Hello All,

I am a novice to most of this, still a student at a community college...
I am trying to build a talking GPS unit...
I can't seem to find the right chip to use to store and play back the audio.
I found a few "Text to Speech" chips, but the sample audio on line was not good...
So my next idea was to pre-record the audio elements needed,
then load them on a chip of some sort.
I have a list of about seventyfive words in all.
Like ONE. TWO, Twenty, Fifty, North and so on..
Place the elements on some kind of chip, each speech
element with its own addressable location and the
Pic 18F will parse out the incoming serial string,
pick the voice elements in the order needed and
send the audio on its way....
I have not rcorded the voice yet, I am not locked
into a file type, .WAV or other format is fine.
I would like solid telephone quality audio playback.
Say a sample rate of 8kHz, 80Hz to 3kHz, max storage
time is 120 seconds should work ???
Thanks in Advance,

Allen
Tempe Arizona

 

You should check out a line of IC's by Winbond:

The ISD2500 ChipCorder® Series provides highquality, single-chip record/playback solutions for 32- to 120-second messaging applications. The
CMOS devices include an on-chip oscillator, microphone preamplifier, automatic gain control, antialiasing filter, smoothing filter, speaker amplifier and high density multilevel storage array. In addition, the ISD2500 is microcontroller compatible, allowing complex
messaging and addressing to be achieved. Recordings are stored in on-chip nonvolatile
memory cells, providing zero-power message storage. This unique, single-chip solution is made possible through ISD’s patented multilevel storage technology. Voice and audio signals are stored directly into memory in their natural form, providing highquality, solid-state voice reproduction.

 

Hello All
It seems that I found what I am looking for.....
http://www.nuvoton.com/hq/enu/Produ...ronicsIC/ISDVoiceIC/ISDChipCorder/ISD5100.htm

It looks like the 51XX or the 40xx chip will work...
So now I have a project to do over the winter break

Thanks
Allen
Tempe Arizona