Sonsivri

Hello:

Is posible to save human voice in a flash memory?? I wish to program with PicBasic and a 18F6720.
The circuit has a microfone in a analogic input, a flash memory and a speaker. First save a voice in the memory and then play it in the speaker.
I don't know about play human voice. How I can do it??. I need some track. ???

thnks

Hi:

I think is more simply to use an ISD25120, you can record in the memory sound or voices, to do this whith a pic, i think is very dificult, you'll have to generate the correct frecuences to generate voices, so, use an ISD, look at here:

http://www.freewebs.com/glafebre/relojparlante.htm

That is a clock, can say the time talking  ;D

I hope that can help you.

Thanks Deimos. But i have a program with ISD4004. The problem is to save the voice in the ISD because is necesary to save it playing with a sound source. And is so much time. I want to save the voice digitally. This is very fast, just a few seconds.

you may find a way to generate the correct frecuences to generate voices, but i dont know how, sorry  :-\

Hi, have a look at this. I used it with success.
http://www.romanblack.com/picsound.htm

Say Winbond ISD series bye bye !!!

I used two solutions with great success:

Devantech SP03 - Text to Speech Synthesizer:
http://www.robot-electronics.co.uk/shop/Speech_Synthesizer_SP032006.htm

ISD ChipCorder & Speech ICs:
http://www.winbond-usa.com/en/content/view/36/140

Since you have a fast MCU, I would suggest too, to use Romans Black technique. Good and compact.

I have a file generate with Romans Black. How I can use it??

Take a look at

http://www.picbasic.org/forum/showthread.php?t=6870

there is an interesting project with audio.  :)

What u have is a lookup table. I don’t know how to use it with picbasic but I 'll send 2 examples I made. (Assemble it with mpasm.exe)
http://rapidshare.com/files/59593663/picsound.rar.html

You can also use Aplus’s  APR 9600 stand alone ( no required of micro controller) IC for recording and playback. It is similar to ISD 2560 but I think reproduction is better than ISD. See for more details http://www.aplusinc.com.tw/pro-recording.htm
Other IC like APR 6008 ( 8 minute recording & playback) & APR 6016 ( 16 minute) with SPI interface also available.
 
ABBOSE

You may use a PIC with PWM (like 16F628). Or a 16F84 conected to 8 bit DAC (with resistors are more cheap...).
Translate the the Windows WAV file with pre recorded voice to a BIN file end program this on a 24C256 EEPROM and make a program to scan the adresses.

This works perfect for records of some seconds of course...

Just an inspection;
Human ear's work between 20 Hz and 20 KHz, that means we need to sample 19980 steps.
It will enough to save 1 sample for 14 bit (16384 steps).

humm

what about the voice filter?

any suggestion?
any design?

i tried 1 bit algorithm with pic and eeprom simulated  in proteus but output noisely unfair

hi Sun_rise_pt,

have you done this already? could you be so kind to share the
schematic diagram and source code  to everyone...  :)

esp. the one using PIC 16f628 bec. it is cheaper to build...thank you.. ;)

If you want to use pic16F628 have a look at this site: http://home.alphalink.com.au/~derekw/pictalker/main.htm

Wait few days please...

I make a upload for that... ...and all works fine. Past year I've buit a bird repeller with a falcon song to prevent the aproximation of H5N1 flu desease.

All in one pictalker (software,firmware, SCH,PCB protel99SE format)

Some time ago i made some experiences with a good voice recorder
it's the ISD 1420, simple to handle and good quality sound
I've made a pcb for testing, with Altium
If someone is interested please let me know

Txs

hi dulce_antunes

Im interested,can you share it? tnx

Hi,
There is a very good project for human voice in EPE magazine (Dec 2007) starting at page 39. Download from: http://www.sonsivri.com/forum/index.php?topic=1896.405

I still think that the best way is using an ISD.

Look here:

http://www.freewebs.com/glafebre/relojparlante.htm

Is there a simple clock to save some data and then reproduces the time voice.

It is designed with a ISD25120.

isd chips has not enough memory for the record
if you wanna record more long voice,, you have to connect several isd s with addressable array. made disadvantage for me, some times ago:)

I think the 40 series is great, can record 2-16 minutes duration

http://www.winbond-usa.com/products/isd_products/chipcorder/productbriefs/ISD4000_PBa.pdf

if you record it on PC you can use http://audacity.sourceforge.net/  removing the small pauses and
other between the sounds to get more out of the ISD devices.

Aso if you use numbers only records number 1-20 , 30 , 40 ...
when you what to speak 24  , use 20 and the 4

br
Smartguy

 :) :)

In the french magazine Electronique Pratique have two voice recorders on EEPROM.
Please look the code here:
http://electroniquepratique.com/images/images_doc/PROG_EP295_044.zip
...and the PCB layout:
http://electroniquepratique.com/images/images_doc/CI_EP295_044.zip

First you make a voice record on your PC with wav format file...

The file wav_bin.exe are a converter (and cleaner of some "trash") from wav file to bin.

The PIC scans the EEPROM and drives a LPF and after a AF amplifier.

The circuit and firmware are very simple and all works fine

check this out, I tried it and was fairly pleased, just not enough time to go into it further.

http://www.romanblack.com/picsound.htm

Caveman

Is here any picbasic or C gurus, if they could do a dummys guide to Romans Black sound asm-file HowTo use with picbasic or CCS or mikroC  :P

yours

http://rapidshare.com/files/90011881/basic-voice.rar.html      double prj...
and   http://www.compile-it.com/Proton/PIC_WAV_PLAYER.zip