INSIDIOUS 6581

Emulation of the MOS SID 6581: the C64 sound chip.

(68 Votes)
1.2.3 (Updated 2 months ago)
1.1MB
May 30, 2015
Reaktor 5 or lower

DESCRIPTION

Helpful videos:
https://youtu.be/w_o1x2BQYCo An overview of the GUI.
https://youtu.be/q-gvpAawSGA A run-through of the presets of v1.1

This ensemble is a near-perfect emulation of the extraordinary Commodore 64 sound chip. Included are all features of the original hardware:
* Three channels with Triangle, Square/PWM, Sawtooth, Noise and combined oscillators.
* Ring modulation and hard sync.
* The classic SID saturating filter that is incredibly important but missing on most emulations.
* LFOs and envelopes for pulse width, pitch, amplitude and filter cutoff.
* Step table at up to 50Hz for that genuine sound.
* Optional quantization clock to restrict modulation updates to 50Hz or 60Hz as used in most games, or 100Hz or 150Hz as used in modern SID tunes and by Martin Galway in the Wizball theme.

No attempt is made to create a better SID. No features are enhanced or improved. This is not the usual 'SID-like' or '8-bit style' synth. This is an attempt to recreate the real thing as closely as possible with the most user-friendly interface possible. Included are multiple presets taken directly from Commodore 64 games by dumping out the hardware registers during playback.

The SID Filter emulates the characteristic saturation and distortion present in the real hardware, which is the main feature that distinguishes most emulations from the real thing. I have spent a long time using an oscilloscope to view the output from multiple real SID chips alongside Insidious 6581 to ensure that the output is as close as possible.

The example sound is entitled "For All It's Worth" and was created by me using multiple instances of only this plugin. All of the sounds are included in the ensemble. It was created for the free "Summer of SID" album, available at https://c64audio.com/pages/summer

You can hear another example with my recreation of Chris Huelsbeck's title screen music from the game R-Type at https://www.youtube.com/watch?v=Vt0K8vM_4HQ.

I have a blog about the creation of this ensemble at http://insidious6581.blogspot.co.uk

As of v1.2.2, this ensemble uses a component of Simple Arp by salamanderanagram.

Changes v1.2.3 (2017/12/16):
* Added a PWM position display that shows the final combined PWM value.
* Remade the LFO Fade/Delay implementation to take into the account the starting phase of the waveform, making it more flexible and seamless.

Changes v1.2.2 (2017/12/10):
* Added new play mode options: Solo, Legato, and Live arp. With live arp you can note play those 8-bit bubbly chords live.
* Added new presets from my track 'For All It's Worth'.
* Simplified the top-most channel routing.
* The whole portamento section has been replaced. Portamento is now logarithmic instead of linear using the Smooth module from 2-OSC, but does not produce gate clicks like before.
* Fixed a bug in the table looping where an incorrect waveform could be set on a zero entry.

Changes v1.2.1 (2017/11/19):
* The waveforms are now output at the correct bit depth according to the hardware specs.
* The ADSR wave is now quantised to 8-bits.
* The Filter automation parameters had the same IDs as channel 3's parameters, so were being hidden.
* Removed the full channel switch if the waveform is set to nothing. Now only pressing mute button will completely stop processing. Fixes a potential problem with program changes.

Changes v1.2 (2017/11/11):
Oscillators
* More accurate root waveforms. The tone and saturation now perfectly match the real hardware.
* Much improved combined waveforms, especially at higher frequencies.
* Vastly more accurate filter, tweaked by matching waveforms using an oscilloscope connected to real SID chips. It is almost indistinguishable from the real thing.
* Root pulse width value now allows the full 0-100% rage instead of 0-50%.
* Pulse width is quantised to 4096 values like the real chip.

Table
* Table loop start and end points. Tables can be simpler and have an attack phase.
* Increased pitch range.

User Interface
* New custom graphics
* Control sensitivity adjustments
* Improved the modulation envelope graphs and added a graph to the main volume ADSR.
* Added a MIDI channel parameter to the filter to set the channel used for its LFO Key Follow and envelope triggering.

General
* Better CPU usage. Also, muting a channel will completely stop it from using any CPU.
* Added volume ADSR to the automatable parameters.
* Added support for Bank Select for better patch organisation.

Bug fixes
* Fade time now matches the specified value correctly.
* Fixed a clicking that could occur on triggering a note.
* Switched from using custom MIDI data parsing to using Reaktor's built-in MIDI modules for reduced complexity.

Changes v1.1 (2015/06/09):
* Fixed an issue with the redisplay of the LFO waveforms after changing programs.
* Added a feature to clock the modulation at 50Hz or 60Hz to emulate C64 games more closely and give a slightly more '8-bit' sound.
* Added the ability to hard sync the combined waveforms.
* Added presets for the R-Type title music MIDI file.
* Added a MIDI file for the R-Type title music.

COMMENTS  (52)

Mike Clarke
1 month ago
jes: This ensemble is no different to any other ensemble in operation, so either you're using the Reaktor Player and not the full version or there is a problem with your Reaktor installation. Marco Muzzi: I've seen that error and I thought I'd got it to go away. The error itself is bizarre (another Reaktor bug?), so I'll shuffle some things around and see if I can kill it.
Marco Muzzi
1 month ago
Thanks Mike! Another question: when I use a Program Change plugin in Ableton, the Event Merger gives an error (http://www.fb.pics/image/fDqf) and the presets change in an very odd way. I was also wondering how to tell Reaktor whether to change snapshots of the ensemble or of the single modules.
jes Nørholm
1 month ago
keeps saying it works in demo for a ½ hour, using reaktor 6
Mike Clarke
1 month ago
Marco Muzzi: It looks like that's a bug in the standalone Reaktor app. It works fine in the VST. I've got around it though and it will be fixed in v1.2.4.
paul hesford
1 month ago
Wow, This is stunning, If you love the 8bit sound of the Commodore 64, GET THIS BEAST... the Authenticity is amazing and you can now have a SID Orchestra in your DAW of choice... 64 channel SID anyone...10/10..
Marco Muzzi
1 month ago
I love this plugin! Just one problem, I have the 1.2.3 version and I can't use the Live Arp mode with my midi keyboard, it works only with the laptop keyboard. Any ideas why?
Markus Kaarlonen
2 months ago
Absolutely loving this, thank you! I don't think there's any way to sync the table speed to host tempo, probably because it breaks the paradigm of authenticity (or if there is, sorry for missing it...)? Anyway, I couldn't resist adding it myself, so I extended the speed knob range to -32 (to keep the interface intact and not to break any existing functionality), and added some simple "code" in the AutoCounter macro. Now the negative values correspond to note lengths of 1/x.
Paul Majchrowsky
2 months ago
Is there any tutorial how to made own music via Reaktor step by step like Rebirth ? I tryed but can play live and only one channel, rest 2 channles not playing... or how can i download your demo ?? thanks and good work with demo music :)
yerry feldstein
3 months ago
Number 5 is alive! Many Thanks ! Mike Clarke
David Coffin
3 months ago
WOW, this is really great stuff, fabulous results from randomizing…and I didn't even LIKE game noises (or games, for that matter:) back in the day. But I sure like these, and twiddling knobs for funny noises, hmmm. Thanks!!
Glenn Wiorek
3 months ago
Wonderful
phillip bova
3 months ago
Sweet!!! Using this on current project starting tomorrow ;)
Mark Knight
3 months ago
Mike, you're the best - thank you very much!
fabio marinelli
5 months ago
this is my youtube channel... All my c64 covers are made with insidious 6581 https://www.youtube.com/channel/UCclk8zg7XkGjuo8OHcRYrzg
Enrico Bruttomesso
8 months ago
Thanks a lot for this fantastic ensemble Mike!
fabio marinelli
1 year ago
great!!! I did not understand how to set PWM...
Michael Pilyavskiy
1 year ago
great!
Johan Smolinski
1 year ago
Update to below: I found out that the MIDI channel setting is located on the panel for each SID channel. My real problem was that Ableton Live is merging all MIDI in channels to out channel 1. That seems to be how it works, unless using the plugin called External Instrument, which unfortunately is not included with the Intro version. Bummer! That really should be a core function... I mean, playing multi-timbral VST:s is among the first things I require of a DAW. Anyway, Insidious sounds fantastic! Really cool that you can do such a thing with Reaktor.
Johan Smolinski
1 year ago
How can I set the MIDI channels to SID channels as suggested in the readmes for Delta and R-Type MIDI files?
Serhat Kahveci
2 years ago
Can't wait to use this. Thanks, Mike!
Matthew Friedrichs
2 years ago
Fantastic emulation! I found a small midi bug in Reaktor 6 where the ST Gate module would not trigger the filter modulation at all. Simply moving this module into the filter modulation macro then connecting it to the LFO and ENV gate inputs directly fixed that right up. I hope to see you port the individual elements of this .ens to blocks! :)
Jorge Rodriguez
2 years ago
Love this thing. Thank you so much!
Sam Mover
2 years ago
https://soundcloud.com/andreigorlov/epilogue-no-future
GG.G SakabeaT
2 years ago
i come back here to say thxagain for that ens....fabulous......friggin'awesome dude!!!!
GG.G SakabeaT
2 years ago
thx
GG.G SakabeaT
2 years ago
Awesome
Josep Mª Ricou
2 years ago
Congratulations This is excellent work.
Dana Fortier
2 years ago
Had to give props for this fantastic ensemble.
David Sullivan
2 years ago
I always thought you were a clever-clogs Mike and this proves it. Genius.
Carlo Del Prato
2 years ago
Congratulations and thanx for sharing...timeless sound.
Jussi-Matti Salmela
2 years ago
You sir, are a gentleman and a scholar!
Lee Tobin
2 years ago
This is fantastic. My goto SID emulation now. Thanks!
Neil Baxter
2 years ago
Brilliant!
Daniel Hogan
2 years ago
5 Stars for the Demo Tune. :) Now for the download ...
benjamin bassenonville
2 years ago
Excellent work for an excellent sound ! Instant fun !!!
Quinn Hanratty
2 years ago
thank you, this is great!
Peter Christiansen
2 years ago
This is excellent work. Sounds quite authentic to me.
Paule
2 years ago
.. and another 5-star vote 4U
Malte Klima
2 years ago
That is really the sound of the C64! Thanks for your great work!!!
Goran Podrugovic
2 years ago
Thank You, really sweet!
Ng Mui
2 years ago
Wow I used to love R-Type, so many hours spent on that game xD
DANIEL FISCH
2 years ago
thanks. C64 reloaded!
Aynsley Green
2 years ago
Dang, I can't tell the difference between the original Delta track and this emulation, very impressed.
Frank Neumann
2 years ago
Wouw!! Sounds very, very good, best emulation i ever heard!
Dieter Zobel
2 years ago
much thanks
Mark Knight
2 years ago
Can't wait to try this tomorrow. Thanks for this Mike. Need to start building a community library of well known sounds then ;)
Tim Wright
2 years ago
Top stuff! Great fun... :oD
ZooTooK
2 years ago
Great work! Love the Koyaanisqatsi on chip!
rick scott
2 years ago
I owned a SID way back. Great fun. This gives me flashbacks. Well done! :-) (
Paule
2 years ago
Is this the real sound stuff for Marcus Friedrich, the choir director from Leipzig; isn't it?
Ng Mui
2 years ago
Not bad, sounds very commodore!
arachnaut
2 years ago
Great! Fun stuff!
now