I have a project that will incorporate pre-recorded sounds. Something like
nature sounds; ocean waves, birds, etc. Does anyone have any leads as to a
manufacturer that might supply such an item. I've posted some requests to
alibaba.com but have had no responses yet. Obviously the desired module
will interface to a microcontroller in order to play the desired sound at
the appropriate time. A module incorporating an SPI or I2C interface would
be desired.

Thanks!

>I have a project that will incorporate pre-recorded sounds. Something
like
>nature sounds; ocean waves, birds, etc. Does anyone have any leads as to
a
>manufacturer that might supply such an item. I've posted some requests
to
>alibaba.com but have had no responses yet. Obviously the desired module
>will interface to a microcontroller in order to play the desired sound
at
>the appropriate time. A module incorporating an SPI or I2C interface
would
>be desired.

Check out this solution for single or dual channel ADPCM audio from
Renesas. It uses very low-cost MCUs with on-chip flash for the program and
internal or external storage for the sound files.

http://sg.renesas.com/fmwk.jsp?cnt=product_folder.jsp&fp=/products/tools/middleware_and_drivers/tiny_soft/softlib_so
und_tiny

Renesas uses their free IDE tool HEW to manage the project and the sound
files.

--CG

jjwsei wrote:
> 
> I have a project that will incorporate pre-recorded sounds.
> Something like nature sounds; ocean waves, birds, etc. Does
> anyone have any leads as to a manufacturer that might supply such
> an item. I've posted some requests to alibaba.com but have had no
> responses yet. Obviously the desired module will interface to a
> microcontroller in order to play the desired sound at the
> appropriate time. A module incorporating an SPI or I2C interface
> would be desired.

The state of Maine has no restrictions against visitors making
recordings.  You may even buy the recorder, and the tapes or
casettes, in the state.

For birds, almost any morning at my summer home will suffice.

-- 
 [mail]: Chuck F (cbfalconer at maineline dot net) 
 [page]: <http://cbfalconer.home.att.net>;
            Try the download section.


** Posted from http://www.teranews.com **

On 19/06/2008 jjwsei wrote:

> I have a project that will incorporate pre-recorded sounds. Something
> like nature sounds; ocean waves, birds, etc. Does anyone have any
> leads as to a manufacturer that might supply such an item. I've
> posted some requests to alibaba.com but have had no responses yet.
> Obviously the desired module will interface to a microcontroller in
> order to play the desired sound at the appropriate time. A module
> incorporating an SPI or I2C interface would be desired.
> 
> Thanks!

http://www.pjrc.com/mp3/sta013.html

-- 
John B

On Jun 19, 8:18 am, "jjwsei" <jwal...@thorleyindustries.com> wrote:
> I have a project that will incorporate pre-recorded sounds. Something like
> nature sounds; ocean waves, birds, etc. Does anyone have any leads as to a
> manufacturer that might supply such an item. I've posted some requests to
> alibaba.com but have had no responses yet. Obviously the desired module
> will interface to a microcontroller in order to play the desired sound at
> the appropriate time. A module incorporating an SPI or I2C interface would
> be desired.
>
> Thanks!

There is a company called WinBond that makes digital recorder and
playback chips that are dirt simple to interface to.  Check out
http://www.winbond-usa.com/en/content/view/36/140/
I've used some of their chips in the past and had very good results.

Alternatively, if you're looking to make a large number of identical
products, why not just store the digital versions of the sounds to an
EPROM and just send it to a DAC at the correct sampling frequency?
Many microcontrollers even have a PWM output built into the hardware
so you wouldn't need an external DAC even, just low pass filter the
PWM, set to the correct frequencies as appropriate.
-Will