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ChrisBeWithYouandClaude Fable 5
e0fa65add5
Two issues found while testing the USB-guitar-cable path on Windows: 1. Centre a mono input. SourceChain::processBlock fell into the pass-through branch for a 1-channel input, filling only min(inputChannels, outputChannels) = 1 output channel and zeroing the rest, so a mono USB guitar cable played out of the left speaker only. A single-channel input is now broadcast across every output channel. 2. Only attempt the combined (duplex) device when input and output are the SAME physical endpoint. Two different endpoints of the same backend (USB cable in + separate speakers out) are independent hardware clocks; routing them through one duplex device was unstable across the app lifecycle (no audio until an explicit Apply, then distortion / dropouts / silent-in-song on navigation). Different endpoints now use the split path, whose ring bridges the two clocks. Same-endpoint duplex (one interface for in and out) keeps the low-latency win. Low latency for the two-device case is a follow-up that needs the device-lifecycle work (startup restore + reconfigure on navigation). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01JEoFeTPSnz4NpwwCG52hnu