Posted this meta module of a Drawbar organ for SunVox by Blacbeard a while ago and here is Gilzad doing a small demonstration. So in this module you have all the drawbars to manipulate. 
Just wanted to point that out so you do not leave with the impression that it is one static instrument.
If you pay attention you can see the drawbars in the video.
To find Gilzad's and Blacbeard's meta module creations go to the Sub header Downloads above.

Gilzad is the one person that have been most active in developing advanced so called Meta modules for SunVox.
(For you that do not know Meta Modules is many modules brought together into one module for making all kinds of instruments and effect modules). Have the ones he made already in a downloadable bundle but have not included his latest creation something that do not exist in any other of the music making applications... a ten band equalizer!
This is one reason for this post but the other reason is that he recently released one song just using FM synthesis in combination with effects and it is an interesting study in what is possible using the FM synthesizer in SunVox and to take a look at the complexities in his Meta modules. 
Yes he have released the song with the archive that you can open in SunVox and study how he made the song 
and how he used his own mixing / mastering modules. 
Here is his own explanation that he gave on the SunVox forum:
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At SDC there was a competition where you could only use FM-Synthesis to create your song. So to me the challenge was to create a tune that would not sound like the typical OPL3-sound at all. Luckily SunVox's modularity helps a lot to create almost everything out of almost nothing. Night already was so nice to repost it on Soundcloud. Now it's time for me to share it along with the source file and some description here.

The Shakuhachi intro:
Not a sample. I accidently hit three successive keys on my keyboard and noticed that it sounded like the famous shaku-flute from the E-mu Emulator. So I sequenced them. It's just there to show off.  The audible clicks are not intended at all. For some reason the volume ramping in SunVox can't handle any softer steps here, so any changes on the volume (fade in) cause clicks.

The percussions:
The snare is three layered notes of an FM-synth that applies lots of modulation to its carriers. The tonal groove snare is played with a single/monophonic note. The hats are similar but have on own FM-synth. The BD is just no magic. You just need to have the carrier fade-out fast enough and soon you get to fiddle around with variations of a bass drum. A selfmade exciter creates the final formants and equalizes the sound color. Most of the time I focused on avoiding the typical brushy and tonal sound from typical FM-synths.

The piano:
It's a reduced module (only containing fm-synthesizers) of a [url]larger project[/url] (fm&non-fm synths) I'm still working on. The audible harmonic distortion doesn't come from a sample. It's just that Sunvox's engine creates more THD at 48KHz than at 44.1 KHz. I boosted the high frequencies of the FM-generators which makes the THD show up even more.

Mix/Master:
The tune contains most of the MetaModules I shared earlier for the mastering. Those are the 10-band EQ, the multiband limiter and the lookahead compressor. Using them I managed to create a very hot (loud) master. You can render the tune in Sunvox and watch the hard-limited waveform in any editor. I know I preach to not join the loudness war but for this Genre I found it very suitable to do so. So here's the result of the DR-Meter:

Nothing to be proud of, but this proves that SunVox can be loud.

The title:
When I was in Berlin I got the perfect inspiration to keep things simple enough so I could get this entry done in time.

The source file:
The source file manages to hit the limits of my sandy i7 (quadcore@2GHz). That's also a reason why I kept this tune so simple which is not usual for me. I'll be glad if you check the song on your machine. However, if your machine is weaker, you might want to try the lofi-version of SunVox.

Thanks for listening and I'll be glad to hear your comments.
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Here is the song file: 

Even though it is countless modules hidden inside the Meta modules the archive is only 235 kb.

Here is the new and updated package of all Gilzads excellent creations:

Exciter,  Gate,  Mid/side  Mux/Demux,  Multiband Limiter,  Vocoder, Lookahead Compressor, 
10 band equalizer.

Take a listen to the song:

So Gilzad have updated this metamodule for Sunvox so it works even better than before, some of the metamodules can be a bit process heavy just to take that into account if you are using a slower device...
Otherwise there is always a shock how efficient SunVox is on slower devices, 
it is truly a small marvel to behold!
Also updated the whole packet of metamodules with the new Multiband Limiter for your downloading pleasure here:

Gilzad's newly started Youtube channel:
https://www.youtube.com/channel/UCokoGqd9xY527BpALq1T4Mw?feature=watch

So here is the latest creation of Gilzad to help you with your mixing/mastering efforts...
So here is an deeper explanation that you can read  written by Mr Gilzad himself-

Lookahead Compressor

Background
A Compressor with a lookahead feature is able to duck the sound earlier than a triggering peak appears. You get virtually an attack time that goes below zero. This is done by delaying the signal that shall be compressed and by sidechaining the compressor with the same, but undelayed, signal. The later a signal arrives at the compressor's normal input, the earlier it will be compressed by its undelayed copy on the sidechain-input. One thing, that we could not do in SunVox, becomes possible that way: Hard Limiting.

Here's how a mastered output looks like with a bunch of Exciters, Multiband Compressors and final Compressors. As you can see, peaks still get through, although we've entered the stage of hypercompression already:

But if we exchange the last master compressor by a Lookahead Compressor, we get a boosted volume and all the peaks are limited:

What is it good for?

• Brickwall Limiting / Hard Limiting - Applying this, you can avoid that single peaks of your tune steal your headroom.
  
  
• Less risk of clipping - If you'd render a song in SunVox, you'd usually choose a safe output volume that would be rather quiet. Else you'd risk to have a distortion at some arbritrary point. The limiter avoids clipping even at high loudness.
  
  
• Closer to final mastering - In competitions, where internal Maximizers or Hard Limiters make songs sound richer, you won't stay behind with SunVox anymore. Talking from a design perspective, not encouriging you to join the Loudness War.
  
  
• Punchy sound - Especially for electronic music this type of limiting can add some audible punch and pleasant pressure to your song.
  
  

The example file
The example file shows what exactly the Lookahead Compressor consists of and how it's built. You'll see an Amplifier that is connected to a compressor and to an Echo module. And you'll see that the Echo module is connected to the Compressor, too.

What is happening
The Amplifier feeds the Compressor's sidechianing-input. So there's no latency between the Amplifier (labeled 'Input') and the Compressor's sidechaining input. Furthermore the same Amplifier is attached to an Echo module (labeled 'Lookahead') and this Echo module is attached to the Compressor's normal input. The Echo module is used to add latency. So between the Amplifier and the Compressor's normal input, there is some latency. In this example I've set it to 2 ms as I found it works best for hard limiting. Now, whenever a peak from the Compressor's sidechaining-input exceeds its threshold, the delayed signal will be attenuated. As an example, a bassdrum reaches the sidechaining-input first and 2 ms later it will arrive at the compressor's normal input. This way the normal input will be ducked/attenuated earlier. That is by the time the peak arrived at the sidechining-input. That's looking ahead. The compressor knew what was gonna happen before it actually happened.

The demo file
This time the bypass feature is in the demo file, where you can simply unmute the "COMPARE" DSP. Doing this, you'll exchange the Lookahead Compressor by a usual Compressor. You'll notice how the usual Compressor sounds quieter and still its peaks lead SunVox's master output into clipping. Muting the "COMPARE" DSP again, you'll see how a song (well, just a pattern) is being played back together with a complete mastering chain at full loudness. If you feel like, render out the song and see how a maximized waveform appears in your audio editor.

The SunSynth module
The SunSynth module offers all the controls of a usual Compressor plus one for the lookahead feature. Since the inner compressor's side-chaining input is occupied now, it won't be available for anything else anymore (and Metamodules don't route different inputs through anyway). You might notice that these hard limiting configurations have a couple of drawbacks, too. One is the added latency. Due to some buffering the native Compressor adds some latency of 1 ms already (totally usual), but adding the lookahead feature will cost even more latency. That's because the DSP can't look into the future, it'll only buffer the sound a bit longer and compare to tha past. Another drawback is, when you hear clicks and little distortions here and there, which is just a natural case. If you did this with the Maximizer in Renoise, you'd hear similar issues and the Fast Lookahead Limiter by Steve Harris will also act like that, if you push it too hard. In such cases you have to use the Compressor carefully. Luckily we are able to change the attack an release time here. One of my tricks is to compress dull parts with soft parameters and bright parts with hard parameters. By automating the Compressor through the timeline. The idea is, that you won't hear the clipping artifacts in bright moments anyway.

Thanks for reading and downloading.

gilzad

Download Gilzads Lookahead Compressor and his other excellent Metamodules here:

Gilzad has been a recent force in the Sunvox community and has won the hearts of many Sunvox users by using his knowledge of audio, building up very useful effects in something called metamodules inside Sunvox-
Sunvox is a modular Daw / working environment and since the last big update a new module came into play which allowed users to pack the other modules inside the metamodule and make them into a new module.
The great thing about the metamodule is that you can build complex instruments mixing synthesizers / samplers / and effects, 
or do what Gilzad has been doing, build really useful mixing / mastering tools...

So the decision was made on a rainy day to meet over the internet and discuss him and what he has been doing.
Also I have a confession to make,
to make him comply to this interrogation I am sorry to say that I had to stoop so low as to threaten to eat his cat...