Disclosure: Rys Up Audio makes RysUpAir. This comparison uses current public documentation from both companies and calls out where Slate Fresh Air is the stronger fit.
If you are searching for a Slate Fresh Air alternative, the first thing to know is that price is no longer the deciding factor. Slate Fresh Air and RysUpAir are both available for $0. The useful comparison is about sound, controls, licensing, and how each plugin fits into a vocal chain.
Short answer: choose Fresh Air if you want Slate's vintage-exciter-inspired dynamic processing, presets, and familiar two-knob workflow. Choose RysUpAir if you want a vocal-focused dual-shelf approach, a live spectrum analyzer, and an activation path that does not require an iLok account. Both can add presence and top-end detail. They are not identical processors.
Slate Fresh Air vs RysUpAir: quick comparison
| Feature | Slate Fresh Air | RysUpAir |
|---|---|---|
| Current price | Free | Free, full plugin |
| Main approach | Dynamic high-frequency processing inspired by modified vintage exciter circuits | Vocal-focused mid and high shelves shaped to add lift while avoiding the harsh zone |
| Primary controls | Mid Air, High Air, Link, Trim, bypass, output meter | Mid Air, High Air, Link, input, output, bypass, live spectrum analyzer |
| Activation | Slate account plus linked iLok ID; official options include machine, iLok Cloud, or dongle activation | RysUpHub account and license activation; no iLok account or USB dongle |
| Platforms | macOS and Windows | macOS AU, VST3, AAX; Windows VST3, AAX |
| Best fit | Producers who want a familiar exciter-style tone with presets and output trim | Vocal producers who want simple shelf-based air, visual feedback, and no iLok account |
Price and licensing checked July 13, 2026. Slate describes Fresh Air as free for a limited time, so verify its offer before downloading. RysUpAir is positioned as free forever.
What Slate Fresh Air does well
Fresh Air earned its popularity by making high-frequency enhancement fast. Slate describes it as a dynamic high-frequency processor based on vintage exciter technology and modified Dolby-A-style processing. The main Mid Air and High Air controls cover presence and upper-air enhancement, while the Link control lets both move together.
Fresh Air also includes practical finishing controls. Its Trim knob helps level-match the processed and unprocessed signal, and its digital output meter makes clipping easier to catch. Slate publishes presets and application examples for vocals, drums, individual tracks, and full mixes. If you already use Slate's Complete Access Hub and have an iLok ID connected, the workflow will feel familiar.
That makes Fresh Air the stronger choice when you specifically want its exciter-inspired character, want preset starting points, or regularly use the same processor across vocals, drums, samples, and the mix bus.
Where RysUpAir takes a different approach
RysUpAir is not presented as a hidden AI system or a one-to-one copy of Fresh Air. It uses two straightforward tone-shaping bands: a Mid Air control centered on vocal presence and a High Air control for upper detail. The current design adds a live spectrum analyzer so you can see the area being lifted while you listen.
The shelf shapes are tuned for a common vocal problem: adding brightness without dragging too much 3 kHz edge, sibilance, or hiss into the foreground. The Mid Air band works around the lower-presence region, while High Air focuses higher. The Link control is useful when the vocal needs one broad lift rather than two separate moves.
The other practical difference is licensing. RysUpAir installs through RysUpHub and does not require an iLok account, iLok Cloud session, or USB dongle. Fresh Air does not require a physical dongle either because Slate supports machine and cloud activation, but its official redemption flow still asks you to link or create an iLok ID.
Which free air plugin should you choose?
Choose Slate Fresh Air if:
- You want its dynamic, vintage-exciter-inspired processing.
- You want factory presets and official tips for many source types.
- You value a built-in trim control and detailed output metering.
- You already have a Slate account, Complete Access Hub, and iLok ID.
Choose RysUpAir if:
- Your main goal is quick vocal presence and upper-air control.
- You want to see the tonal lift on a live spectrum analyzer.
- You prefer an activation workflow without creating or linking an iLok account.
- You need Mac AU/VST3/AAX or Windows VST3/AAX support.
Because both plugins are free, the most honest answer is to install both and level-match them in the same session. Keep the one that helps you make the decision faster. The brand name matters less than how the vocal sits once the whole mix is playing.
How to test Fresh Air and RysUpAir fairly
- Start with a controlled vocal. Do basic cleanup, compression, and de-essing first. An air processor will make uncontrolled sibilance more obvious.
- Match the loudness. Brightness can sound better simply because it raises the perceived level. Use Fresh Air's Trim control or your DAW output gain, and match RysUpAir with its output control.
- Begin with the high band low. Add just enough top end to hear breath and detail, then back it down slightly.
- Add mid presence only if needed. If the vocal already cuts through the guitars, keys, or snare, more Mid Air may make it aggressive.
- Check the full mix. Solo can hide harshness. Make the final decision with cymbals, guitars, and synths playing.
- Bypass at matched level. If the plugin only sounds better because it is louder, reduce the output and test again.
Starting points for vocals
Dark rap or R&B lead: use a moderate Mid Air lift and a smaller High Air lift. Keep the de-esser before the air plugin, then check breaths and consonants after processing.
Bright pop lead: start with the High Air control barely engaged. If the vocal needs more clarity, try a small cut in the low mids before adding more top end.
Stacked backgrounds: use less Mid Air than on the lead so the stacks do not crowd the center. A little High Air can keep the layers open without pushing every word forward.
Drum overheads or mix bus: Fresh Air's broader documented use cases and trim control make it a natural first test. RysUpAir can still work, but use small moves and watch cymbal peaks closely.
Common air-plugin mistakes
Adding air before fixing noise: both processors emphasize the top of the signal, so headphone bleed, room hiss, and rough edits can become more obvious. Clean those problems before deciding how much sheen the vocal needs.
Boosting presence and air equally: the two controls solve different problems. Mid presence helps words cut through dense instruments. Upper air adds breath and openness. A vocal can need one without needing the other, so unlink the controls when the combined move gets sharp.
Judging only on headphones: a bright vocal can feel exciting at low headphone volume but become tiring on speakers. Check a quiet monitor pass and a phone-speaker pass before committing the setting.
Ignoring automation: the chorus may need more lift than the verse, and stacked backgrounds often need less than the lead. Automating a small control change can sound cleaner than choosing one aggressive setting for the whole song.
Does either plugin replace EQ or de-essing?
No. An air processor is a finishing tool, not a repair step. Use EQ to remove resonances and mud. Use a de-esser to control sharp consonants. Use the air plugin after those moves when the vocal is clean but still feels closed-in.
If adding air immediately makes the vocal painful, the problem is usually earlier in the chain. Pull the air back, control the sibilance, and check whether compression is exaggerating breaths. That fix is more reliable than stacking another brightener on top.
Final verdict
Slate Fresh Air remains a good free plugin. Its dynamic exciter-style processing, presets, trim control, and broad source coverage are real strengths. RysUpAir is the better fit for producers who want a vocal-first shelf workflow, live spectral feedback, and no iLok account.
Neither plugin needs a paid subscription to use the free license. The cleanest decision is based on sound and workflow: Fresh Air for its particular exciter character, RysUpAir for its visual, vocal-focused, no-iLok path.
Try RysUpAir free
The full plugin is free, with no trial period or watermark. Install it through RysUpHub and compare it against the tools already in your vocal chain.
Sources and update note
- Slate Digital Fresh Air product page
- Slate Digital Fresh Air documentation
- Slate Digital Fresh Air redemption and iLok activation guide
- RysUpAir product and compatibility page
Last checked July 13, 2026. Product offers and compatibility can change; follow the linked official pages for the latest download requirements.
