Post by thread:Another MP3 idea!

Has anyone tried to build a PIC based MP3 player? I had a quick look at whether it would be possible and it looks as if it is, you can buy dedicated MP3 decoder chips, all you need to do is pipe the data into a decoder and D>A the output. Simple, if you know how, all you need is to be able to store and retrieve the data on a HDD or similar (maybe someone has some ATA to PIC interface?). Good Luck to anyone who wants to try it, I would be interested in the results if anyone tries it. James __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

Has anyone thried to build a PIC based MP3 player? I had a quick look at whether it would be possible and it looks as if it is, you can buy dedicated MP3 decoder chips, all you need to do is pipe the data into a decoder and D>A the output. Simple, if you know how, all you need is to be able to store and retrieve the data on a HDD or similar (maybe someone has some ATA to PIC interface?). Good Luck to anyone who wants to try it, I would be interested in the results if anyone tries it. James __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

I am trying to build a MP3 player, but I am only starting. I would like to know as is the MP3 file format. If somebody to know something on, helps me! Thanks! James Harris wrote: {Quote hidden}> > Has anyone tried to build a PIC based MP3 player? > I had a quick look at whether it would be possible and > it looks as if it is, you can buy dedicated MP3 > decoder chips, all you need to do is pipe the data > into a decoder and D>A the output. > > Simple, if you know how, all you need is to be able to > store and retrieve the data on a HDD or similar (maybe > someone has some ATA to PIC interface?). > > Good Luck to anyone who wants to try it, I would be > interested in the results if anyone tries it. > > James > Cassiano J. Pereira

<x-flowed>At 11:59 AM 2/4/2000 -0500, you wrote: >It's been done and is being sold. Check out >http://www.codepuppies.com/~ben/sens/pic/mp3/ >Has anyone tried to build a PIC based MP3 player? Make that two of us that have working ones and are trying to get the darn things to market. http://altus.drgw.net/~mpic3/ ND Holmes -------------------------------------------------------------------------- Nathan D. Holmes .....maverickKILLspam@spam@drgw.net, ndholmesKILLspamiastate.edu 122 Shepard #3 Box 328 Gilbert, IA 50105 Iowa State University - EE http://www.drgw.net/~maverick PH: 515-663-9368 ------------------------------------------------------------------------- </x-flowed>

<x-flowed>Hi All, As the current subject is audio, I have an Idea/Curiosity too. Probably you know those AIWA Micro Systems (the one with 3CDs on the top). Those systems have a digital output that can be connected to a DAT recorder via optical fibers (see led behind). Won't be interesting decode that signal and maybe manipulate it? Of course a DSP will be more powerfull but for small experiences... Regards, Marcos Sassahara. {Quote hidden}>From: James Harris <.....jaha93KILLspam.....YAHOO.COM> >Reply-To: pic microcontroller discussion list <EraseMEPICLISTspam_OUTTakeThisOuTMITVMA.MIT.EDU> >To: PICLISTspam_OUTMITVMA.MIT.EDU >Subject: Another MP3 idea! >Date: Fri, 4 Feb 2000 08:24:32 -0800 > >Has anyone tried to build a PIC based MP3 player? >I had a quick look at whether it would be possible and >it looks as if it is, you can buy dedicated MP3 >decoder chips, all you need to do is pipe the data >into a decoder and D>A the output. > >Simple, if you know how, all you need is to be able to >store and retrieve the data on a HDD or similar (maybe >someone has some ATA to PIC interface?). > >Good Luck to anyone who wants to try it, I would be >interested in the results if anyone tries it. > >James > >__________________________________________________ >Do You Yahoo!? >Talk to your friends online with Yahoo! Messenger. >http://im.yahoo.com ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com </x-flowed>

This is what I want to do with my car stereo. I already have a 6 disc cd-changer, and a stock stereo and equalizer. The equipment is AC-DELCO. The buttons on the head unit control the cd-changer functions, and it looks as though all the information is transmitted serially through one wire (bidirectional at that!). I think it uses M-BUS. The head unit sends commands to the changer like "Begin playing track 1 disc 1" and the changer sends back info like time elapsed to be displayed on the 4 digit display. I am not sure of the limitations of the player/head unit, like how many tracks per cd it will support. I was thinking that each disc would represent a playlist (6 discs, 6 playlists) with #?? songs. Sadly, my proficiency with pics is not as high as the fellows who posted those PIC Mp3 players. I might be able to design an automatic shutdown unit for a PC in my car, but those stand alone players blow my mind. On Fri, 4 Feb 2000, Rene Chauvet wrote: {Quote hidden}> Has anyone ever tried interfacing an mp3 player through the CD changer input > of a regular deck this way the deck controls it and all you need is a > display > > > Best Regards > Ren > > ICQ #31030202 >

Along these same lines, has anyone tried to control one of the "off the shelf" MP3 players with a PIC? What I would like to do is download several sound segments" to the player and control the playback with the PIC. I've done something similar interfacing with the ISD sound chips, but the maximum sample rate of the ISDs (8kHz) isn't sufficient for my application. Any ideas?