YER End User Licence Agreement · version 1.0 · 4 September 2026
The short version: you bought a licence, not a subscription. It does not expire, the key is checked on your own computer, and everything you make with YER is yours. The key is personal — passing it on is the one thing that gets it blocked.
1. what this covers
This agreement is between you and Ayhan Dogan, trading as aysound (“aysound”, “we”, “us”), Zwergstr. 1, 89407 Dillingen a.d. Donau, Germany, info@aysound.com — the seller named in the legal notice. It governs YER, the paid sidechain ducker: the VST3 plug-in, the factory presets, the licence key, and every update we release within version 1.x.
It does not cover POMPA, our other paid product — that has its own agreement, the POMPA licence — and it does not cover the eleven free plugins of the aysound suite (aylimiter, aycompressor, ayeq, aydeesser, aygate, ayclipper, aysaturator, aywidth, aygain, aydelay, ayverb), which have the suite EULA. Do not read one for the other: the suite EULA grants a free-of-charge licence and says the software needs no licence file, and neither sentence is true of YER.
By installing or using YER — including in trial mode, before you have paid anything — you accept this agreement. If you do not, delete your copy.
2. trial mode
YER is a single download. Without a key it runs complete and without a time limit: all 32 bands, freeze, the advanced row, every factory preset, any number of instances, all six interface languages. Two things are held back, and only two:
- every 45 seconds the effect steps aside for 2 seconds — in real time and in your bounce alike;
- saving your own presets is switched off. Loading them, and every factory preset, stays free.
Trial mode may be used for as long as you like, for evaluation. Publishing a finished production that contains the dropout is your decision and your responsibility — YER says so in its own window and this site says so on the product page.
3. what you get when you pay
Against payment of the price shown at the time of purchase — 35 €, with no VAT under the small business rule of § 19 of the German VAT Act — aysound grants you a perpetual, non-exclusive, non-transferable, worldwide licence to install and use YER on the computers you work on yourself: studio machine, laptop and a spare, in any reasonable number. There is no expiry date, no renewal, and no online activation: the key is verified entirely on your own computer.
Everything you create with YER belongs entirely to you. Audio processed through it — recordings, mixes, masters, stems, bounces — is your work, and this agreement gives us no rights of any kind in it. Presets you make are yours; share or sell them freely. Commercial use is included without any further licence.
All updates within version 1.x are free. A version 2 would be a new product; owners of version 1 get a discount, not an automatic upgrade.
4. your key
The licence key is personal. It identifies your purchase, and it is the only thing standing between a paid copy and a free one. You may not publish it, sell it, lend it, or pass it to anyone else — not on a forum, not in a chat, not “just for a friend to try”.
A YER key opens YER and nothing else: it carries its own product marking and will not unlock POMPA, just as a POMPA key will not unlock YER.
A key that turns up in public, or whose payment was reversed, will be added to the block list of a later YER version. From then on that key no longer unlocks a copy that has been updated. Installations already running are not disabled remotely — we do not take software out of anyone’s hands after the fact.
Lost your key? It is in the e-mail you received when you bought it. If that is gone, write to info@aysound.com from the address you paid with and we will send it again.
5. what you may not do
You may not rent, lease, sublicense, or resell YER; distribute it as part of a bundle or a preset pack; reverse engineer, decompile or disassemble it, except where that is expressly permitted by mandatory law; remove or alter any notice or identifier inside it; or circumvent, or help others circumvent, the trial-mode dropout or the licence check.
Making a backup copy of the installer for your own archive is fine, and so is reinstalling YER on a replacement machine as often as you need to.
6. refunds and withdrawal
Your statutory right of withdrawal is set out on the right of withdrawal page, together with the model withdrawal form. It runs for the full fourteen days: for digital content the right ends early only if you have expressly consented to delivery beginning before the period is over and have confirmed that you thereby lose the right — and we ask for neither declaration. Beyond that: YER runs completely before you pay, so you can find out whether it suits you at no cost and no risk. If you nevertheless bought it and it does not work for you — a Mac, a host that will not load it, anything at all — write to info@aysound.com. We would rather refund you than have an unhappy customer.
7. warranty and liability
YER is provided as it is. We have tested it in the hosts and on the systems listed on the product page, but no one can test every combination of Windows build, DAW version, audio interface and driver. We do not warrant that it is free of defects or that it will be uninterrupted. Your statutory rights in the event of a defect remain unaffected; the terms of sale say more about them.
Nothing in this agreement limits our liability for intent, gross negligence, injury to life, body or health, or under any mandatory product liability law. For everything else our liability is limited to the price you paid for YER. In particular we are not liable for lost sessions, lost recordings or lost profit. Keep backups of your projects — that is true of every plug-in, ours included.
8. term
The licence runs indefinitely. It ends if you materially breach this agreement — above all by passing your key on or by circumventing the licence check. On termination you must stop using YER and delete your copies. Everything you produced with it beforehand stays yours; nothing in this section reaches into your finished work.
9. data protection
YER checks its key on your own computer; there is no activation server and no periodic check, which is why it will still work in ten years, with or without us. It has no analytics and no telemetry.
It makes exactly one kind of connection, and only while its window is open: at most once a day it fetches aysound.com/downloads/versions.json to see whether a newer version exists. That request carries nothing about you beyond what any browser sends — our server sees the request and your IP address in its ordinary web log, nothing more — and the settings menu switches the check off. What we store about your purchase, and how to have it deleted, is in the privacy policy.
10. governing law
This agreement is governed by the law of the Federal Republic of Germany, excluding its conflict-of-law rules and the UN Convention on Contracts for the International Sale of Goods. If you are a consumer resident in another country, this choice of law does not deprive you of the protection of the mandatory consumer rules of the country you live in. Place of jurisdiction, where one may lawfully be agreed, is the seat of the seller.
If a provision of this agreement is or becomes invalid, the rest stays in force.
11. trademarks
VST is a registered trademark of Steinberg Media Technologies GmbH. All other names are the property of their respective owners.