Maker Pro
Maker Pro

Continuous Sound Playing IC

C

CCD

Jan 1, 1970
0
Hi friends,
little help here. I need 2 design a circuit to play a prerecorded
music continuously, the length of the recording is only 30sec. I tried
APR9600 and connected it as per the datasheet, used it in auto rewind
mode. It plays continuously but at the end of that 30sec recording, it
gives a little silence, which it not at all desired..
Any other chip which can do this easily?? m trying to avoid any
microcontroller here, but if it is must, i can consider it.!
 
J

Jon Slaughter

Jan 1, 1970
0
CCD said:
Hi friends,
little help here. I need 2 design a circuit to play a prerecorded
music continuously, the length of the recording is only 30sec. I tried
APR9600 and connected it as per the datasheet, used it in auto rewind
mode. It plays continuously but at the end of that 30sec recording, it
gives a little silence, which it not at all desired..
Any other chip which can do this easily?? m trying to avoid any
microcontroller here, but if it is must, i can consider it.!

Supposedly the pic32's have a lot of audio features(such as decoding) and
work well for sound. Would be easy to set something up to use if you have
used them before. Just an option though.
 
C

CCD

Jan 1, 1970
0
Supposedly the pic32's have a lot of audio features(such as decoding) and
work well for sound.  Would be easy to set something up to use if you have
used them before.  Just an option though.

Hi,
thanx, but I've used 8/16-bit controllers only, and besides, this
circuit is required to be cost-effective and quick to build
 
M

mpm

Jan 1, 1970
0
Hi friends,
little help here. I need 2 design a circuit to play a prerecorded
music continuously, the length of the recording is only 30sec. I tried
APR9600 and connected it as per the datasheet, used it in auto rewind
mode. It plays continuously but at the end of that 30sec recording, it
gives a little silence, which it not at all desired..
Any other chip which can do this easily?? m trying to avoid any
microcontroller here, but if it is must, i can consider it.!
-----http://dharmanitech.blogspot.com

How many of these do you need?
Are you developing a new product, or just trying to solve a one-off
type problem.

If the latter, Google search "Digital Audio Repeaters".

I do know that Eletech has a model that will do exactly what you want,
right off the shelf, at fairly reasonable pricing. Recognizing that
"reasonable" means different things to different folks.

http://www.eletech.com/Products/products.htm

Eletech also has a QuickVoice chip set available.
Been a long time since I played with them.

Good luck.
 
C

CCD

Jan 1, 1970
0
Are there any other requirements you are looking for that you did not
mention in your first post ??

Any micro with a DAC output may work for you:

You mean, first convert the voice into digital using an ADC than store
it into EEPROM and while playing it keep sending EEPROM data to DAC??
that will ask for a huge EEPROM even for 30 sec (may be >1Mb, if i
sample at 50k). Though i've nevr tried audio signals on ADC/DAC, i can
try this one, but isn't there some simpler solution with inbuilt DAC
+memory+ADC???
 
C

CCD

Jan 1, 1970
0
How many of these do you need?
Are you developing a new product, or just trying to solve a one-off
type problem.

If the latter, Google search "Digital Audio Repeaters".

I do know that Eletech has a model that will do exactly what you want,
right off the shelf, at fairly reasonable pricing.   Recognizing that
"reasonable" means different things to different folks.

http://www.eletech.com/Products/products.htm

Eletech also has a QuickVoice chip set available.
Been a long time since I played with them.

Good luck.

The Eletech models look quite big! m thinking of a small PCB which can
fit into a toy kind of thing. At the moment i need less than 10 to be
fitted in a local store for playing continuously a theme music, which
may be required to change later..
Thanks.
 
J

Joe G \(Home\)

Jan 1, 1970
0
Are there any other requirements you are looking for that you did not
mention in your first post ??

Any micro with a DAC output may work for you:

You mean, first convert the voice into digital using an ADC than store
it into EEPROM and while playing it keep sending EEPROM data to DAC??
that will ask for a huge EEPROM even for 30 sec (may be >1Mb, if i
sample at 50k). Though i've nevr tried audio signals on ADC/DAC, i can
try this one, but isn't there some simpler solution with inbuilt DAC
+memory+ADC???

It's more than DAC+Memory+ADC........ how is the memory controlled.......
how will you clock the address lines of the memory and detect the end and
loop arround?

have you looked at a 64kx8 memory? how any data lines , how many address
lines.... how will you clock the address lines..

A micro can take care of all this logic.

Joe
 
M

mpm

Jan 1, 1970
0
Hi friends,
little help here. I need 2 design a circuit to play a prerecorded
music continuously, the length of the recording is only 30sec. I tried
APR9600 and connected it as per the datasheet, used it in auto rewind
mode. It plays continuously but at the end of that 30sec recording, it
gives a little silence, which it not at all desired..
Any other chip which can do this easily?? m trying to avoid any
microcontroller here, but if it is must, i can consider it.!
-----http://dharmanitech.blogspot.com

Another possibility is the ISD4004 (or similar chips) avail from
Digikey.
Search on Keyword = "Winbond", then click Voice Recorders...

http://search.digikey.com/scripts/DkSearch/dksus.dll?Cat=2556441;keywords=Winbond

Some of these are stand-alone, but limited voice storage / quality.
Don't know your spec's, so can't recommend any particular ones.
I do know the ISD4004' will instantly loop.

The remaining ones will require a small micro, but your overhead in
code will be greatly simplified by using one of these outboard voice
chips. Just select the address and function (play record, etc..), and
you're ready to rock and roll.
 
C

CCD

Jan 1, 1970
0
Another possibility is the ISD4004 (or similar chips) avail from
Digikey.
Search on Keyword = "Winbond", then click Voice Recorders...

http://search.digikey.com/scripts/DkSearch/dksus.dll?Cat=2556441;keyw....

Some of these are stand-alone, but limited voice storage / quality.
Don't know your spec's, so can't recommend any particular ones.
I do know the ISD4004' will  instantly loop.

The remaining ones will require a small micro, but your overhead in
code will be greatly simplified by using one of these outboard voice
chips.  Just select the address and function (play record, etc..), and
you're ready to rock and roll.

Thanx man,
m going to use ISD1740 with 40sec recoring time, Ithink that one will
do.
I've got ATmega32 kit also with ADC & DAC onboard, i need only a
memory chip., for my experiment sake, i'll try that one,too!!
Thank you for the response, guys!
 
E

Eeyore

Jan 1, 1970
0
CCD said:
Hi friends,
little help here. I need 2 design a circuit to play a prerecorded
music continuously, the length of the recording is only 30sec. I tried
APR9600 and connected it as per the datasheet, used it in auto rewind
mode. It plays continuously but at the end of that 30sec recording, it
gives a little silence, which it not at all desired..
Any other chip which can do this easily?? m trying to avoid any
microcontroller here, but if it is must, i can consider it.!

Holtek do some audio chips. Not sure if they'd fit your application.

Graham
 
M

mpm

Jan 1, 1970
0
Thanx man,
m going to use ISD1740 with 40sec recoring time, Ithink that one will
do.
I've got ATmega32 kit also with ADC & DAC onboard, i need only a
memory chip., for my experiment sake, i'll try that one,too!!
Thank you for the response, guys!

Cool. Glad to help. Good luck.
Looking at the datasheet, you may want to amplify the audio.
If so, and if you have 12-volts, take a look at the National
Semiconductor LM4950
Minimum parts. Plenty of oomph for the money.

-mpm
 
Top