usb audio interface with bluetooth

Most models support common codecs such as SBC and AAC, plus higher‑quality options: aptX and its variants (aptX HD, aptX Low Latency/aptX LL, aptX Adaptive), LDAC, LHDC/HWA, and on some devices even aptX Lossless.

They use USB for recording and playback. Connections range from simple single‑port USB types to multi‑channel interfaces (for example 2x2 USB) and USB 3.0 B ports that are often USB 2.0 compatible.

Some adapters are 2‑in‑1 transmitter/receiver units. Mixers and DACs frequently provide Bluetooth as an input (receiver) to bring phone/tablet audio into the system, while compact adapters often offer explicit TX and RX modes for car or headphone use.

Many include built‑in digital effects (multi‑program digital FX), compressors and other processing, plus bundled recording software and FX plug‑ins for recording and sound shaping.

Many mixers include onboard processing such as compressors, +48V phantom power for condenser mics, and built‑in digital effects. Some also include an integrated USB audio interface and bundled recording software or FX plug‑ins.