SUBscription Synth 4+

AUv3 & Standalone Synthesiser

Caelum Audio

    • 4.7 • 30 Ratings
    • Free



To celebrate international joke day 2023, we decided to take a big step with our first synthesizer plugin; SUBscription. While based on a tongue-in-cheek pun about the current state and direction of the music tech industry, we actually ended up with a surprisingly excellent plugin that takes user-generated phrases (subscription codes) and converts them into unique waveshapes in a monophonic sub-synth.

- Create powerful, characterful bass sounds

- Unique and exceptionally high IQ text synthesis technique ^TM

- Reasonable subscription models

- Unequivocally superior, requires no review.

Upon entering a subscription code into our brand new text-to-synthesis engine, you are entering a world of sonic enrichment and fame, but you may have to make a deal with the devil.

Text Synthesis
Create characterful wave shapes using our experimental new text-to-synthesis technique. We have prepared every possible character combination (subscription code) because you’re weak and predictable.

Drive & Dirt
Boost the ever loving **** out of the synth with some crispy drive. Use the Dirt knob’s Rate modulation to thicken and filth up your tracks with noisy textures.

Carve your frequencies out with the 12dB/oct low-pass ladder filter. Much like the filter, we too will be filtering out any bug reports, requests or errors - our time is far more important.

Add movement to your sounds with 2 envelopes, 2 LFO’s & 4 expression controls which are assignable to nearly every parameter. Unlike the fluid nature of modulation, we stand firm with our decisions - you just wouldn’t get it.

Product Aftercare
If you need support via email you’ll have to deal with harshly worded, incredibly frustrated developers and please note that all critical feedback of any nature will be met with serious scolding.

SUBscription is designed as an AUv3 plugin, meaning it works within iOS and iPadOS hosts such as Logic Pro, GarageBand, Cubasis 3, AUM and Beatmaker 3. SUBscription also works as a standalone instrument.

What’s New

Version 1.0.2

- bug fixes

Ratings and Reviews

4.7 out of 5
30 Ratings

30 Ratings

Thirdnail ,

I’m not sure how ANYONE would score this little synth lower than 5 stars!

Love this! These guys have earned my respect! International Joke Day, is a day that I will forever look forward too!

2022 Caelum Audio released ‘Dust Bin’, a fun AUV3 plugin that is aesthetically pleasing as well as usable!
2023 Caelum put Joke Day on the map for me, and will always be a day I look forward too! I hope 2024 they decide to release another ‘tongue-in-cheek app!

Thank you guys so much! I LOVE LOVE LOVE the randomize feature, it really spits out some very pleasing sounds that quickly become saved after a few tweaks as amazing presets!

Developer Response ,

Just wait for what's in store, International Joke Day 2024... We're poets and we didn't know it(s).

Thank you so much for the kind words, we've been getting a lot of love specific to the randomise feature so it's definitely something we'll be taking into consideration in the future for our other plugins.

See you next IJD and thanks again!

MrWoofles ,

What I need

As a peasant who does not know what is best for me, I am thankful for Caelum Audio standing up for what is in my best interest. With Subscription Synth, I can final own nothing and be happy. I would give it 10 stars if I could!

Developer Response ,

I am so pleased you see our obvious worth, we worked out that you simply couldn't be trusted to make your own decisions so we had to lay them out for you in a subscription format 😂

All jokes aside, thank you very much for the kind words and 5 star review :)

c6y ,


Simple and powerful, and easy to get fantastic sounds. Doesn’t do a 1000 things, and I prefer it that way. Maybe my favorite synth at the moment. Thanks guys.

Developer Response ,

Exactly what we were going for - thank you so much!

App Privacy

The developer, Caelum Audio, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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