File talk:Speech synthesis electronics.jpg

This is a picture of a Bell Labs science kit from around 1960-1965. I did not have the kits but had a friend who demonstrated this one and the Cardiac computer. This device has two principal sections. A vowel generator section (with three resonant frequencies (formant sections) (additive sysnthesis?)) and a vocal chord section(buzz source). The instruction book that came with explained how to change the supplied extra capacitors and resistors to change the vowels through eeee, a-a-a, i-i-i, o-h-h, o-o-o, u-u-u. Use of the buzz source to make consonants m-m-m, n-n-n. Also explained how to use white noise with attack (rise time) to make consonants p--, tss, ttt, ssss, sch. The sound was not all that realistic but exciting as we transitioned into the Moog era and Switched On Bach. I heard "Daisy" on "Music from Mathematics" http://wfmu.org/365/2003/260.shtml and was not surprised at the speech quality. When Dave shut down HAL, and I heard Daisy again. Ccalvin (talk) 02:05, 12 October 2011 (UTC)