Hi colin, are the articles and schematics online anywhere? Glad to look at the circuitry and render an opinion on sharing the device. I found a datasheet for the top octave generator. Wouldn't be too difficult to duplicate in a cpld from xlinx or altera if you had to... Could do it at a higher frequency and get more accurate notes, too. (bbd would be fun to try and duplicate with adc/shift reg/dac. Surely difficult to make it sound right...)
-hugh
Hi Guys,many years ago(34 to be exact) I built the Clef Products String Ensemble from articles in Practical Electronics.This was one of the best analogue string machines I have ever heard but I sold it shortly afterwards to raise money to build the Clef Piano.I now have the urge to go back to my youth and build it again.I've managed to get hold of the old magazines and nearly all of the parts but the ones giving me problems were the BBD chips and the top octave generator.I've now got the TDA1022 BBD's but can't find the AY-1-0212 top octave gen.Does anyone out there have one or know where I could source one.As a last resort I could use the one out of the piano but I don't really want to keep swapping it about.Could I slave the O/P from the piano tone gen to the string ensemble via an extra set of buffers to the divider ccts as I am thinking of housing both instruments in the same cabinet using the same keyboard with an extra set of key contacts.Ideally I would like it to have its own tone generator but that depends on if I can get the chip.Any help gratefully accepted Regards Colin.