phosphor-app 0.3.19

Shared business logic for Phosphor DAW frontends
Documentation

Index

Overview

Phosphor is a digital audio workstation that runs entirely in your terminal. It pairs a themeable TUI with a real-time audio engine, giving you a DAW you can use over SSH, in a tiling window manager, or anywhere a terminal lives.

Each instrument track gets its own synthesizer instance with independent parameters. MIDI controllers are detected automatically on startup. The audio engine runs on a dedicated real-time thread with lock-free communication — no mutexes in the audio path, ever.

Quick Start

# Install from crates.io
cargo install phosphor-studio

# Or clone and build
git clone https://github.com/joshjetson/phosphor.git
cd phosphor
cargo build --release

# Run (TUI is the default)
cargo run --release

# Run with debug logging
PHOSPHOR_DEBUG=1 cargo run --release

# Run without audio (UI development)
cargo run --release -- --no-audio

# Run without MIDI
cargo run --release -- --no-midi

First steps once running:

  1. Press Space to open the command menu
  2. Press a to add an instrument track
  3. Select an instrument and press Enter
  4. Play your MIDI controller — sound comes out
  5. Use j/k to navigate synth parameters, h/l to adjust values
  6. Press Tab to cycle between Track FX, Synth params, Inst Config, Piano Roll
  7. Press Space then v to change the color theme

Instruments

Synthesizers

Instrument Type Voices Patches Description
Phosphor Synth Subtractive 16 4 waveforms Dual oscillators, SVF filter, drive, ADSR
DX7 FM 16 256 All 8 original factory cartridges, decoded from the ROM dumps
Jupiter-8 Analog poly 8 64 All 64 factory patch names, full 32-control panel, two envelopes
ARP Odyssey Duophonic 2 44 Complete 59-control front panel, all three filter revisions (4023/4035/4075), ADSR and AR envelopes, sample and hold
Juno-60 DCO poly 6 56 All 56 factory patches, read off Roland's patch charts; complete 25-control front panel measured against the hardware

Drum Rack

Kit Character
808 Rebuilt on the service-notes circuit values — 49.4 Hz bridged-T kick, 238/476 Hz snare, one shared free-running six-oscillator metal bank
909 The hybrid it really is — analog kick/snare/toms/rim/clap, and hi-hat, ride and crash as 6-bit 18 kHz samples
707 A PCM machine, not an analog one — sampled character through post-converter analog envelopes
606 Its own seven analog voices, built from the service-notes component values
777 808/909 bass + creative FM/ring-mod/wavefolder sounds
tsty-1 Warm vintage, tape-saturated, reel-to-reel character
tsty-2 Acoustic modal — Bessel membrane modes, multi-phase envelopes
tsty-3 88 unique sounds — every note a distinct synthesis
tsty-4 Extended hats/snares with long decays, varied synthesis methods
tsty-5 Resonator-based — impulse exciter into tuned bandpass filters, wire-coupled snares
LinnDrum 15 recordings through a mu-255 companded 8-bit converter; tuning is the read clock, so pitch and length move together
DMX 11 recordings making 15 sounds, companded 8-bit, per-card pitch trimmer at half an octave
SDS-V Five analog modules — triangle VCO, noise and click through a 4-pole SSM2044, ramp VCAs that stop rather than fade
727 The 707's converter with the Latin voice set: congas, bongos, timbales, agogo, cabasa, maracas, whistles, quijada, star chime
CR-78 Pre-808 Roland analog — a snare with no oscillator in it at all, one LC band-pass for every metal voice, and the metallic beat

Patch Highlights

DX7 (256 voices): every voice from the eight original factory cartridges — ROM1A/1B, ROM2A/2B, ROM3A/3B, ROM4A/4B — decoded from the ROM sysex dumps rather than recreated. That includes the ones that defined the instrument: E.PIANO 1, BASS 1, TUB BELLS, BRASS 1, STRINGS 1, HARPSICH 1, and the novelty voices Yamaha shipped alongside them (TAKE OFF, WASP STING, ..GOTCHA..). Pick a cartridge with the bank parameter, then a voice with patch.

Jupiter-8 (64 patches): the factory bank in Roland's own 8x8 numbering — 11 NEG SYNC, 13 JUICY FUNK, 15 CARS SYNC, 17 HAMMER LEAD, 24 MELLOW RHODES, 31 LO STRINGS, 45 PIPE ORGAN, 51 TRAIN CHUG, 57 TOMITA CHIME, 63 KLINGONS, 64 MUSIC OF THE SPHERES, 66 SOLAR WINDS, 71 FAT FIFTHS, 87 UPRIGHT BASS and the rest. Names, numbers, voice modes and character follow the original factory patch sheets; the parameter values are voiced to match Roland's published description of each patch.

Odyssey (44 patches): Bass, Funk, Sync Lead, Bells, Pad, S&H, Zap, Hawkshaw Funk, Bennett Atmos, Numan Cars, Sci-Fi Wobble, Percussive Pluck, Thick Lead, Filter Sweep, Noise Hit, Duo Split, Snare Drum, Kick, Resonance, Squelch, Growl, Wind, Wah Bass, Stab, Buzz, Flute, Tremolo, Siren, Brass, Organ, Conga, Tom, Clap, PWM Bass, Violin, Oboe, Choir, Trombone, Marimba, Alarm, Robot, Whistler, Sitar, Theremin

Juno-60 (56 factory patches, in the instrument's own seven banks of eight):

  • Bank 1 — 11 Strings 1, 12 Strings 2, 13 Strings 3, 14 Organ 1, 15 Organ 2, 16 Organ 3, 17 Brass, 18 Phase Brass
  • Bank 2 — 21 Piano 1, 22 Piano 2, 23 Celesta, 24 Mellow Piano, 25 Harpsichord 1, 26 Harpsichord 2, 27 Guitar, 28 Synthesizer Harp
  • Bank 3 — 31 Bass 1, 32 Bass 2, 33 Clavichord 1, 34 Clavichord 2, 35 Pizzicato Sound 1, 36 Pizzicato Sound 2, 37 Xylophone, 38 Glockenspeil
  • Bank 4 — 41 Violine, 42 Trumpet, 43 Horn, 44 Tuba, 45 Flute, 46 Clarinet, 47 Oboe, 48 English Horn
  • Bank 5 — 51 Funny Cat, 52 Wah Brass, 53 Phase Combination, 54 Reed 1, 55 Popcorn, 56 Reed 2, 57 Reed 3, 58 PWM Chorus
  • Bank 6 — 61 Synthesizer Organ, 62 Effect Sound 1, 63 Effect Sound 2, 64 Space Harp, 65 Funk, 66 Space Sound 1, 67 Mysterious Invention, 68 Space Sound 2
  • Bank 7 — 71 Percussive Sound 1, 72 Percussive Sound 2, 73 Whistle, 74 Effect Sound 3, 75 UFO, 76 Space Sound 3, 77 Surf, 78 Synthesizer Drum — the bank whose sound source is the VCF oscillating on its own

Names and spellings are Roland's, Glockenspeil included.

Features

Audio Engine

  • Real-time audio via cpal (CoreAudio, WASAPI, ALSA)
  • Lock-free audio thread — zero allocations, zero mutexes in the hot path
  • Per-track instrument instances with independent processing
  • Per-track and master VU metering via atomic shared state, on a dB scale
  • Configurable buffer size (default 64 samples, ~1.5ms latency at 44.1kHz)
  • Gain-staged for chords, not single notes — every instrument is sized so a two-handed voicing at full velocity still has headroom
  • Soft saturation on each instrument, transparent below its knee, replacing the hard clip that used to turn loud chords into a square wave
  • Stereo-linked master limiter at -1 dBFS with a non-finite guard, so nothing above full scale and no NaN can ever reach the audio device

Synthesizers

  • Phosphor Synth: 16-voice polyphonic subtractive — dual oscillators, SVF filter, drive, ADSR
  • DX7: all 256 original factory voices, decoded from the ROM cartridge dumps and played on a 6-operator engine modelled on the YM21280/YM21290 chipset — all 32 algorithms decoded from the hardware table (including the multi-operator feedback loops in algorithms 4 and 6), log-domain envelopes with the hardware rate curve and its distinct attack shape, coarse/fine/detune frequency on the real parameter grid, keyboard level and rate scaling, global LFO with six waveforms and two-stage delay, and a per-voice pitch envelope
  • Jupiter-8: the full front panel — dual VCOs with sync and exponential cross-modulation, switchable 12/24 dB IR3109 filter with resonance to self-oscillation, non-resonant HPF, two independent ADSR envelopes, LFO with four waveforms and a two-stage delay, portamento, and 4 voice modes (Solo/Unison/Poly1/Poly2). Envelope times follow Roland's published 1 ms-10 s specification; filter corners, LFO taper and keyboard follow are measured rather than approximated
  • ARP Odyssey: the full front panel — two VCOs with coarse and fine tuning over the panel's 20 Hz-2 kHz range, hard sync, per-oscillator pulse width and PWM, two frequency-mod inputs each, a keyboard switch that drops VCO-1 into the LFO range, the sample-and-hold mixer with its own sources, clock and lag, an XOR ring modulator sharing a fader with white or pink noise, all three filter revisions (12 dB 4023 SVF / 24 dB 4035 ladder / 24 dB 4075 Norton) on one 16 Hz-16 kHz sweep and each resonating to self-oscillation, a non-resonant HPF, three filter modulation slots, VCA gain and drive, and both envelope generators — the ADSR and the AR — with their own sliders and their own LFO-repeat gating. Envelope times follow ARP's published 5 ms-10 s specification and the pitch pads are mapped to pitch bend and the modulation wheel
  • Juno-60: the full front panel — LFO rate/delay, DCO with PWM depth and a 3-position PWM mode (LFO/MANUAL/ENV), saw/pulse/sub/noise and a 16'/8'/4' range switch, 4-position HPF, IR3109-style 24 dB/oct resonant VCF with env polarity, LFO and keyboard follow, ENV/GATE VCA, shared ADSR, and BBD stereo chorus (I / II / I+II). Envelope taper, LFO rate taper, filter corner frequencies and chorus rates are calibrated against measurements of the hardware rather than approximated. All 56 factory patches are the instrument's own, transcribed from Roland's published patch charts
  • Drum Rack: 15 kits including circuit-accurate 808/909/707/606, creative 777, warm tape-saturated tsty series, and resonator-based physical modeling

Session Management

  • Save/load projects as .phos files (human-readable JSON)
  • Ctrl+S quick save, Space+S save as, Space+O open
  • Saves all tracks, instruments, synth parameters, clips, MIDI notes, transport settings
  • A kit, a patch or a cartridge is stored by which one it is, not by where its knob sat: a knob position only names a patch while the bank is the size it was when the session was written, and reopening on a different instrument is the kind of wrong that looks perfectly reasonable
  • Atomic writes prevent file corruption
  • Default save directory: sessions/

User Presets

  • Space+W opens a preset browser for the selected instrument
  • Every instrument has its own bank, the drum rack included — the whole parameter block, including the factory patch it was dialled in from
  • One human-readable file per instrument (~/.phosphor/presets/<instrument>.json), atomic writes, so a DX7 preset can never be offered to a Juno
  • Presets sit beside the factory tables rather than extending them, so adding one cannot move a patch index stored in a saved session
  • A preset saved against a different panel — wrong instrument, wrong number of controls, or an older layout — is refused rather than loaded into the wrong holes
  • A kit, a patch or a cartridge is stored by which one it is, the same as a session stores it, so a preset saved on the 909 opens on the 909 after the rack has grown a kit rather than on whatever now sits at that fraction of the knob
  • 128 presets per instrument, 32 characters per name

Undo/Redo

  • u undoes the last action, Ctrl+R redoes
  • Works for: note draw/remove, highlight delete, paste, clip delete, track delete
  • Full track restoration on undo (instruments, params, clips, audio routing)
  • 100-action undo stack

Themes

  • 9 built-in color themes (see Themes)
  • Space+V cycles themes instantly
  • Theme choice persists across sessions (~/.phosphor/config.json)

MIDI

  • Auto-detection of MIDI controllers on startup
  • Lock-free SPSC ring buffer for MIDI-to-audio routing
  • Sample-accurate MIDI event processing
  • Note-on/off, CC, pitch bend support
  • Per-track MIDI routing — only the selected track receives input
  • Overdub recording with loop-based merge

TUI

  • Animated splash screen with shimmering aquamarine/violet dot-matrix art
  • 9 color themes with full UI coverage
  • Vim-style navigation (j/k/h/l, Enter, Esc)
  • Space menu (spacevim-inspired leader key)
  • Per-track color coding, VU meters, mute/solo/arm controls
  • Synth parameter panel with real-time adjustment and patch selection
  • Instrument config tab for deeper parameter access
  • Piano roll with horizontal scroll, playhead, column/row highlighting
  • Note-level edit mode with per-note select, move, transpose, and stretch
  • Variable-strength quantize (25–100%) with grid resolution selection
  • Clip locking with move, stretch, trim, and collision detection
  • Transport with BPM, loop region, metronome, recording
  • Send A/B buses and master track
  • Clean terminal restore on exit and panic

Architecture

  • Workspace with 7 crates, clean dependency graph
  • Modular file structure — app, UI, and state split into focused sub-modules
  • Shared domain models via atomics (no locks between threads)
  • Command channel pattern for UI-to-audio communication
  • Plugin trait for instruments and effects — same interface for built-in and third-party
  • 559 tests covering DSP, MIDI, engine, mixer, navigation, and persistence

Controls

Global

Key Action
Space Open command menu
Ctrl+C Quit
Ctrl+S Quick save session
u Undo last action
Ctrl+R Redo
Tab Cycle between panes / tabs
Esc Back / close menu / clear highlights

Space Menu

Key Action
Space 1 Focus transport
Space 2 Focus tracks
Space 3 Focus clip view
Space p Play / pause
Space r Toggle recording
Space l Edit loop region
Space m Toggle metronome
Space ! Panic — kill all sound
Space a Add instrument track
Space s Save project
Space o Open project
Space d Delete selected track/clip (with confirmation)
Space e Enter edit mode (note-level piano roll editing)
Space q Quantize notes to grid
Space w Instrument presets — save / load / delete
Space v Cycle color theme
Space h Open help topics

Preset Browser (Space+W, on an instrument track)

Key Action
j / k Navigate rows
Enter on the top row Name and save the current panel
Enter on a preset Load it into the track
d Delete the selected preset (y/n)
Esc Close the browser

Every instrument has its own bank, including the drum rack — the 35 controls behind a kit are exactly what a factory table cannot hold. A preset is the whole parameter block as it stands, including the factory patch it was dialled in from, so loading one puts the panel back exactly where it was.

Names are slots: saving under a name the bank already holds rewrites that preset, after a confirmation, rather than adding a second row you cannot tell from the first. 128 presets per instrument, 32 characters per name.

A preset saved for a different instrument, with a different number of controls, or against an older panel layout is refused rather than loaded — a block that does not fit the panel would produce a plausible sound that is not the one that was saved. The reason appears in the status bar.

The kit, the patch and the cartridge are stored by which one they are rather than by where the knob sat, for the same reason a session stores them that way: a knob position only names a patch while the bank is the size it was when the preset was written, and a preset that reopens on a different drum machine is the kind of wrong that looks perfectly reasonable. Presets written before this still load — the knob position is the only evidence they carry — and the status bar says to check the patch when one does.

Tracks Pane

Key Action
j / k Navigate between tracks
Enter Select track (shows synth controls)
h / l Navigate track elements (fx, vol, mute, solo, arm, clips)
m Toggle mute
s Toggle solo
r Toggle record arm
R Toggle loop record
1-9 Jump to clip by number

Volume Fader (navigate to vol with h/l, then Enter to lock)

Key Action
Enter Lock the fader
h / l Down / up by 1 dB
Esc / Enter Release the fader

The fader reads out in dB relative to unity — 0 at unity, +6 at the top, -oo at the bottom. New tracks start at -2. Unity is not the maximum: there is 6 dB of makeup gain above it, which is where to reach when a quiet patch needs to sit forward in a mix.

Clip Operations (navigate to a clip with h/l, then Enter to lock)

Key Action
Enter Lock to clip (enables move/stretch controls)
h / l Move clip left/right by one beat
H / Shift+Left Shrink clip (right edge moves left)
L / Shift+Right Extend clip (right edge moves right)
Ctrl+H / Ctrl+Left Trim left edge (start moves right)
Ctrl+L / Ctrl+Right Extend left edge (start moves left)
y Yank (copy) clip
p Paste clip after current clip
P Paste clip to same position on another track
d Duplicate clip (copy + paste next to it)
Esc Unlock clip (back to element navigation)

Clip operations include collision detection — clips cannot overlap. Moving, stretching, and trimming all respect adjacent clip boundaries. Note positions are automatically rescaled when stretching or trimming to preserve their absolute timeline positions. All changes sync to the audio thread in real time.

Piano Roll — Navigation Mode

Key Action
h / l Navigate between columns (beats)
j / k Scroll up/down through notes
1-9 Jump to column by number
Enter Select column (enter edit mode)
n Toggle note at cursor (draw or remove)
Esc Clear highlights or exit piano roll

Piano Roll — Column/Row Highlighting

Key Action
Shift+H / Shift+Left Start/expand column highlight left
Shift+L / Shift+Right Start/expand column highlight right
Shift+J / Shift+Down Start/expand row highlight down
Shift+K / Shift+Up Start/expand row highlight up
d Delete notes in highlighted region
y Yank (copy) notes in highlighted region
p Paste yanked notes at cursor/highlight position
j / k (without shift) Clear row highlight and move

Piano Roll — Column Selected (Right Left Trick)

Key Action
h / l Adjust left edge of all notes in column
H / L Adjust right edge of all notes in column
j / k Enter row mode (select individual note)
n Draw note at cursor position
Esc Back to navigation mode

Piano Roll — Row Mode (Single Note)

Key Action
h / l Adjust left edge of single note
H / L Adjust right edge of single note
j / k Move between notes in column
n Draw note / toggle note
Esc Back to column mode

Piano Roll — Edit Mode (Space+E)

Note-level editing. Where the Right Left Trick operates on whole columns, edit mode moves a cursor between individual notes.

Navigate

Key Action
j / k Move to next note up/down within the same column
h / l Jump to nearest note in previous/next column
Enter Select cursor note for moving
d Delete cursor note
u Undo
Esc / e Exit edit mode

Select (triggered by Shift+direction from navigate)

Key Action
Shift+J / Shift+K Extend selection up/down within the column
Shift+H / Shift+L Extend selection to previous/next column
d Delete all selected notes
h / j / k / l Begin moving the selection
Esc Clear selection, back to navigate

Move (after selecting, or Enter on a single note)

Key Action
h / l Move selected notes left/right by one grid step
j / k Transpose selected notes down/up by a semitone
Shift+H / Shift+L Stretch the right edge (duration)
Shift+J / Shift+K Stretch the left edge (start position)
d Delete all selected notes
Esc Lock notes in place, clear selection

Quantize (Space+Q)

Opens a modal that snaps the selected clip's notes to the grid. Requires a selected clip.

Key Action
j / k Move between rows (grid, strength, apply)
h / l Adjust the selected value
Enter Apply quantize (when on the apply button)
Esc Close without applying

Strength runs from 25% to 100%. At 100% notes land exactly on the grid; below that they move proportionally toward it, so you can tighten a performance without flattening its feel. Quantize is a single undoable action — u restores the original positions.

Loop Editor (Space+L)

Key Action
h / l Move loop start left/right
H / L Move loop end left/right
Enter Enable/disable loop
Esc Exit loop editor

Transport (Space+1)

Key Action
h / l Navigate transport elements
Enter Select element (BPM editing, etc.)
+ / - Adjust BPM

Themes

9 built-in color themes, cycle with Space+V:

Theme Description
Phosphor Original solarized-dark blue-teal (default)
SpaceVim Charcoal background with bright gold accents
Gruvbox Warm retro browns and oranges
Midnight Deep navy with cool blue and violet
Dracula Classic purple/pink/cyan dark theme
Nord Arctic polar night with frost blue/teal
Jellybean True black with soft pastel accents
Catppuccin Mocha variant with mauve/pink/sky pastels
SpaceVim2 Authentic SpaceVim colorscheme (from SpaceVim.vim)

Theme choice is saved to ~/.phosphor/config.json and persists across sessions.

Architecture

                    UI Thread                              Audio Thread
                    ---------                              ------------
                    NavState                               Mixer
                      |                                      |
                      +-- TrackState --Arc<TrackHandle>--> AudioTrack
                      |    muted ---> TrackConfig.muted      |
                      |    soloed --> TrackConfig.soloed      +-- instrument: Box<dyn Plugin>
                      |    volume --> TrackConfig.volume      +-- buf_l / buf_r
                      |    VU <----- TrackHandle.vu <------- +-- per-track VU
                      |
                      +-- MixerCommand --crossbeam--> Mixer.drain_commands()
                           AddTrack                     -> tracks.push()
                           SetInstrument                -> track.instrument = Some(plugin)
                           SetParameter                 -> plugin.set_parameter()

MIDI Controller --midir--> MidiRingSender --SPSC--> MidiRingReceiver
                                                        |
                                                   EngineAudio.process()
                                                        |
                                                   Mixer.process()
                                                        |
                                                   cpal audio callback --> speakers

Building from Source

Requirements

  • Rust 1.75+ (install via rustup)
  • System audio libraries:
    • macOS: CoreAudio (included with Xcode)
    • Linux: ALSA (sudo apt install libasound2-dev) and optionally JACK
    • Windows: WASAPI (included)
  • MIDI support requires a connected MIDI device (optional)

Build

cargo build --release

Test

cargo test --workspace  # 559 tests

Project Structure

phosphor/
├── Cargo.toml                 # Workspace root (phosphor-studio on crates.io)
├── src/main.rs                # CLI entry point
├── sessions/                  # Default save directory for .phos files
├── crates/
│   ├── phosphor-core/         # Audio engine, mixer, transport, metronome
│   ├── phosphor-dsp/          # Built-in instruments
│   │   └── src/
│   │       ├── synth.rs       # Phosphor Synth (subtractive)
│   │       ├── dx7.rs         # DX7 FM synthesizer (51 patches)
│   │       ├── jupiter.rs     # Jupiter-8 analog poly (42 patches)
│   │       ├── odyssey.rs     # ARP Odyssey duophonic (44 patches)
│   │       ├── juno.rs        # Juno-60 DCO + BBD chorus (56 factory patches)
│   │       ├── drum_rack/     # Drum machine (10 kits)
│   │       │   ├── mod.rs     # Shared types, voice, plugin impl
│   │       │   └── racks/     # Per-kit synthesis (808, 909, 707, 606, 777, tsty1-5)
│   │       └── oscillator.rs  # Waveform oscillators
│   ├── phosphor-midi/         # MIDI I/O, message parsing, ring buffer
│   ├── phosphor-plugin/       # Plugin trait definitions
│   ├── phosphor-tui/          # Terminal UI frontend
│   │   └── src/
│   │       ├── app/           # Application logic
│   │       │   ├── mod.rs     # App struct, main loop
│   │       │   ├── keys.rs    # Keyboard event handling
│   │       │   ├── piano_roll.rs  # Note editing, yank/paste
│   │       │   ├── clips.rs   # Clip manipulation (move, stretch, duplicate)
│   │       │   ├── tracks.rs  # Track creation, space actions
│   │       │   ├── transport.rs   # Playback, recording, loop sync
│   │       │   ├── delete.rs  # Delete with confirmation
│   │       │   ├── undo_redo.rs   # Undo/redo system
│   │       │   └── session_io.rs  # Save/load .phos files
│   │       ├── state/         # Navigation state
│   │       │   ├── mod.rs     # NavState struct, accessors
│   │       │   ├── navigation.rs  # Pane focus, movement, tabs
│   │       │   ├── params.rs  # Synth parameter adjustment
│   │       │   ├── track_ops.rs   # Track management, clip recording
│   │       │   ├── clip_view.rs   # Piano roll state, highlights
│   │       │   ├── menu.rs    # Menus, modals, instrument types
│   │       │   ├── undo.rs    # Undo action definitions
│   │       │   └── ...        # Loop editor, transport UI, etc.
│   │       ├── ui/            # Rendering
│   │       │   ├── mod.rs     # Layout orchestration
│   │       │   ├── top_bar.rs # Transport display
│   │       │   ├── tracks.rs  # Track rows, clip grid
│   │       │   ├── clip_view.rs   # Piano roll, FX panel, inst config
│   │       │   ├── overlays.rs    # Menus, modals, confirmations
│   │       │   └── bottom_bar.rs  # Key hints
│   │       ├── session.rs     # Session file format
│   │       ├── splash.rs      # Animated splash screen
│   │       └── theme.rs       # 9 color themes
│   └── phosphor-gui/          # GUI frontend (planned)
└── architect.md               # Architecture plan and roadmap

Configuration

CLI Options

phosphor [OPTIONS]

Options:
    --tui                 Launch TUI frontend (default)
    --gui                 Launch GUI frontend (not yet implemented)
    --buffer-size <N>     Audio buffer size in samples [default: 64]
    --sample-rate <N>     Sample rate in Hz [default: 44100]
    --no-audio            Disable audio output
    --no-midi             Disable MIDI input
    -h, --help            Print help
    -V, --version         Print version

Debug Logging

PHOSPHOR_DEBUG=1 cargo run --release

Creates phosphor_debug.log with timestamped user actions and system responses. Includes a panic handler that captures full backtraces to the log.

Theme Persistence

Theme selection is saved to ~/.phosphor/config.json and automatically loaded on startup.

Contributing

Phosphor uses a modular plugin architecture. The Plugin trait in phosphor-plugin is the contract for all instruments and effects:

pub trait Plugin: Send {
    fn info(&self) -> PluginInfo;
    fn init(&mut self, sample_rate: f64, max_buffer_size: usize);
    fn process(&mut self, inputs: &[&[f32]], outputs: &mut [&mut [f32]], midi_events: &[MidiEvent]);
    fn parameter_count(&self) -> usize;
    fn parameter_info(&self, index: usize) -> Option<ParameterInfo>;
    fn get_parameter(&self, index: usize) -> f32;
    fn set_parameter(&mut self, index: usize, value: f32);
    fn reset(&mut self);
}

To add a new instrument:

  1. Create a struct that implements Plugin
  2. Add it to phosphor-dsp (or your own crate)
  3. Add the variant to InstrumentType in phosphor-tui/src/state/menu.rs
  4. Wire it into create_instrument_track() in app/tracks.rs

License

MIT