2026-10-28 17:16:01 +01:00
|
|
|
|
# Internal instruments and effects
|
|
|
|
|
|
|
|
|
|
|
|
No plugin downloads, search paths or external libraries are needed. The original
|
|
|
|
|
|
built-in sine remains available for existing projects.
|
|
|
|
|
|
|
|
|
|
|
|
Choose **Internal: Soft Keys** or **Internal: Sub Bass** in a MIDI track's
|
|
|
|
|
|
instrument dropdown. Soft Keys blends a sine with a third harmonic; Sub Bass
|
|
|
|
|
|
uses a pure sine. Both are fixed presets with 32 voices, velocity sensitivity,
|
|
|
|
|
|
short attack/release envelopes, sustain pedal, note-off and panic handling.
|
|
|
|
|
|
High harmonics are omitted near Nyquist. These basic instruments have no preset
|
|
|
|
|
|
editor, pitch bend, sample library or oscillator/filter controls.
|
|
|
|
|
|
|
|
|
|
|
|
In **Modular Graph**, select a wire and choose **Edit → Insert internal delay on
|
|
|
|
|
|
wire** or **Insert internal reverb on wire**. This preserves the route and inserts
|
|
|
|
|
|
the effect into the signal path. **File → Add internal delay/reverb** creates an
|
|
|
|
|
|
unconnected device for manual wiring. Select its node and use **Edit → Selected
|
|
|
|
|
|
plugin control** to edit it, or **Selected plugin automation** to automate it.
|
|
|
|
|
|
Changes use the existing stopped-engine preparation and undo workflow.
|
|
|
|
|
|
|
|
|
|
|
|
- **Delay:** time (1–2000 ms), feedback (0–0.95), dry/wet mix (0–1).
|
|
|
|
|
|
- **Reverb:** four parallel damped feedback combs, with decay (0–0.95), damping
|
|
|
|
|
|
(0–0.95) and dry/wet mix (0–1). Decay is a feedback coefficient, not seconds.
|
|
|
|
|
|
|
|
|
|
|
|
These are basic mono processors; stereo plans use independent instances. Reverb
|
|
|
|
|
|
is deliberately simple and has no room model or stereo diffusion. Delay time
|
|
|
|
|
|
changes can click; there is no crossfade or tempo sync. Transport seeks retain
|
|
|
|
|
|
existing effect history, like LADSPA. Effect tails require continued rendering;
|
|
|
|
|
|
playback/export does not automatically extend the song for tails.
|
|
|
|
|
|
|
|
|
|
|
|
Project format 13 stores internal devices as format 4 with reserved module path
|
|
|
|
|
|
`/xtc/internal`, stable numeric identity and index (0 keys, 1 bass, 2 delay,
|
|
|
|
|
|
3 reverb). This is a virtual identifier, never an external binary. Effect controls
|
|
|
|
|
|
and automation are saved using the existing plugin records; instruments are fixed
|
|
|
|
|
|
presets. Readers still accept formats 1–12. Older xtc builds reject format 13.
|
|
|
|
|
|
All buffers are allocated during preparation; processing performs no allocation,
|
|
|
|
|
|
file access, library loading, locking or GUI calls.
|
|
|
|
|
|
|
|
|
|
|
|
Validation: `make BUILD_DIR=build/phase38 all gui test test-gui-instruments
|
|
|
|
|
|
test-gui-modern-plugins test-gui-plugins analyze` (join onto one line).
|
|
|
|
|
|
`test-builtins` checks impulse tails, dry mix, feedback bounds, block partition
|
|
|
|
|
|
consistency, note release/panic and instrument/effect project round trips.
|
2026-11-05 23:44:48 +01:00
|
|
|
|
|
|
|
|
|
|
## Phase 40 acceptance checks
|
|
|
|
|
|
|
|
|
|
|
|
`make BUILD_DIR=build/phase40 all gui test test-reliability test-gui builtin-preview`
|
|
|
|
|
|
checks all four device identities and GUI paths without external plugin binaries.
|
|
|
|
|
|
The reliability runner fails each internal preparation allocation in turn and
|
|
|
|
|
|
forbids allocation/free, direct file I/O and blocking locks during processing.
|
|
|
|
|
|
Core tests compare persisted rendering for both instruments and both automated
|
|
|
|
|
|
effects, corrupt an internal module identity transactionally, and cover voice
|
|
|
|
|
|
exhaustion, sustain, repeated notes, partitioning and transport reset/seek/panic.
|
|
|
|
|
|
The existing portability suite verifies older project migrations.
|
|
|
|
|
|
|
|
|
|
|
|
For repeatable manual listening, run `make builtin-preview` and audition
|
|
|
|
|
|
`build/builtin-{0,1,2,3}.wav` at a conservative level: 0 is Soft Keys, 1 Sub Bass,
|
|
|
|
|
|
2 Delay and 3 Reverb. Each six-second file includes held tones or two impulses
|
|
|
|
|
|
followed by silence for tails. Check onset/release, unwanted discontinuities,
|
|
|
|
|
|
finite decay and the documented mono character. Generation is verified;
|
|
|
|
|
|
human listening and physical-device qualification remain pending.
|
