for controlling BASS/HIGH/Volume etc.

We already have an working prototype.

If you are interested, please let me know. Then we know how many we have to make, and what the price will be.
This weekend Dennis hopes to finish the final PCB layout. Then he send the layout to the manufacturer.
We hope to have the final product somewhere around April.

You can find a photo of the prototype over here : www.umf.be/viewtopic.php?t=2850

Greetz,

Yobi

By wolf_

Ambassador_ (10135)

24-02-2007, 14:16

y000000000biiiiiiiiiiii !!!!!111!!11!

- Can it cope with 320kbps?
- Estimation of costs
- any chance of having the whole kab00z as one chip one could solder on a cartridge print, so that cart.games could use MP3 as music?

By Yobi

Master (149)

24-02-2007, 14:37

Wolf !!!!!!!!!!!!!!

- It can handle up to 320kbps. But you better use a rate of 128kbps. Then you have more CPU power for other things.
- I'm not sure about the price yet.
- It now has the size of a full konami case.

I hope we can use it also for Internet Radio

By legacy

Hero (570)

24-02-2007, 14:41

Cool, I'm very interesed.
I have already build a mp3 player, and a MSX can command the player using a rs232, but in fact it's a standalone player.

By Yobi

Master (149)

24-02-2007, 14:43

With this one you store MP3 files on your HD and you play them.

By Huey

Prophet (2696)

24-02-2007, 14:58

Yobi,

So that was your secret project

great work.

By Abi

Hero (604)

24-02-2007, 15:04

Yes great stuff, hope you can finish it and sell some! i want one too!!!

By wolf_

Ambassador_ (10135)

24-02-2007, 15:21

more practically speaking: does it play (stream) an MP3 from an MSX storage medium, like CF, HD, CD, or must the whole MP3 be in MSX RAM? Or does the device come with its own RAM for that, and if yes: how much is there available?

Also what CPU were you talking about? The MSX CPU (Z80 or R800)? How is it used by the mp3 player device?

By legacy

Hero (570)

24-02-2007, 15:27

Also what CPU were you talking about? The MSX CPU (Z80 or R800)? How is it used by the mp3 player device?
May I guess??
CPU an Atmege and for encoding a VS100x

By spl

Paragon (1470)

24-02-2007, 15:34

Cool I like it!!! (And I want one also when the project is finished )

Yes, I want one

By Yobi

Master (149)

24-02-2007, 15:40

The MSX reads some bytes from a file and sends it to a small buffer of the 20 MHz ATMEL CPU. Then it will be sent to the MP3 decoder VS1011. This decoder plays the MP3. We can't sent it directly to the MP3 decoder cause it's all serial data.

So there is a very small buffer. For a MP3 of 128kbps you need 16KByte/sec. But thats no problem for the MSX.
What the exact MSX CPU load is... don't know yet.