1990 digital sound in decimal (base 10,not binary) without a computer

Demonstration of a base-10 "stereo" digital sound player circuit from 1990.
That means that each sample of the sound consists of a single digit from 0 to 9.
It was designed for experimenting with as a digital sound player but it was used most often to test chips for phonetic human voice synthesizers, 100 of which we sold.
The demonstration chip in this video has two silly phrases on it.
The circuit "abuses" a 6502 processor, which is not running any code.
Description to be updated later.

Category:

Science & Technology

Tags:

• decimal
• digital
• sound
• player
• human
• voice
• speech
• synthesizer

[Amishman35]

They actually had digital IC recorders in 1990.0 A.D? Wow, I'm getting old. I remember those 10 second voice recorders from 1996 or so, but didn't think it was around before then.

[VironCybernet]

This is an EPROM with BCD data burned on it. 2 decimal digits per byte, like hex between 00-99 with no ABCDEFs. The left digit is for one sound track and the right digit is for the other. It was possible to record stereo this way without analog to digital converters (but nobody does that now because everything about this is obsolete, even because of what you mentioned came later).

[29riteshkakkar]

check my....

[29riteshkakkar]

nice work..........................­

[native707]

funny.........

[xoio]

the ability to sample has been around since the 70's ... top end recording studios had analogue to digital converters that recorded onto early DAT tape back then.