EdnunpandClaude Opus 4.7
c59e413c1f
New user-facing features:
* Recording. Dedicated Record menu (Alt+O — moved from Alt+R to
avoid clashing with the Receive audio checkbox), Start/Stop on
Ctrl+R, settings dialog, per-profile source / format / bit-depth /
channel-mode / folder. Three source modes (received only, sent
only, both). Files are crash-resilient — a process crash
mid-recording leaves a playable file containing everything up to
the last header refresh (~5 seconds).
* Four output formats, all functional:
- WAV: 16/24-bit PCM or 32-bit float, custom writer with
periodic RIFF re-patching.
- MP3: LAME 128–320 kbps CBR (via NAudio.Lame).
- OGG-Opus: 96–256 kbps VBR (via Concentus.Oggfile, reusing the
Concentus encoder from the wire path).
- FLAC: 16/24-bit lossless (via CUETools.Codecs.FLAKE — pure
managed, no native DLL).
* Recording start/stop sound cues. record start.wav and
record stop.wav play around the recording transition. Played via
System.Media.SoundPlayer to the default Windows output, separate
from the recording pipeline so a normal recording does not contain
the cue.
* Per-cue Preferences. The old single "Mute connect/disconnect
sounds" checkbox is replaced by a CheckedListBox: Connect /
Disconnect / Recording start / Recording stop. Old profiles with
the legacy MuteConnectionCues=true are honoured on first load via
a migration path in the new Load* helpers.
* Receiver-side drift compensation switched from discrete
single-frame splices to a continuous WdlResampler at a smoothed
rate ratio. SessionPlayout.cs rewrite.
Diagnostics (only active with Enable logs ticked):
* Per-stage discontinuity probes — sender raw capture (per backend,
PushModeWasapi + Asio both wired), sender pre-encode (now per
lane in BothIndependent, fixing a cross-stream artefact), receiver
post-decode, post-ring, post-resampler.
* Wire-level packet sequence tracking on each PCM stream — in-order
/ missed / reordered / duplicated counts in the diag log.
* Clipped-sample delta in the diag log.
* New AudioStepProbe in RemSound.Core with per-channel scan helper.
UI changes:
* Record menu uses Alt+O (Rec&ord). Inside the menu, item mnemonics
unchanged (S / T / O / C).
* Auto-tune interval combo label is mode-aware: "Auto-tune latency
interval" in classic modes, "Auto-tune interval — WASAPI and ASIO"
in BothIndependent. The combo's Enabled state now follows EITHER
lane's auto-tune checkbox (was only the WASAPI one — bug).
Wire format and audio pipeline unchanged from v1.1 — v1.1 and v1.2
peers interoperate.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
RemSound
Low-latency peer-to-peer audio between two or more Windows PCs over UDP. Pick what each machine captures and what it plays back; audio flows directly between them, no central server.
Built for music collaboration over the internet, live monitoring across rooms in a house, podcast co-hosting, NVDA-Remote audio workflows, and anything else that wants "send the sound from this PC to that PC, fast".
Highlights
- WASAPI and ASIO side by side. Run them as two independent UDP streams at their own native latencies, or use WASAPI alone. ASIO drivers get hardware-clocked timing; WASAPI gets push-mode timing on single-source captures.
- Profiles. Save your full setup (device ticks, peers, codec, latency targets, hotkeys, ASIO driver) into one JSON file. Pick which profile to load at launch.
- Continuous auto-tune. Watches receive jitter and nudges the latency target to stay click-free without forcing you to overshoot. Independent per-lane in WASAPI+ASIO mode.
- Opus with inband FEC. Single-packet losses recover transparently — no click. PCM 24-bit 48 kHz is also available for clean LAN.
- Remote control hotkeys. Configurable global hotkeys can nudge a peer's RemSound volume or their Windows system master volume, opt-in on the receiver.
- Built-in self-updater. Optional GitHub-driven update check on a schedule you set.
- Designed for screen readers. Each control has a paired Alt+letter mnemonic. State changes raise the right UIA notifications. F1 anywhere opens the user manual.
Install
- Download the latest
RemSound-vX.Y.zipfrom Releases. - Extract somewhere it can write — e.g.
C:\RemSound\, yourDocuments, or a folder in your user profile. AvoidProgram Filesunless you grant write permission to the install folder (the self-updater needs to overwrite files in place). - Run
RemSound.exe. On first launch Windows Firewall will prompt — allow on private networks. - Open the user manual from the Help menu (or press F1) for the full walkthrough.
RemSound requires the .NET 10 Desktop Runtime. If it's not installed, Windows offers to fetch it on first launch. You can also install it from https://dotnet.microsoft.com/download/dotnet/10.0 (pick the "Windows x64 Desktop Runtime").
Updates
RemSound can check this repository's Releases page on a schedule (never, hourly, every 6 hours, every 24 hours) and either prompt you to install or do it silently. Configure via File → Preferences. You can also trigger a manual check from the Help menu or the same Preferences dialog.
Build from source
You need the .NET 10 SDK. The solution lives at RemSound.slnx.
cd D:\proj\RemSound
dotnet build -c Release
dotnet publish src\RemSound.App\RemSound.App.csproj -c Release
The publish output lands at src\RemSound.App\bin\Release\net10.0-windows\publish\. Copy its contents into a folder of your choice — or zip it for distribution. Don't enable PublishSingleFile or SelfContained=true; RemSound ships framework-dependent on purpose so the publish folder stays under 2 MB.
Project layout
src/RemSound.Core packet protocol, peer discovery, hotkeys, MMCSS, heartbeat, settings, AppConfig
src/RemSound.Sender capture → mix → encode → UDP send
src/RemSound.Receiver UDP receive → ring buffer → drift-corrected playout → render
src/RemSound.Harness console test program (1 sender → 1 receiver, no UI)
src/RemSound.App WinForms UI (sender + receiver + heartbeat + discovery + updater)
server/ optional Raspberry Pi / systemd-Linux relay bundle (see below)
Optional: running your own relay server
Two RemSound peers normally reach each other directly over your LAN, or via Tailscale across the internet. If neither of those work for your situation — for example one peer is behind a router that won't forward inbound UDP and you'd prefer not to use Tailscale — you can run a small Python relay on a publicly-reachable host (a Raspberry Pi at home with one UDP port forwarded works fine) and have both peers dial that.
The server/ folder in this repo is a self-contained bundle: relay script, systemd unit, install / uninstall / smoke-test scripts, and a step-by-step README. See server/README.md for the setup walkthrough.
Issues and feedback
Open an issue on the GitHub issues page. If reporting an audio problem, please tick File → Preferences → Enable logs, reproduce the issue, then attach the latest log file from logs\ next to RemSound.exe.
Licence
MIT. See LICENSE.