MP3 Encoding and Decoding IC suggestions

[J.A. Legris]

I want to add MP3 encoding and decoding to an existing instrument (8-
bit microcontroller-based) so we can play audio samples obtained
either in the filed or else distributed on SD cards. Can anyone
suggest a low-cost IC that includes integrated record, playback and SD
access functions?

 

[Gary Tait]

I want to add MP3 encoding and decoding to an existing instrument (8-
bit microcontroller-based) so we can play audio samples obtained
either in the filed or else distributed on SD cards. Can anyone
suggest a low-cost IC that includes integrated record, playback and SD
access functions?

Look into the SOCs used in typical MP3 players. Depending, you may be able
replace you current micro and use the SOC, or interface the two with a
serial bus.

 

[J.A. Legris]

Look into the SOCs used in typical MP3 players. Depending, you may be able
replace you current micro and use the SOC, or interface the two with a
serial bus.

Are you familiar with the following products? I'm wondering if they
are widely used.

http://www.vlsi.fi/products/icprod.shtml

Thanks,
Joe

 

[mpm]

Atmel offers a couple 8051 derivatives that support MP3, local play &
record, and removable memory. Not exactly what you're looking for if
you're wanting to keep your existing processor.

Go here: http://www.atmel.com/dyn/products/devices.asp?family_id=636

Also, Winbond has several proprietary record/playback solutions, but
none that support removable flash memory. At least, not last time I
checked. Good luck. -mpm

 

[Joe G \(Home\)]

how long is the recordings?

how offen will you replace the records.

Joseph

 

[J.A. Legris]

how long is the recordings?

how offen will you replace the records.

Joseph

I want to add MP3 encoding and decoding to an existing instrument (8-
bit microcontroller-based) so we can play audio samples obtained
either in the filed or else distributed on SD cards. Can anyone
suggest a low-cost IC that includes integrated record, playback and SD
access functions?

The recordings are up to 30 minutes in length and they could be
replaced qute frequently. The user might be swapping SD cards from a
library of sounds, or recording new sounds at any time.

The Atmel processors suggested by mpm above are just about perfect
except they have no MP-3 encoding, just decoding. I may have to use a
DSP with some licensed software (yuck!). Maybe I can make an
unlicenced encoder using an op-amp, a decoder and a genetic
algorithm ;-)

 

[mpm]

The recordings are up to 30 minutes in length and they could be
replaced qute frequently. The user might be swapping SD cards from a
library of sounds, or recording new sounds at any time.

The Atmel processors suggested by mpm above are just about perfect
except they have no MP-3 encoding, just decoding. I may have to use a
DSP with some licensed software (yuck!). Maybe I can make an
unlicenced encoder using an op-amp, a decoder and a genetic
algorithm ;-)

Are you sure about that??
I'm almost positive their development board supports recording
functions....
Maybe they're not doing that with the processor, but I thought they
were..?

Take another look at this Atmel reference design.
It clears says "voice recording/playing"

http://www.atmel.com/dyn/products/tools_card.asp?family_id=636&family_name=MP3+Player&tool_id=2925

-mpm

Can you email me offline with your application?
We do something similar here, and if our markets or products don't
overlap, I'd be happy to tell you how you can solve this whole thing
from China. For low dollars, right off the shelf.

 

[J.A. Legris]

Are you sure about that??
I'm almost positive their development board supports recording
functions....
Maybe they're not doing that with the processor, but I thought they
were..?

Take another look at this Atmel reference design.
It clears says "voice recording/playing"

http://www.atmel.com/dyn/products/tools_card.asp?family_id=636&family...

-mpm

Can you email me offline with your application?
We do something similar here, and if our markets or products don't
overlap, I'd be happy to tell you how you can solve this whole thing
from China. For low dollars, right off the shelf.

Sorry, I can't divulge any secrets just yet ;-)

I don't see any evidence of MP-3 encoding on any of the above Atmel
devices, but they do mention making .wav files:

http://www.atmel.com/dyn/products/tools_card.asp?tool_id=2924

If I'm stuck I may resort to using .wav files instead of MP-3.

Thanks,
Joe