Hi Product Hunt — I’m the maker (solo developer from Japan). HQUpsampler Stream Bridge is a macOS app for Apple Silicon that helps you: • Upsample WAV/FLAC/AIFF files (offline conversion) • Capture Mac system audio (Spotify / Apple Music / YouTube, etc.), process it in real time, and stream to DLNA/UPnP players • Optional 6-band parametric EQ Notes / requirements: • macOS 12+ and Apple Silicon only (CPU intensive) • Stream Mode needs a virtual audio device (e.g., BlackHole 2ch) • Designed for music listening — video will have noticeable latency Free vs Pro: • Free: Quality up to 6, 15-min streaming limit • Pro: Quality up to 11, unlimited streaming, multi-core file conversion I’d love feedback, especially DLNA/UPnP compatibility: Which player model/firmware did you test, and was playback stable (dropouts/format issues)? Thanks!

HQUpsampler Stream Bridge

High-quality upsampling + DLNA/UPnP streaming for macOS

High-quality upsampling + DLNA/UPnP streaming for macOS