Proof-of-concept addressing the audio exit criterion from
docs/architecture/proof-of-concept-plan.md §2:
"Capture/playback works on at least one desktop and one mobile
target."
PARTIAL PASS. The desktop half is verified on Linux; the mobile
half is NOT verified by this PoC and remains a documented open gap.
Implements via cpal (matching DEC-011 'platform-native first'):
- AudioCapture::record_to_wav opens the default input device,
handles f32/i16/u16 sample formats, down-mixes to mono, writes
16-bit PCM WAV via hound.
- AudioPlayback::play_wav opens the default output device, picks
a stream config matching the WAV, blocks until drained.
- synth_sine_wav produces a deterministic 440 Hz test signal for
headless verification of the playback path when no microphone
is available.
- Typed AudioError DTO with NoInputDevice, NoOutputDevice,
DefaultConfig, BuildStream, PlayStream, Wav, Io,
UnsupportedFormat arms.
Verified on 2026-05-13 (Linux + cpal + PipeWire). Capture stream
opened against the system default input; build failed against the
auto_null source (typed AudioError::BuildStream returned cleanly,
demonstrating the production error path); fallback to synth fired;
playback drove 24,000 frames to completion through
Rust → cpal → ALSA → pcm_pipewire → PipeWire → auto_null.
Both audio.rs tests pass.
Mobile gap (explicit, NOT closed):
- Android Oboe path not built or run.
- iOS AVAudioEngine path not built or run.
Surfaced finding for the decision register: DEC-011 does not pin an
audio crate. The PoC uses cpal; production code needs an owner
ruling, ideally after the mobile spike closes the gap.
Out of scope: DSP (HPF/NS/AEC/AGC), Opus encode/decode, jitter
buffer, mixer, latency measurement, bit-exact loopback, device
permission flows. These belong to chanora_audio.
Authority: PoC plan §2, DEC-011, SysDes audio subsystem.
Not product code; not promoted into chanora_audio.
Chanora
Chanora is a cross-platform voice communication client for TeamSpeak-compatible servers.
It is built with a shared Flutter UI and a Rust core, with TeamSpeak-compatible protocol integration isolated behind tsclientlib.
Flutter UI + Rust Core + tsclientlib
Chanora is an independent project and is not affiliated with, endorsed by, sponsored by, or officially associated with TeamSpeak.
Status
Chanora is currently in early planning and baseline-candidate design.
Current documentation baseline: v0.9.2
Current status: Baseline Candidate
Implementation status: Not production-ready
The current engineering focus is:
- defining the system and software architecture;
- preparing the Flutter + Rust application structure;
- validating TeamSpeak-compatible protocol integration through
tsclientlib; - defining cross-platform audio behavior;
- preparing release, verification, security, privacy, and legal gates.
Target Platforms
Chanora is intended to support:
- Windows
- macOS
- Linux
- Android
- iOS / iPadOS
Current platform policy:
| Platform | Baseline |
|---|---|
| iOS / iPadOS runtime target | iOS 13+ unless Flutter, plugin, audio, or product constraints require raising it |
| App Store Connect upload gate | Xcode 26+ with iOS 26 / iPadOS 26 SDK+ for upload on or after 2026-04-28 |
| Android runtime target | Android API 24+ unless Flutter, plugin, audio, or product constraints require raising it |
| Google Play target API | Target the Google Play-required API level on upload date |
The App Store / Play Store upload gates are release requirements. They are separate from local development and internal testing requirements.
Architecture Overview
Chanora separates UI, protocol logic, state synchronization, audio processing, diagnostics, and platform services.
Flutter Application
├─ App Shell
├─ Material 3 / Chanora Design System
├─ Feature Modules
├─ View Models / State
└─ Typed Flutter/Rust Bridge
Rust Core
├─ Connection Manager
├─ State Synchronization
├─ Protocol Adapter
├─ Audio Subsystem
├─ Storage Services
└─ Diagnostics
Protocol Layer
└─ tsclientlib
└─ TeamSpeak-compatible server
Key architecture rules:
- Flutter does not call
tsclientlibdirectly. - Protocol-specific types do not leak into the Flutter UI layer.
- Rust Core owns protocol coordination, state synchronization, audio logic, storage services, diagnostics, and bridge-facing DTOs.
- Flutter owns presentation, navigation, Material 3 theming, accessibility, localization presentation, and platform UI behavior.
- Product localization and server-provided content are separated.
- UTF-8 is the internal cross-layer text representation.
- Non-UTF-8 conversion, if needed, occurs only at explicit protocol or platform boundaries.
MVP Direction
The current recommended MVP scope is:
| Area | MVP decision |
|---|---|
| Active server connections | One active server connection per client instance |
| UI baseline | Material 3 + Chanora Design System |
| Product language | English UI first, i18n-ready architecture |
| Server content | Preserve Unicode and do not translate server-provided content |
| Audio processing defaults | Echo Canceller, Automatic Gain Control, Noise Suppression, and High-Pass Filter enabled where supported and stable |
| Audio implementation path | Platform-native first; fallback isolated behind the audio subsystem |
| Local non-secret storage | SQLite or equivalent embedded database |
| Secret storage | Platform secure storage |
| Flutter/Rust bridge | Stable typed bridge with generated or schema-controlled DTOs |
| Diagnostics | Local, user-initiated export only |
| Telemetry | None in MVP |
| Crash reporting | Disabled unless explicitly approved later |
Repository Layout
The repository documentation is expected to live under docs/.
docs/
requirements/
sysrs.md
srs.md
architecture/
sysdes.md
sad.md
sdd.md
verification/
verification-master-plan.md
swe4-unit-verification-plan.md
swe5-software-integration-verification-plan.md
swe6-software-verification-plan.md
sys4-system-integration-verification-plan.md
release/
release-readiness-go-nogo-record.md
platform-release-policy.md
security/
security-privacy-legal-guideline.md
threat-model.md
secure-storage-audit-report.md
diagnostic-redaction-audit-report.md
dependency-and-supply-chain-report.md
privacy/
privacy-policy.md
legal/
trademark-and-attribution-review.md
ui-ux/
material3-guideline.md
material3-design-tokens.md
material3-component-catalog.md
adaptive-layout-platform-guide.md
i18n/
localization-architecture.md
governance/
document-index.md
document-naming-convention.md
traceability-matrix.md
baseline-approval-record.md
baseline-candidate-validation-report.md
document-review-report.md
product-decision-register.md
decision-impact-assessment.md
git-commit-message-convention.md
repo-format-validation-report.md
path-migration-map.md
references/
external-references.md
aspice-swe2-swe3-integration-note.md
Implementation source folders may be added later. A likely structure is:
apps/
chanora_flutter/
core/
chanora_core/
crates/
chanora_protocol/
chanora_audio/
chanora_state/
chanora_storage/
chanora_diagnostics/
chanora_bridge/
The exact implementation layout should be finalized when the repository scaffold is created.
Documentation Entry Points
Start here:
| Topic | Document |
|---|---|
| System requirements | docs/requirements/sysrs.md |
| Software requirements | docs/requirements/srs.md |
| System architecture | docs/architecture/sysdes.md |
| Software architecture | docs/architecture/sad.md |
| Software detailed design | docs/architecture/sdd.md |
| Verification strategy | docs/verification/verification-master-plan.md |
| Release readiness | docs/release/release-readiness-go-nogo-record.md |
| Platform release policy | docs/release/platform-release-policy.md |
| Product decisions | docs/governance/product-decision-register.md |
| Traceability | docs/governance/traceability-matrix.md |
| Security/privacy/legal gates | docs/security/security-privacy-legal-guideline.md |
Engineering Process
Chanora follows this documentation hierarchy:
SysRS -> SysDes -> SRS -> SAD -> SDD
Direct traceability rules:
| Document | Direct upstream source |
|---|---|
| SysDes | SysRS |
| SRS | SysDes only |
| SAD | SRS only |
| SDD | SAD only |
Verification mapping:
SDD -> SWE.4 Unit Verification
SAD + SDD -> SWE.5 Software Integration Verification
SRS -> SWE.6 Software Verification
SysDes -> SYS.4 System Integration Verification
Release readiness is tracked separately through the Go/No-Go record.
Release Readiness
A release is not approved by design documents alone.
Before an external or public release, the project must complete:
docs/release/release-readiness-go-nogo-record.md
The release decision must explicitly state:
Go
Conditional Go
No-Go
Release readiness must include:
- release scope;
- build number;
- commit SHA;
- Git tag;
- artifact hashes;
- satisfied P0/MVP requirements;
- deferred requirements;
- verification results;
- waivers;
- security review status;
- platform readiness;
- legal and OSS review status;
- privacy policy status;
- approval decision and approvers.
Security, Privacy, and Legal Gates
Security, privacy, and legal evidence are required before public or store release.
Required documents include:
docs/security/threat-model.md
docs/security/secure-storage-audit-report.md
docs/security/diagnostic-redaction-audit-report.md
docs/security/dependency-and-supply-chain-report.md
docs/privacy/privacy-policy.md
docs/legal/trademark-and-attribution-review.md
Important gates:
- identity secrets and server passwords must use platform secure storage;
- logs and diagnostic exports must redact secrets;
- diagnostic export must be user-initiated unless a later approved policy changes this;
- dependency licenses and vulnerabilities must be reviewed;
- OSS notices must be prepared where required;
- public wording must not imply official TeamSpeak affiliation;
- privacy policy must describe local storage, diagnostics, permissions, and data handling.
Git Commit Convention
Chanora uses a Conventional Commits style format:
<type>(<scope>): <summary>
Examples:
feat(voice): add push-to-talk state handling
fix(protocol): recover channel tree after reconnect snapshot
docs(sad): add interface catalog and performance view
i18n(ui): add fallback behavior for missing localization keys
sec(diagnostics): redact server password from export bundle
release(android): prepare internal alpha build metadata
See:
docs/governance/git-commit-message-convention.md
Development
Implementation commands will be added after the repository scaffold is finalized.
Expected future commands may include:
flutter pub get
flutter test
cargo test
cargo clippy
cargo fmt
Do not treat these as authoritative until the actual Flutter/Rust workspace has been created.
Contributing
Before making a change:
- Check the affected requirement/design document.
- Confirm the correct traceability layer.
- Use the Git commit convention.
- Update docs and verification plans when the change affects requirements, architecture, detailed design, release behavior, security, privacy, or legal gates.
License
TBD.
The license model must be confirmed before public release. See:
docs/governance/product-decision-register.md
docs/security/dependency-and-supply-chain-report.md
docs/legal/trademark-and-attribution-review.md