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Lyrebird Recreation Project

celcius1

Hi Guys,

It's Paul from Paul's Engineering space, and I'm adding another project to the variety I am working on.  As you can tell from the title I am recreating a project from Electronics Australia 1981 October through 1982 January issues.  Alot of this work has involved finding modern equivalents of the chips used in the project, I have been able to either find modern versions, or in the sense of the tone generator, I have recreated it as an oscillator board, as the original chip is no longer made, and the purpose of this project is to recreate it using currently available hardware.

Departing from the original piano's design, I have designed a mainboard, utilising PCI-e connectors, so various parts of the piano can be on daughterboards, I'm only using PCI-e connectors as they are readily available and cheap!  But will also permit changes to design in a way that once I have fully completed the initial project and have defined the projects standard.  The purpose of going down this path, it will give other individuals, the opprtunity to make there own wave shaping boards, and get different sounds out of the piano.

This project has been a huge undertaking and is just as big as my extruder project.

So feel free to discuss with me my efforts so far, I'll have video published once I have finished designing the new mainboard.

Talk Soon

Paul

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  • Hey Guys,

    I'm considering putting a website together to put a lot of the main updates on, even make available the source documentation the project is based on.  Including a link to the GitHub - Celcius1/Old-Projects-become-New: Electronics Projects from the 60's to 90's redone for the modern era.  But this is the first in a series of projects where I will go through, and modernise old projects.  I have a few projects in there already in progress, but I thought I'd make the Lyrebird Project the inaugural project in the series.

    So to summarise, I'm about 80% complete on the mainboard for the Lyrebird, it utilises 4 x PCI-E slots (98 pin) & 4 x PCI-E slots (164 pin).  The 98 pin slots, are specifically for the tone source boards, and have 7 control lines between them if people want to use more than one board working together for the tone source.  The 164 pin slots, are where the wave shaper boards go, 73 pins are for the source tones from the tone generator boards, and another 73 are connection to the piano keys, so to keep all the wave shaping circuitry on the daughter boards for maximum, customisation, only downside due to sheer number of connections, there is only 3 control lines between these four slots for combining wave shaping board capabilities.  Instrument selection as a result will be limited to soft touch selection via a header off of the daughter board. As the original Lyrebird had about 4 to 5 instrument selections, so being that the instrument creation is limited to the wave shaping board, I'd made the design decision to limit it the daughter board, but unlike in the original design where it is physical switches, I'll use digital electronic control and soft touch buttons instead.

    Also departing from the original design, the main board will house the main power regulation circuitry and I have also put a Class D amp in for the audio, original design provided a headphone out, and line out, I'm implementing a Class D Amp to drive a speaker and one to drive a sub, to give the bass notes, that extra needed punch for sound and clarity.  I'm considering also replacing the volume control with a rotary encoder, instead of a traditional potentiometer.

    Keep an eye out on my channel for the video regarding this project as I will do one once I have completed the main board.

    Talk Soon

    Paul

Reply

  • Hey Guys,

    I'm considering putting a website together to put a lot of the main updates on, even make available the source documentation the project is based on.  Including a link to the GitHub - Celcius1/Old-Projects-become-New: Electronics Projects from the 60's to 90's redone for the modern era.  But this is the first in a series of projects where I will go through, and modernise old projects.  I have a few projects in there already in progress, but I thought I'd make the Lyrebird Project the inaugural project in the series.

    So to summarise, I'm about 80% complete on the mainboard for the Lyrebird, it utilises 4 x PCI-E slots (98 pin) & 4 x PCI-E slots (164 pin).  The 98 pin slots, are specifically for the tone source boards, and have 7 control lines between them if people want to use more than one board working together for the tone source.  The 164 pin slots, are where the wave shaper boards go, 73 pins are for the source tones from the tone generator boards, and another 73 are connection to the piano keys, so to keep all the wave shaping circuitry on the daughter boards for maximum, customisation, only downside due to sheer number of connections, there is only 3 control lines between these four slots for combining wave shaping board capabilities.  Instrument selection as a result will be limited to soft touch selection via a header off of the daughter board. As the original Lyrebird had about 4 to 5 instrument selections, so being that the instrument creation is limited to the wave shaping board, I'd made the design decision to limit it the daughter board, but unlike in the original design where it is physical switches, I'll use digital electronic control and soft touch buttons instead.

    Also departing from the original design, the main board will house the main power regulation circuitry and I have also put a Class D amp in for the audio, original design provided a headphone out, and line out, I'm implementing a Class D Amp to drive a speaker and one to drive a sub, to give the bass notes, that extra needed punch for sound and clarity.  I'm considering also replacing the volume control with a rotary encoder, instead of a traditional potentiometer.

    Keep an eye out on my channel for the video regarding this project as I will do one once I have completed the main board.

    Talk Soon

    Paul

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