Roman Black Sound (btc)

[Agent36]

Hi Sirvo,
Thanks for the reply will try that, I am using the pickit2 programmer to down load the hex file. I can now down load to the eeprom, not sure if the code is right but its a start. I will keep trying.

Did you get your code working ok?
regards Nick

[sirvo]

Hi Nick,

No yet, The sound is still slow.. everytime I listening to it I remember Louis Armstrong singing 'Wonderful World' when played in the K7 Tape... so many years ago...

Please, let me know if you get it working!

Thanks!

[Agent36]

Hi sirvo,
I have not got anything working yet using romans btc sound encoder. I have been trying gioppy's code example with no luck. Not sure if i've got the hex dump right or my calculations. A one seconds worth of hex code wont fit on a 512 eeprom. Its getting to the point where I might offer a payment to someone on the forum to write this bit of code for me or take me through the steps required to get it working. Adding good audio to my project is becoming very hard work.

If I do get something working i'll let you know, I do have some ISD control code if you want it.
regards Nick

[Ioannis]

Nick, why don't you use an ISD device? Sure will have better audio quality.

Ioannis

[Agent36]

Hi Ioannis,
Have you used the ISD chips much? I have managed to write some code for the the isd4003 with SPI control about 18 months ago, but since then that type has been discontinued in the UK. I have got some of the 1700 series chipcorders and have been playing with them in push button mode. The problem I have with them is removing the pop and hiss that that is in the back ground when in play back, if I could remove or attenuate it they would be fine for my application. I found this last week when searching for ideas, it uses the audio out and parallel port for control.

www.fragtag.com.au/ISD_recorder.htm

Which makes them more appealing, like I said if I could remove the noise i'd be using them.
I have the circuit built as per the data sheet, with an lm386 audio amp connected to the speaker output. If you have any ideas they would be great.

regards Nick

[Ioannis]

It was long time ago when I read the datasheets of the ISD products trying to decide which one to use. Finally the project did not mke it to production and I never used these chips, although I have some to experiment. I may do it sometime.

Why not process the file on a sound editor program on the PC, and then use the line out of the PC to record the clean sound to the ISD?

Ioannis

[Art]

I wish I'd noticed this before doing my talking clock.
Or maybe not now that it's done in asm.

BTW EEPROM is good for storing sound.

I think a PicBasic version would be nice though, for projects where everything can
fit in one chip.