Although the speech to text converter was very much a hit and miss affair (some words sounded perfect, whereas other words were barely recognisable), with some careful mis-spelling of words and a little speed manipulation, it was possible to achieve clear and understandable sentences.
Another method of producing speech without loading the software, was to feed the buffer directly. This could be done by polling the address &FBFE for it to drop below the value 128 and then feeding the buffer directly by outputting a value to the same address. This loop had to be repeated for each value.
The values (known as allophones) where included in a table in the handbook along with examples of common words.
* [[SP0256 Pin-Outs]]
The interface does NOT contain an oscillator. Instead, OSC1 (SP0256 Pin27) is wired to the CPC's 4MHz clock signal (Expansion port Pin50). Thus producing shorter sounds with higher pitch as when using the recommended 3.12MHz oscillator.
Note: The |SPED command inserts a crude software-delay between the separate allophones (ie. it is NOT a hardware-feature that changes OSC1/OSC2 clock speed or so).
== Supported Software support ===== Games ===* [[Alex Higgens World Pool]]* [[Jump Jet]] (Anirog Software)* [[Roland in Space]]
=== Serious Software ===* [[JumpjetFutureOS]] (Anirog Softwarelimited support)
== Pictures ==
Image:SpeechSynthesizer_PCB_Top.jpg|PCB Top
Image:SpeechSynthesizer_PCB_Bottom.jpg|PCB Bottom
Image:DKTronics Speech Diagram.jpg|Rebuilt Diagram
Image:SpeechSynthesizer PCB Disposition.jpg|Components ID referred to diagram
Image:DK_Speech_Preview.png|SpeechSynthesizer recreated PCB (Gerbers are in download area)
</gallery>
* [[Media:DKSPEECH.ROM|DK'Tronics Speech ROM]] (Amstrad BIOS Extension)
* [[Media:Sp0256-al2-reversed-bit-order.zip|SP0256-AL2 ROM]] ('''caution''' - the bytes in the file are in reversed bit-order, ie. the "Target" values are unreversed, all other opcodes and parameters are reversed)
* [[Media:DK_Speech_Gerber.zip|DK'Tronics Speech PCB Gerber]] (Gerber files for PCB recreation)
==Links==
*{{CPCPower|4724}}
*[https://framagit.org/offset/dk-tronics-speech-acepansion DK Tronics Speech ACEpansion] on Framagit
[[Category:PeripheralsFutureOS]] [[Category:Manual]][[Category:Music and sound]] [[Category:ManualPeripherals]]