“UA Solo” almost always refers to the Universal Audio Apollo Solo, a small desktop audio interface used for recording and music production.

What UA Apollo Solo is

• A 2‑in / 4‑out desktop audio interface with 24‑bit/192 kHz conversion for Mac and Windows.

• It comes in Thunderbolt 3 and USB 3 versions; the USB model is Windows‑only and uses an external power supply.

Main features

• Two mic/line inputs with UA’s Unison preamp modeling, plus a Hi‑Z input for guitar/bass on the first channel.

• Built‑in DSP to run UAD plug‑ins for low‑latency monitoring and tracking with effects, plus a high‑quality headphone output.

Typical use cases

• Solo artists and producers recording vocals, guitars, and small overdubs on the road or in a small studio.

• Users who want access to UA’s plug‑in ecosystem and near‑zero‑latency monitoring without buying a larger Apollo unit.