The main synth and the pad which comes in a few seconds later. I am using Serum TAL and a the Prophet from Arturia.

How do I make this one?

 

simple vocal/voice AAAAAAAAAAAAAAAAAAAAAAA with vocoder

 

If I'm not totally wrong.
Your best attempt (with given tools ) would be using the DAW’s (which you by the way didn't tell ) record function save your sample. Use the sample with "AAAAA" in Serum use Hyperdimension. Some reverb.
Or.
2. If you got no Microphone . Sample any speaking from Youtube. And same as before. Serum. Sample. Hyperdimension reverb. Maybe a bit of Chorus.

3. That’s the royal route.
Record. Vocoder. Be happy
Something like

https://www.pluginboutique.com/product/2-Effects/54-Vocal-Processing/4413-VocalSynth-2
https://www.pluginboutique.com/product/2-Effects/43-Vocoder/1852-Vocalizer-Pro
https://www.pluginboutique.com/product/2-Effects/43-Vocoder/818-MVocoder
(https://tal-software.com/products/tal-vocoder)... you wrote TAL but that’s a company with more than one product. so I´m not sure if you got this as well .

 

If thats the case wouldnt it be possible to just find any type of choir sample or library and use a vocoder over it?

 

Just to be clear, is it this sound? It has a very cembalo-esque timbre to it. Nice!
I used a simple SineToSaw oscillator (in the free Vember Surge) and boosted some nasal mids + reverb + some FM layering (highpassed to get the bitcrushed feel). The bass is a pretty straight-forward lowpassed supersaw.

 

Last edited: Dec 29, 2019

I don't think he's asking about the vocal tag. And what comes after 0:05 are chords from what sounds like an extremely wet/reverberated E-Organ with single notes from a soft bell pad and a grand piano. The bell pad triggers only on the 1, and the notes from the grand are 2nd and 3rd count. So it's 3 different patches/tracks more than likely.

 

Last edited: Dec 29, 2019

Chapeau, pretty impressive.
(For all there is a zippyshare link )(which doesn't work in Germany) (VPN helps )