CPCWiki - THE Amstrad CPC encyclopedia! - User contributions [en]

File:DK Speech Gerber.zip

2025-03-10T00:56:40Z

Gamon81: Gamon81 uploaded a new version of File:DK Speech Gerber.zip

File:DK Speech Preview.png

2025-03-07T20:59:45Z

Gamon81:

File:DK Speech Gerber.zip

2025-03-07T20:59:25Z

Gamon81:

Dk'tronics Speech Synthesizer

2025-03-07T20:39:24Z

Gamon81:

[[Dk'tronics]] Speech Synthesizer based on [[SPO256]]-AL2 chip.

== Overview ==

The Dk'tronics speech synthesizer came with the standard handbook which gave instructions for all Dk'tronics add-ons.

The speech synthesizer also had the classic Dk'tronics casing as all their CPC products had, with the exception of a fly-lead which could be connected to the stereo output of the CPC.

It also had two mono outputs for the supplied speakers, a volume control on the right hand side and the balance could be adjusted with a small screw-driver through a hole below the volume.

Two versions of the synthesizer were available. One where the software was supplied on a cassette and a second version with the software on an internal ROM within the unit.

When the ROM version was connected and working properly, it reported the message 'Speech ROM Ver. 1.1' on the screen.

Dk'tronics changed suppliers of the speakers more than once, so several different versions of the speakers exist, including one version with a swiveled bracket for wall or desk mounting.

== Software ==

The software supplied on cassette or ROM gave the user 11 new RSX (bar) commands to manipulate the SPO256
either directly or using it's 'text to speech' ability (with questionable success).

The commands available :

* |SPEAK - Loaded the ROM software, listed the commands and said the sentence 'DK'tronics speech synthesizer' (badly)
* |SPON - Used to turn on the read buffers interrupt
* |SPOF - You can guess what that one did yourself
* |FEED,n - Feed data directly into the speech buffer (up to 30 comma separated values between 5 and 63)
* |FLUS - Cleared both the speech and text buffers
* |SPED,n - Controls the speed of the text (n being a value between 0 and 15 where 0 is the fastest speed)
* |OUTM,1 - Redirected the print command's output to the speech to text converter
* |OUTM,2 - Redirect both the print and all other text (List etc.) to the converter
* |OUTM,3 - Redirected all text (as with 2), but also printed to the screen in parallel
* |LEFT,v - Reported the available memory left in the buffer (where v is a variable)
* |SAY, "text" - Was the standard command to send text to the synthesizer (where x is the text to be spoken)
* PRINT "`text`" - PRINT with reversed-single-quotes, works same as |SAY
* The cassette version seems to support only PRINT, the ROM version supports both PRINT and |SAY

However on the 464 the user was required to assign the text to a variable, whereas 664 and 6128 users could
use the command directly:

464 a$="Sample text": |Say, @a$

664/6128 |Say, "Sample text"

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.

The handbook also included programming examples in both BASIC and Assembly.

== Technical ==

Uses I/O port: [[I/O_Port_Summary|#FBFE]]

Port FBFEh READ:
N/A Status 1 (none, SP0256.Pin8 is not connected) ;SBY Pin, Standby
bit7 Status 2 (0=Ready to Receive Data, 1=Busy) ;LRQ Pin, Load Request
bit6-0 Not used (garbage, probably usually high-z)

Port FBFEh WRITE:
bit7-6 Not used (should be zero)
bit5-0 Allophone number
* A new allophone number can be send when Status.Bit7=0.
* Only lower 6bit of databus are connected in the dk'tronics version.
* The remaining upper 2bit are GNDed via a 0 Ohm resistor.

For details on the speech chip, see:

* [[SP0256]]
* [[SP0256 Voice Generator]]
* [[SP0256 Instruction Set]]
* [[SP0256 Allophones]]
* [[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).

== Software support ==
=== Games ===
* [[Alex Higgens World Pool]]
* [[Jump Jet]] (Anirog Software)
* [[Roland in Space]]

=== Serious Software ===
* [[FutureOS]] (limited support)

== Pictures ==

<gallery caption="dk'tronics Speech Synthesizer (Boxed)">

Image:Dk tronics speech 1.JPG|
Image:Dk tronics speech 2.JPG|
Image:Speechsynth.png|

</gallery>

<gallery caption="dk'tronics Speech Synthesizer (cassette)">

Image:Speech Software Tape - side B (Dk'Tronics).jpg|Fast Side
Image:Speech Software Tape - side A (Dk'Tronics).jpg|Slow Side

</gallery>

<gallery caption="dk'tronics Speech Synthesizer (464 ROM Version)">

Image:30-08.2009 001.jpg|
Image:30-08.2009 008.jpg|
Image:30-08.2009 014.jpg|

</gallery>

<gallery caption="dk'tronics Speech Synthesizer (464 Normal Version)">

Image:30-08.2009 101.jpg|
Image:30-08.2009 103.jpg|
Image:30-08.2009 108.jpg|
Image:SpeechSynthesizer_Front.jpg|Front
Image:SpeechSynthesizer_Back.jpg|Back
Image:SpeechSynthesizer_Left.jpg|Left
Image:SpeechSynthesizer_Right.jpg|Right
Image:SpeechSynthesizer_Top.jpg|Top
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>

<gallery caption="dk'tronics Speech Synthesizer (6128 ROM Version)">
Image:DKSPEECH_6128_Top.jpg|Top
Image:DKSPEECH_6128_Front.jpg|Front
Image:DKSPEECH_6128_Back.jpg|Back
Image:DKSPEECH_6128_PCB_Top.jpg|PCB Top
Image:DKSPEECH_6128_PCB_Bottom.jpg|PCB Bottom
</gallery>
* Note: The unit pictured has a 32Kb Eprom but the rom contents are the same as the one in the downloads below, but repeated twice.
<br>
* [[Dk'tronics Speech More Images|More Images and Close-up Views]]

== Reviews ==

* Review on Page 11 in [[Amstradbladet 1985, Issue 3]] (Danish)
* Advert/Announcement in [[:File:Amstrad Computer User8503 021.jpg|ACU March 1985]]

----

<gallery caption="dk'Tronics synth compared to the Amstrad SSA1">
image:Amstrad Computer User8507 014.jpg|(1/3)
image:Amstrad Computer User8507 015.jpg|(2/3)
image:Amstrad Computer User8507 016.jpg|(3/3)
</gallery>

== Other speech synthesizers for the CPC ==

* [[Amstrad SSA-1 Speech Synthesizer]] (Amstrad)
* [[MHT Speech Synthesizer]] (MHT Ingenieros)
* [[TMPI speech synthesizer]] (TechniMusique)

== Manual ==

* [[Media:Speech Programming - Edition 2 (Dk'Tronics) Manual.pdf|Speech Programming - Edition 2 (Dk'Tronics) Manual]] (pdf)
* [[Media:DK'Tronics Peripheral - Technical Manual (Edition 1).pdf|DK'Tronics Peripheral - Technical Manual (Edition 1)]] (pdf)
* [[Media:DKTronics_Speech_Synth_Docs.pdf|DKTronics Speech Synth Docs]] (pdf)

== Downloads ==

* [[Media:Speech Synthesizer (tape) (Dk'Tronics).zip|Speech Synthesizer (tape) (Dk'Tronics).zip]] (CDT for Emulators)
* [[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}}

[[Category:FutureOS]]
[[Category:Manual]]
[[Category:Music and sound]]
[[Category:Peripherals]]

Dk'tronics Speech Synthesizer

2025-03-07T20:36:47Z

Gamon81:

[[Dk'tronics]] Speech Synthesizer based on [[SPO256]]-AL2 chip.

== Overview ==

The Dk'tronics speech synthesizer came with the standard handbook which gave instructions for all Dk'tronics add-ons.

The speech synthesizer also had the classic Dk'tronics casing as all their CPC products had, with the exception of a fly-lead which could be connected to the stereo output of the CPC.

It also had two mono outputs for the supplied speakers, a volume control on the right hand side and the balance could be adjusted with a small screw-driver through a hole below the volume.

Two versions of the synthesizer were available. One where the software was supplied on a cassette and a second version with the software on an internal ROM within the unit.

When the ROM version was connected and working properly, it reported the message 'Speech ROM Ver. 1.1' on the screen.

Dk'tronics changed suppliers of the speakers more than once, so several different versions of the speakers exist, including one version with a swiveled bracket for wall or desk mounting.

== Software ==

The software supplied on cassette or ROM gave the user 11 new RSX (bar) commands to manipulate the SPO256
either directly or using it's 'text to speech' ability (with questionable success).

The commands available :

* |SPEAK - Loaded the ROM software, listed the commands and said the sentence 'DK'tronics speech synthesizer' (badly)
* |SPON - Used to turn on the read buffers interrupt
* |SPOF - You can guess what that one did yourself
* |FEED,n - Feed data directly into the speech buffer (up to 30 comma separated values between 5 and 63)
* |FLUS - Cleared both the speech and text buffers
* |SPED,n - Controls the speed of the text (n being a value between 0 and 15 where 0 is the fastest speed)
* |OUTM,1 - Redirected the print command's output to the speech to text converter
* |OUTM,2 - Redirect both the print and all other text (List etc.) to the converter
* |OUTM,3 - Redirected all text (as with 2), but also printed to the screen in parallel
* |LEFT,v - Reported the available memory left in the buffer (where v is a variable)
* |SAY, "text" - Was the standard command to send text to the synthesizer (where x is the text to be spoken)
* PRINT "`text`" - PRINT with reversed-single-quotes, works same as |SAY
* The cassette version seems to support only PRINT, the ROM version supports both PRINT and |SAY

However on the 464 the user was required to assign the text to a variable, whereas 664 and 6128 users could
use the command directly:

464 a$="Sample text": |Say, @a$

664/6128 |Say, "Sample text"

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.

The handbook also included programming examples in both BASIC and Assembly.

== Technical ==

Uses I/O port: [[I/O_Port_Summary|#FBFE]]

Port FBFEh READ:
N/A Status 1 (none, SP0256.Pin8 is not connected) ;SBY Pin, Standby
bit7 Status 2 (0=Ready to Receive Data, 1=Busy) ;LRQ Pin, Load Request
bit6-0 Not used (garbage, probably usually high-z)

Port FBFEh WRITE:
bit7-6 Not used (should be zero)
bit5-0 Allophone number
* A new allophone number can be send when Status.Bit7=0.
* Only lower 6bit of databus are connected in the dk'tronics version.
* The remaining upper 2bit are GNDed via a 0 Ohm resistor.

For details on the speech chip, see:

* [[SP0256]]
* [[SP0256 Voice Generator]]
* [[SP0256 Instruction Set]]
* [[SP0256 Allophones]]
* [[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).

== Software support ==
=== Games ===
* [[Alex Higgens World Pool]]
* [[Jump Jet]] (Anirog Software)
* [[Roland in Space]]

=== Serious Software ===
* [[FutureOS]] (limited support)

== Pictures ==

<gallery caption="dk'tronics Speech Synthesizer (Boxed)">

Image:Dk tronics speech 1.JPG|
Image:Dk tronics speech 2.JPG|
Image:Speechsynth.png|

</gallery>

<gallery caption="dk'tronics Speech Synthesizer (cassette)">

Image:Speech Software Tape - side B (Dk'Tronics).jpg|Fast Side
Image:Speech Software Tape - side A (Dk'Tronics).jpg|Slow Side

</gallery>

<gallery caption="dk'tronics Speech Synthesizer (464 ROM Version)">

Image:30-08.2009 001.jpg|
Image:30-08.2009 008.jpg|
Image:30-08.2009 014.jpg|

</gallery>

<gallery caption="dk'tronics Speech Synthesizer (464 Normal Version)">

Image:30-08.2009 101.jpg|
Image:30-08.2009 103.jpg|
Image:30-08.2009 108.jpg|
Image:SpeechSynthesizer_Front.jpg|Front
Image:SpeechSynthesizer_Back.jpg|Back
Image:SpeechSynthesizer_Left.jpg|Left
Image:SpeechSynthesizer_Right.jpg|Right
Image:SpeechSynthesizer_Top.jpg|Top
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:DKTronics Speech Diagram.jpg|SpeechSynthesizer recreated PCB (Gerbers are in download area)
</gallery>

<gallery caption="dk'tronics Speech Synthesizer (6128 ROM Version)">
Image:DKSPEECH_6128_Top.jpg|Top
Image:DKSPEECH_6128_Front.jpg|Front
Image:DKSPEECH_6128_Back.jpg|Back
Image:DKSPEECH_6128_PCB_Top.jpg|PCB Top
Image:DKSPEECH_6128_PCB_Bottom.jpg|PCB Bottom
</gallery>
* Note: The unit pictured has a 32Kb Eprom but the rom contents are the same as the one in the downloads below, but repeated twice.
<br>
* [[Dk'tronics Speech More Images|More Images and Close-up Views]]

== Reviews ==

* Review on Page 11 in [[Amstradbladet 1985, Issue 3]] (Danish)
* Advert/Announcement in [[:File:Amstrad Computer User8503 021.jpg|ACU March 1985]]

----

<gallery caption="dk'Tronics synth compared to the Amstrad SSA1">
image:Amstrad Computer User8507 014.jpg|(1/3)
image:Amstrad Computer User8507 015.jpg|(2/3)
image:Amstrad Computer User8507 016.jpg|(3/3)
</gallery>

== Other speech synthesizers for the CPC ==

* [[Amstrad SSA-1 Speech Synthesizer]] (Amstrad)
* [[MHT Speech Synthesizer]] (MHT Ingenieros)
* [[TMPI speech synthesizer]] (TechniMusique)

== Manual ==

* [[Media:Speech Programming - Edition 2 (Dk'Tronics) Manual.pdf|Speech Programming - Edition 2 (Dk'Tronics) Manual]] (pdf)
* [[Media:DK'Tronics Peripheral - Technical Manual (Edition 1).pdf|DK'Tronics Peripheral - Technical Manual (Edition 1)]] (pdf)
* [[Media:DKTronics_Speech_Synth_Docs.pdf|DKTronics Speech Synth Docs]] (pdf)

== Downloads ==

* [[Media:Speech Synthesizer (tape) (Dk'Tronics).zip|Speech Synthesizer (tape) (Dk'Tronics).zip]] (CDT for Emulators)
* [[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}}

[[Category:FutureOS]]
[[Category:Manual]]
[[Category:Music and sound]]
[[Category:Peripherals]]

Dk'tronics Speech Synthesizer

2025-03-07T20:13:48Z

Gamon81:

File:DKTronics Speech Diagram.jpg

2025-03-07T19:30:27Z

Gamon81: Gamon81 uploaded a new version of File:DKTronics Speech Diagram.jpg

Reverse engineering from a real Speech Synthesizer (Romless version).

File:DKTronics Speech Diagram.jpg

2025-03-07T19:21:59Z

Gamon81: Gamon81 uploaded a new version of File:DKTronics Speech Diagram.jpg

Reverse engineering from a real Speech Synthesizer (Romless version).

Dk'tronics Speech Synthesizer

2023-11-27T20:46:58Z

Gamon81:

[[Dk'tronics]] Speech Synthesizer based on [[SPO256]]-AL2 chip.

== Overview ==

The Dk'tronics speech synthesizer came with the standard handbook which gave instructions for all Dk'tronics add-ons.

The speech synthesizer also had the classic Dk'tronics casing as all their CPC products had, with the exception of a fly-lead which could be connected to the stereo output of the CPC.

It also had two mono outputs for the supplied speakers, a volume control on the right hand side and the balance could be adjusted with a small screw-driver through a hole below the volume.

Two versions of the synthesizer were available. One where the software was supplied on a cassette and a second version with the software on an internal ROM within the unit.

When the ROM version was connected and working properly, it reported the message 'Speech ROM Ver. 1.1' on the screen.

Dk'tronics changed suppliers of the speakers more than once, so several different versions of the speakers exist, including one version with a swiveled bracket for wall or desk mounting.

== Software ==

The software supplied on cassette or ROM gave the user 11 new RSX (bar) commands to manipulate the SPO256
either directly or using it's 'text to speech' ability (with questionable success).

The commands available :

* |SPEAK - Loaded the ROM software, listed the commands and said the sentence 'DK'tronics speech synthesizer' (badly)
* |SPON - Used to turn on the read buffers interrupt
* |SPOF - You can guess what that one did yourself
* |FEED,n - Feed data directly into the speech buffer (up to 30 comma separated values between 5 and 63)
* |FLUS - Cleared both the speech and text buffers
* |SPED,n - Controls the speed of the text (n being a value between 0 and 15 where 0 is the fastest speed)
* |OUTM,1 - Redirected the print command's output to the speech to text converter
* |OUTM,2 - Redirect both the print and all other text (List etc.) to the converter
* |OUTM,3 - Redirected all text (as with 2), but also printed to the screen in parallel
* |LEFT,v - Reported the available memory left in the buffer (where v is a variable)
* |SAY, "text" - Was the standard command to send text to the synthesizer (where x is the text to be spoken)
* PRINT "`text`" - PRINT with reversed-single-quotes, works same as |SAY
* The cassette version seems to support only PRINT, the ROM version supports both PRINT and |SAY

However on the 464 the user was required to assign the text to a variable, whereas 664 and 6128 users could
use the command directly:

464 a$="Sample text": |Say, @a$

664/6128 |Say, "Sample text"

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.

The handbook also included programming examples in both BASIC and Assembly.

== Technical ==

Uses I/O port: [[I/O_Port_Summary|#FBFE]]

Port FBFEh READ:
N/A Status 1 (none, SP0256.Pin8 is not connected) ;SBY Pin, Standby
bit7 Status 2 (0=Ready to Receive Data, 1=Busy) ;LRQ Pin, Load Request
bit6-0 Not used (garbage, probably usually high-z)

Port FBFEh WRITE:
bit7-6 Not used (should be zero)
bit5-0 Allophone number
* A new allophone number can be send when Status.Bit7=0.
* Only lower 6bit of databus are connected in the dk'tronics version.
* The remaining upper 2bit are GNDed via a 0 Ohm resistor.

For details on the speech chip, see:

* [[SP0256]]
* [[SP0256 Voice Generator]]
* [[SP0256 Instruction Set]]
* [[SP0256 Allophones]]
* [[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).

== Software support ==
=== Games ===
* [[Alex Higgens World Pool]]
* [[Jump Jet]] (Anirog Software)
* [[Roland in Space]]

=== Serious Software ===
* [[FutureOS]] (limited support)

== Pictures ==

<gallery caption="dk'tronics Speech Synthesizer (Boxed)">

Image:Dk tronics speech 1.JPG|
Image:Dk tronics speech 2.JPG|
Image:Speechsynth.png|

</gallery>

<gallery caption="dk'tronics Speech Synthesizer (cassette)">

Image:Speech Software Tape - side B (Dk'Tronics).jpg|Fast Side
Image:Speech Software Tape - side A (Dk'Tronics).jpg|Slow Side

</gallery>

<gallery caption="dk'tronics Speech Synthesizer (464 ROM Version)">

Image:30-08.2009 001.jpg|
Image:30-08.2009 008.jpg|
Image:30-08.2009 014.jpg|

</gallery>

<gallery caption="dk'tronics Speech Synthesizer (464 Normal Version)">

Image:30-08.2009 101.jpg|
Image:30-08.2009 103.jpg|
Image:30-08.2009 108.jpg|
Image:SpeechSynthesizer_Front.jpg|Front
Image:SpeechSynthesizer_Back.jpg|Back
Image:SpeechSynthesizer_Left.jpg|Left
Image:SpeechSynthesizer_Right.jpg|Right
Image:SpeechSynthesizer_Top.jpg|Top
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
</gallery>

<gallery caption="dk'tronics Speech Synthesizer (6128 ROM Version)">
Image:DKSPEECH_6128_Top.jpg|Top
Image:DKSPEECH_6128_Front.jpg|Front
Image:DKSPEECH_6128_Back.jpg|Back
Image:DKSPEECH_6128_PCB_Top.jpg|PCB Top
Image:DKSPEECH_6128_PCB_Bottom.jpg|PCB Bottom
</gallery>
* Note: The unit pictured has a 32Kb Eprom but the rom contents are the same as the one in the downloads below, but repeated twice.
<br>
* [[Dk'tronics Speech More Images|More Images and Close-up Views]]

== Reviews ==

* Review on Page 11 in [[Amstradbladet 1985, Issue 3]] (Danish)
* Advert/Announcement in [[:File:Amstrad Computer User8503 021.jpg|ACU March 1985]]

----

<gallery caption="dk'Tronics synth compared to the Amstrad SSA1">
image:Amstrad Computer User8507 014.jpg|(1/3)
image:Amstrad Computer User8507 015.jpg|(2/3)
image:Amstrad Computer User8507 016.jpg|(3/3)
</gallery>

== Other speech synthesizers for the CPC ==

* [[Amstrad SSA-1 Speech Synthesizer]] (Amstrad)
* [[MHT Speech Synthesizer]] (MHT Ingenieros)
* [[TMPI speech synthesizer]] (TechniMusique)

== Manual ==

* [[Media:Speech Programming - Edition 2 (Dk'Tronics) Manual.pdf|Speech Programming - Edition 2 (Dk'Tronics) Manual]] (pdf)
* [[Media:DK'Tronics Peripheral - Technical Manual (Edition 1).pdf|DK'Tronics Peripheral - Technical Manual (Edition 1)]] (pdf)
* [[Media:DKTronics_Speech_Synth_Docs.pdf|DKTronics Speech Synth Docs]] (pdf)

== Downloads ==

* [[Media:Speech Synthesizer (tape) (Dk'Tronics).zip|Speech Synthesizer (tape) (Dk'Tronics).zip]] (CDT for Emulators)
* [[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)

==Links==

*{{CPCPower|4724}}

[[Category:FutureOS]]
[[Category:Manual]]
[[Category:Music and sound]]
[[Category:Peripherals]]

File:SpeechSynthesizer PCB Disposition.jpg

2023-11-27T20:43:54Z

Gamon81: Components identification and position, related to rebuilt diagram.

Components identification and position, related to rebuilt diagram.

Dk'tronics Speech Synthesizer

2023-11-27T20:41:17Z

Gamon81:

[[Dk'tronics]] Speech Synthesizer based on [[SPO256]]-AL2 chip.

== Overview ==

The Dk'tronics speech synthesizer came with the standard handbook which gave instructions for all Dk'tronics add-ons.

The speech synthesizer also had the classic Dk'tronics casing as all their CPC products had, with the exception of a fly-lead which could be connected to the stereo output of the CPC.

It also had two mono outputs for the supplied speakers, a volume control on the right hand side and the balance could be adjusted with a small screw-driver through a hole below the volume.

Two versions of the synthesizer were available. One where the software was supplied on a cassette and a second version with the software on an internal ROM within the unit.

When the ROM version was connected and working properly, it reported the message 'Speech ROM Ver. 1.1' on the screen.

Dk'tronics changed suppliers of the speakers more than once, so several different versions of the speakers exist, including one version with a swiveled bracket for wall or desk mounting.

== Software ==

The software supplied on cassette or ROM gave the user 11 new RSX (bar) commands to manipulate the SPO256
either directly or using it's 'text to speech' ability (with questionable success).

The commands available :

* |SPEAK - Loaded the ROM software, listed the commands and said the sentence 'DK'tronics speech synthesizer' (badly)
* |SPON - Used to turn on the read buffers interrupt
* |SPOF - You can guess what that one did yourself
* |FEED,n - Feed data directly into the speech buffer (up to 30 comma separated values between 5 and 63)
* |FLUS - Cleared both the speech and text buffers
* |SPED,n - Controls the speed of the text (n being a value between 0 and 15 where 0 is the fastest speed)
* |OUTM,1 - Redirected the print command's output to the speech to text converter
* |OUTM,2 - Redirect both the print and all other text (List etc.) to the converter
* |OUTM,3 - Redirected all text (as with 2), but also printed to the screen in parallel
* |LEFT,v - Reported the available memory left in the buffer (where v is a variable)
* |SAY, "text" - Was the standard command to send text to the synthesizer (where x is the text to be spoken)
* PRINT "`text`" - PRINT with reversed-single-quotes, works same as |SAY
* The cassette version seems to support only PRINT, the ROM version supports both PRINT and |SAY

However on the 464 the user was required to assign the text to a variable, whereas 664 and 6128 users could
use the command directly:

464 a$="Sample text": |Say, @a$

664/6128 |Say, "Sample text"

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.

The handbook also included programming examples in both BASIC and Assembly.

== Technical ==

Uses I/O port: [[I/O_Port_Summary|#FBFE]]

Port FBFEh READ:
N/A Status 1 (none, SP0256.Pin8 is not connected) ;SBY Pin, Standby
bit7 Status 2 (0=Ready to Receive Data, 1=Busy) ;LRQ Pin, Load Request
bit6-0 Not used (garbage, probably usually high-z)

Port FBFEh WRITE:
bit7-6 Not used (should be zero)
bit5-0 Allophone number
* A new allophone number can be send when Status.Bit7=0.
* Only lower 6bit of databus are connected in the dk'tronics version.
* The remaining upper 2bit are GNDed via a 0 Ohm resistor.

For details on the speech chip, see:

* [[SP0256]]
* [[SP0256 Voice Generator]]
* [[SP0256 Instruction Set]]
* [[SP0256 Allophones]]
* [[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).

== Software support ==
=== Games ===
* [[Alex Higgens World Pool]]
* [[Jump Jet]] (Anirog Software)
* [[Roland in Space]]

=== Serious Software ===
* [[FutureOS]] (limited support)

== Pictures ==

<gallery caption="dk'tronics Speech Synthesizer (Boxed)">

Image:Dk tronics speech 1.JPG|
Image:Dk tronics speech 2.JPG|
Image:Speechsynth.png|

</gallery>

<gallery caption="dk'tronics Speech Synthesizer (cassette)">

Image:Speech Software Tape - side B (Dk'Tronics).jpg|Fast Side
Image:Speech Software Tape - side A (Dk'Tronics).jpg|Slow Side

</gallery>

<gallery caption="dk'tronics Speech Synthesizer (464 ROM Version)">

Image:30-08.2009 001.jpg|
Image:30-08.2009 008.jpg|
Image:30-08.2009 014.jpg|

</gallery>

<gallery caption="dk'tronics Speech Synthesizer (464 Normal Version)">

Image:30-08.2009 101.jpg|
Image:30-08.2009 103.jpg|
Image:30-08.2009 108.jpg|
Image:SpeechSynthesizer_Front.jpg|Front
Image:SpeechSynthesizer_Back.jpg|Back
Image:SpeechSynthesizer_Left.jpg|Left
Image:SpeechSynthesizer_Right.jpg|Right
Image:SpeechSynthesizer_Top.jpg|Top
Image:SpeechSynthesizer_PCB_Top.jpg|PCB Top
Image:SpeechSynthesizer_PCB_Bottom.jpg|PCB Bottom
Image:DKTronics Speech Diagram.jpg|Rebuilt Diagram
</gallery>

<gallery caption="dk'tronics Speech Synthesizer (6128 ROM Version)">
Image:DKSPEECH_6128_Top.jpg|Top
Image:DKSPEECH_6128_Front.jpg|Front
Image:DKSPEECH_6128_Back.jpg|Back
Image:DKSPEECH_6128_PCB_Top.jpg|PCB Top
Image:DKSPEECH_6128_PCB_Bottom.jpg|PCB Bottom
</gallery>
* Note: The unit pictured has a 32Kb Eprom but the rom contents are the same as the one in the downloads below, but repeated twice.
<br>
* [[Dk'tronics Speech More Images|More Images and Close-up Views]]

== Reviews ==

* Review on Page 11 in [[Amstradbladet 1985, Issue 3]] (Danish)
* Advert/Announcement in [[:File:Amstrad Computer User8503 021.jpg|ACU March 1985]]

----

<gallery caption="dk'Tronics synth compared to the Amstrad SSA1">
image:Amstrad Computer User8507 014.jpg|(1/3)
image:Amstrad Computer User8507 015.jpg|(2/3)
image:Amstrad Computer User8507 016.jpg|(3/3)
</gallery>

== Other speech synthesizers for the CPC ==

* [[Amstrad SSA-1 Speech Synthesizer]] (Amstrad)
* [[MHT Speech Synthesizer]] (MHT Ingenieros)
* [[TMPI speech synthesizer]] (TechniMusique)

== Manual ==

* [[Media:Speech Programming - Edition 2 (Dk'Tronics) Manual.pdf|Speech Programming - Edition 2 (Dk'Tronics) Manual]] (pdf)
* [[Media:DK'Tronics Peripheral - Technical Manual (Edition 1).pdf|DK'Tronics Peripheral - Technical Manual (Edition 1)]] (pdf)
* [[Media:DKTronics_Speech_Synth_Docs.pdf|DKTronics Speech Synth Docs]] (pdf)

== Downloads ==

* [[Media:Speech Synthesizer (tape) (Dk'Tronics).zip|Speech Synthesizer (tape) (Dk'Tronics).zip]] (CDT for Emulators)
* [[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)

==Links==

*{{CPCPower|4724}}

[[Category:FutureOS]]
[[Category:Manual]]
[[Category:Music and sound]]
[[Category:Peripherals]]

File:DKTronics Speech Diagram.jpg

2023-11-27T20:33:04Z

Gamon81: Reverse engineering from a real Speech Synthesizer (Romless version).

Reverse engineering from a real Speech Synthesizer (Romless version).