Xhun Audio RawPrime : an original synthesis concept, established on... Aliasing (on purpose) !

[stoopicus]

This Device 100% produces sound *exclusively* by using aliasing tones/partials.

What you hear in the Example A, Example B, Example C audio demos is not a wavetable with its aliasing, or a multisample with its aliasing, or a generated waveform with aliasing, etc.

What you hear is produced *entirely* by "pure" aliasing only.

Wait, to make sure I understand, so basically you're generating the aliased harmonics and then discarding the fundamental tone, and synthesizing from those?

That's... awesome. I love this idea

[Korg Supporter]

Ok, let's try to move the first steps in order to define what this Device actually is...

As well as for the Yamaha OP- / YM- chips, in this Device all starts with a "wavetable" stored in memory.

Note : I said "wavetable", not "multi-dimensional wavetables". It means a single waveform stored in memory. Remember, we have to stay cheap as in 1976 !

Or better, YM- had a 8-bit "quarter of sine wave period" stored, and it reconstruct a sine wave period by recombining it 4 times, resulting in a 9-bit, full period wave.

But the similarities with YM- stop here. Yamaha uses 2 of that sine wavetables in phasemod (or additive) in order to generate partials.

Instead the Device uses two (7-bit, full period) sine wavetables (separately) in a different, original fashion...

Let's start from the... top. What's possible to achieve with this new synthesis approach ?

Here are two preliminary examples of what this Device is able to produce.

The most important thing to consider here is :

- the first audio demo uses only 2 sine waves to produce the entire bass line.

- the second audio demo instead uses only 1 sine wave to produce each voice.

Both audio demos use a delay processor (included). Audio demo A makes use of the analog filter (included).

Audio demo A : Using only 2 sines per voice (#1 voice in total, monophonic)
https://soundcloud.com/xhunaudiounreleased/example-a

Audio demo B : Using only 1 sine per voice (#2 voices in total, polyphonic)
https://soundcloud.com/xhunaudiounreleased/example-b

Wavetable, oh so like PC Engine and SCC. It is known in Japan as waveform memory synthesis.

[A-Grade_Audio]

https://www.kvraudio.com/product/mr-ali ... t-piz-here

If it's anything like insertpizhere's amazing Mr Alias, which I dearly love, from 15 years ago I will buy this
I love IronAxe and ResonHeart, of course!

I still use the "Pro" version of it to this day. Such a fun noisemaker.

[rj0]

... and all these years we've been struggling to reduce aliasing. Sheesh!

[xhunaudio]

Indeed : we fight aliasing all the time, but at some point someone has to listen to his reasons.

[xhunaudio]

Wavetable, oh so like PC Engine and SCC. It is known in Japan as waveform memory synthesis.

Well, no. Konami SCC is a great vintage chip, but it has nothing to do with the Device.

SCC is a wavetable/rompler system, the Device is a completely different beast.

I'm calling it the "Device" with capital "D" so it's clear I'm referring to the XA "Unreleased" new synthesizer.

[xhunaudio]

Wait, to make sure I understand, so basically you're generating the aliased harmonics and then discarding the fundamental tone, and synthesizing from those?

That's... awesome. I love this idea

Exactly. The 7-bit sine wavetable I mentioned before has to be considered not much more than a "trigger" for the whole system.

So yes, what you hear in the 3 audio demo examples (and all partials in general in this Device) is only from aliasing. It's the central idea of it. This is why I said "let the aliasing do the dirty job of generating harmonics, for free".

As I said before, this Device is not a "lo-fi" synthesizer for producing just aliased sounds/tones, but is meant to be a so-called "AAA" synthesizer, using "aliasing raw material" as its sound source.

Also - I'm going to explain that later on - the D / A hybrid tone generator (let's call it a "macro-oscillator") is much more complex. It performs subsequent DSP operations with all that "aliasing raw material"...

[Tj Shredder]

I can’t avoid to be excited and curious…

[xhunaudio]

Completing the factory presets library, among other things.

Specially for 80s / 90s movies lovers here's Example D, produced with only eight (8) sine waves in total.

Or better : what you hear is made exclusively by the sole aliasing produced by eight (8) 7-bit sine waves :

https://soundcloud.com/xhunaudiorawprim ... -deep-note

[Nielzie]

I did forsee this a long time ago, see my signature

[Nielzie]

https://www.kvraudio.com/product/mr-ali ... t-piz-here

If it's anything like insertpizhere's amazing Mr Alias, which I dearly love, from 15 years ago I will buy this
I love IronAxe and ResonHeart, of course!

I still use the "Pro" version of it to this day. Such a fun noisemaker.

Same here, the Pro version absolutely aliasly rocks

[El°HYM]

I did forsee this a long time ago, see my signature

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No band limits, aliasing is the noise of freedom!

[martiu]

I did forsee this a long time ago, see my signature

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No band limits, aliasing is the noise of freedom!

[El°HYM]

I did forsee this a long time ago, see my signature

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No band limits, aliasing is the noise of freedom!

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aliasing plugin owner

Have been an Aliasing plugin owner for quite some time myself.

[Nielzie]

Nothing wrong with aliasing, it brings lovely nasty character to sounds.