yamaha_dx7_rom_disassembly
fluidsynth
yamaha_dx7_rom_disassembly | fluidsynth | |
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4 | 26 | |
60 | 1,709 | |
- | 1.8% | |
7.1 | 7.4 | |
30 days ago | 4 days ago | |
Assembly | C | |
- | GNU Lesser General Public License v3.0 only |
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yamaha_dx7_rom_disassembly
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Reverse-engineering the Yamaha DX7 synthesizer's sound chip from die photos
I wrote the article mentioned by Ken: https://ajxs.me/blog/Yamaha_DX7_Technical_Analysis.html
I've unwittingly become a bit of a Yamaha FM Synth historian!
Here are some other contributions to reverse-engineering the DX7:
A fully documented disassembly of the DX7 ROM: https://github.com/ajxs/yamaha_dx7_rom_disassembly
A new firmware ROM that makes the DX9 function like a DX7:
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Fixing a 30 year-old Roland synthesizer Bug
I browsed through the repository as discovered by colejohnson66 downthread https://github.com/ajxs/yamaha_dx7_rom_disassembly. This is an example of superb, meticulous, lovingly documented work. The kind of thing you don't see every day, congratulations. The attention to detail is really just chef's kiss, starting with a really good repository name (a small thing, but still), continuing through clear and apparently comprehensive documentation of what you did and why, then on to beautifully formatted and commented assembly language (much better than the original source code I'd wager) with coherent and consistent paragraph commenting a particular delight, and finally (and very importantly) dedication to making sure others can reproduce your results and generate a matching binary too. There are likely to be other things of beauty in there I have forgotten to highlight, it's just that good. Oh the FAQ of course, what a great FAQ. Really I am being very wordy for someone that's lost for words.
BTW, I love retro computing too, this is my best attempt so far in the field https://github.com/billforsternz/retro-sargon. I aspire to similar standards to your good self, but I'm not there yet.
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Patching an Embedded Synthesiser OS from 1996 with Ghidra
Very cool! This is really great work! It's awesome that there's been so many synthesiser related topics on Hacker News lately. I did a similar project myself to disassemble, and fully annotate the firmware for the Yamaha DX7: https://github.com/ajxs/yamaha_dx7_rom_disassembly
The biggest hint I could give anyone looking to disassemble a synthesiser operating system is to direct your attention towards the code processing individual MIDI messages. The code is invariably is huge mess, however you'll be able to very quickly identify the operating system's core functions, since the corresponding SysEx parameter numbers clearly identify what functionality you're looking at.
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Yamaha DX7 reverse-engineering, part III: Inside the log-sine ROM
Anthony just released his annotated DX-7 ROM listing:
https://github.com/ajxs/yamaha_dx7_rom_disassembly
fluidsynth
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Suggestions on how to improve FluidSynth
I'm trying to code a fix for it here: https://github.com/FluidSynth/fluidsynth/issues/1282
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Show HN: UPiano, a Piano in Your Terminal
Hello HN!
This is a Python app I've built for fun, while learning the Textual library, it's a piano/synthesizer app that you can play with the keyboard + mouse.
You can see a demo video of it here: https://www.youtube.com/watch?v=0VXit110PcA
You need to install FluidSynth before using it: https://www.fluidsynth.org/
It uses the Python bindings pyFluidSynth library: https://github.com/nwhitehead/pyfluidsynth
- No audio output in Ardour6
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Best resources to integrate instrument sounds into a game?
There’s a ton of free synths / sound engines out there. I would start by seeing if you can integrate one of those. FluidSynth (https://www.fluidsynth.org/) is one of the more popular ones. It supports audio samples in the SoundFont format, and there’s a ton of free SoundFont sample banks out there you can find—you can find a bunch of different recommended sample banks, and my personal choice is GeneralUser GS. “GS” is a Roland extension to GM that includes additional instruments and percussion kits.
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Timidity++ sound exactly like Windows Media Player
With all the programs you tried, it's hard to believe you missed Fluidsynth. Or maybe you tried it and it didn't work.
- apt list is showing different results for 2 different systems
- Trying to connect keyboard with laptop and play through headphones
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VLC+MIDI issue: When playing any ".mid", drums are replaced with non-percussion instruments (e.g. piano) sounds
FluidSynth releases are available here: https://github.com/FluidSynth/fluidsynth/releases
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How to build/run 1oom with soundfont (fluidsynth) support on Windows
https://github.com/1oom-fork/1oom/commit/e3cfc03885792d35e3bfe56d2f78954d84f5fe55 - *.dll +https://github.com/FluidSynth/fluidsynth/releases
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GitHub - jcard0na/haxo-hw: Haxophone, an electronic musical instrument that resembles a saxophone
They are using https://github.com/FluidSynth/fluidsynth directly on the raspberry and the bom doesn't list an extra chip.
What are some alternatives?
dexed - DX7 FM multi plaform/multi format plugin
TinySoundFont - SoundFont2 synthesizer library in a single C/C++ file
zynaddsubfx - ZynAddSubFX open source synthesizer
OmniMIDI - A software MIDI synthesizer for professional use.
opl3_fpga - Reverse engineered SystemVerilog RTL version of the Yamaha OPL3 (YMF262) FM Synthesizer
sfizz - SFZ parser and synth c++ library, providing a JACK standalone client
Sonic Pi - Code. Music. Live.
Musical Artifacts - Helping to catalog, preserve and free the artifacts you need to produce music.
sim68xx - Simulators for 6800 based CPUs
Linux-SonivoxEas - Sonivox EAS for Linux and Qt
yabridge - A modern and transparent way to use Windows VST2, VST3 and CLAP plugins on Linux
Camomile - An audio plugin with Pure Data embedded that allows to load and to control patches