Accompanist

Credits and licences

Accompanist stands on other people’s generous work. Thank you.

The music

Für Elise (Bagatelle No. 25 in A minor, WoO 59) by Ludwig van Beethoven (1770–1827), in a transcription shared on MuseScore and collected in the PDMX dataset, marked public domain by its uploader. The app’s library holds only pieces whose uploader marked them public domain or CC0, by composers who died in or before 1925.

The listening engine

Pitch detection uses the Basic Pitch model by Spotify (Apache License 2.0), run by tract by Sonos (MIT or Apache License 2.0). The engine is built from these Rust crates:

addr2line0.25.1Apache-2.0 OR MIT
adler22.0.10BSD OR MIT OR Apache-2.0
allo-isolate0.1.27see crate
anyhow1.0.104MIT OR Apache-2.0
anymap31.1.0BlueOak-1.0.0 OR MIT OR Apache-2.0
atomic0.5.3Apache-2.0/MIT
audio-core0.2.1MIT OR Apache-2.0
audioadapter3.0.0MIT OR Apache-2.0
audioadapter-buffers3.0.0MIT OR Apache-2.0
audioadapter-sample3.0.0MIT OR Apache-2.0
autocfg1.5.1Apache-2.0 OR MIT
backtrace0.3.76MIT OR Apache-2.0
bit-set0.11.1Apache-2.0 OR MIT
bit-vec0.10.1Apache-2.0 OR MIT
block-buffer0.10.4MIT OR Apache-2.0
borsh1.8.1MIT OR Apache-2.0
borsh-derive1.8.1Apache-2.0
build-target0.4.0MIT
bumpalo3.20.3MIT OR Apache-2.0
bytemuck1.25.2Zlib OR Apache-2.0 OR MIT
byteorder1.5.0Unlicense OR MIT
bytes1.12.1MIT
cc1.10.0MIT OR Apache-2.0
cfg-if1.0.5MIT OR Apache-2.0
cfg_aliases0.2.2MIT
chacha200.10.2MIT OR Apache-2.0
console_error_panic_hook0.1.7Apache-2.0/MIT
cpal0.15.3Apache-2.0
crypto-common0.1.7MIT OR Apache-2.0
dasp_sample0.11.0MIT OR Apache-2.0
delegate-attr0.3.1MIT
derive-new0.7.0MIT
digest0.10.7MIT OR Apache-2.0
downcast-rs2.0.2MIT OR Apache-2.0
dyn-clone1.0.20MIT OR Apache-2.0
dyn-hash1.0.0MIT OR Apache-2.0
either1.19.0MIT OR Apache-2.0
equivalent1.0.3Apache-2.0 OR MIT
erased-serde0.4.11MIT OR Apache-2.0
filetime0.2.29MIT/Apache-2.0
find-msvc-tools0.1.15MIT OR Apache-2.0
float-cmp0.10.0MIT
float-ord0.3.2MIT / Apache-2.0
flutter_rust_bridge2.13.0MIT
flutter_rust_bridge_macros2.13.0MIT
foldhash0.2.0Zlib
futures0.3.34MIT OR Apache-2.0
futures-channel0.3.34MIT OR Apache-2.0
futures-core0.3.34MIT OR Apache-2.0
futures-executor0.3.34MIT OR Apache-2.0
futures-io0.3.34MIT OR Apache-2.0
futures-macro0.3.34MIT OR Apache-2.0
futures-sink0.3.34MIT OR Apache-2.0
futures-task0.3.34MIT OR Apache-2.0
futures-util0.3.34MIT OR Apache-2.0
generic-array0.14.7MIT
getrandom0.2.17MIT OR Apache-2.0
getrandom0.3.4MIT OR Apache-2.0
getrandom0.4.3MIT OR Apache-2.0
gimli0.32.3MIT OR Apache-2.0
half2.7.1MIT OR Apache-2.0
hashbrown0.16.1MIT OR Apache-2.0
hashbrown0.17.1MIT OR Apache-2.0
hex0.4.3MIT OR Apache-2.0
indexmap2.14.2Apache-2.0 OR MIT
inventory0.3.25MIT OR Apache-2.0
itertools0.14.0MIT OR Apache-2.0
itertools0.15.0MIT OR Apache-2.0
itoa1.0.18MIT OR Apache-2.0
jobserver0.1.35MIT OR Apache-2.0
js-sys0.3.106MIT OR Apache-2.0
lazy_static1.5.1MIT OR Apache-2.0
libc0.2.191MIT OR Apache-2.0
libm0.2.16MIT
lock_api0.4.14MIT OR Apache-2.0
log0.4.34MIT OR Apache-2.0
maplit1.0.2MIT/Apache-2.0
matrixmultiply0.3.11MIT/Apache-2.0
md-50.10.6MIT OR Apache-2.0
memchr2.8.3Unlicense OR MIT
memmap20.9.12MIT OR Apache-2.0
memo-map0.3.4Apache-2.0
metrics0.24.6MIT
microfft0.6.0MIT
minijinja2.24.0Apache-2.0
miniz_oxide0.8.9MIT OR Zlib OR Apache-2.0
ndarray0.17.2MIT OR Apache-2.0
nom8.0.0MIT
nom-language0.1.0MIT
num-bigint0.4.8MIT OR Apache-2.0
num-complex0.4.6MIT OR Apache-2.0
num-integer0.1.47MIT OR Apache-2.0
num-rational0.4.2MIT OR Apache-2.0
num-traits0.2.19MIT OR Apache-2.0
object0.37.3Apache-2.0 OR MIT
once_cell1.21.4MIT OR Apache-2.0
parking_lot0.12.5MIT OR Apache-2.0
parking_lot_core0.9.12MIT OR Apache-2.0
paste1.0.15MIT OR Apache-2.0
pastey0.2.3MIT OR Apache-2.0
pin-project-lite0.2.17Apache-2.0 OR MIT
pitch-detection0.3.0MIT/Apache-2.0
portable-atomic1.15.0Apache-2.0 OR MIT
primal-check0.3.4MIT OR Apache-2.0
proc-macro-crate3.5.0MIT OR Apache-2.0
proc-macro21.0.107MIT OR Apache-2.0
prost0.14.4Apache-2.0
prost-derive0.14.4Apache-2.0
quote1.0.47MIT OR Apache-2.0
rand0.10.3MIT OR Apache-2.0
rand_core0.10.1MIT OR Apache-2.0
rand_distr0.6.0MIT OR Apache-2.0
rapidhash4.5.1MIT OR Apache-2.0
rawpointer0.2.1MIT/Apache-2.0
realfft3.5.0MIT
rubato3.0.0MIT
rustc-demangle0.1.28MIT/Apache-2.0
rustfft6.4.1MIT OR Apache-2.0
rustversion1.0.23MIT OR Apache-2.0
same-file1.0.6Unlicense/MIT
scopeguard1.2.0MIT OR Apache-2.0
serde1.0.229MIT OR Apache-2.0
serde_core1.0.229MIT OR Apache-2.0
serde_derive1.0.229MIT OR Apache-2.0
serde_json1.0.154MIT OR Apache-2.0
shlex2.0.1MIT OR Apache-2.0
simd-adler320.3.10MIT
slab0.4.12MIT
smallvec1.16.4MIT OR Apache-2.0
spectrum-analyzer1.9.0MIT
static_assertions1.1.0MIT OR Apache-2.0
strength_reduce0.2.4MIT OR Apache-2.0
string-interner0.20.0MIT/Apache-2.0
syn2.0.119MIT OR Apache-2.0
syn3.0.9MIT OR Apache-2.0
tar0.4.46MIT OR Apache-2.0
tokio1.54.1MIT
toml_datetime1.1.2+spec-1.1.0MIT OR Apache-2.0
toml_edit0.25.17+spec-1.1.0MIT OR Apache-2.0
toml_parser1.1.5+spec-1.1.0MIT OR Apache-2.0
tract-core0.23.9MIT OR Apache-2.0
tract-data0.23.9MIT OR Apache-2.0
tract-extra0.23.9MIT OR Apache-2.0
tract-hir0.23.9MIT OR Apache-2.0
tract-linalg0.23.9MIT OR Apache-2.0
tract-nnef0.23.9MIT OR Apache-2.0
tract-onnx0.23.9MIT OR Apache-2.0
tract-onnx-opl0.23.9MIT OR Apache-2.0
tract-transformers0.23.9MIT OR Apache-2.0
transpose0.2.3MIT OR Apache-2.0
typeid1.0.3MIT OR Apache-2.0
typenum1.20.1MIT OR Apache-2.0
unicode-ident1.0.27(MIT OR Apache-2.0) AND Unicode-3.0
version_check0.9.5MIT/Apache-2.0
visibility0.1.1Zlib OR MIT OR Apache-2.0
walkdir2.5.0Unlicense/MIT
wasm-bindgen0.2.129MIT OR Apache-2.0
wasm-bindgen-futures0.4.79MIT OR Apache-2.0
wasm-bindgen-macro0.2.129MIT OR Apache-2.0
wasm-bindgen-macro-support0.2.129MIT OR Apache-2.0
wasm-bindgen-shared0.2.129MIT OR Apache-2.0
web-sys0.3.106MIT OR Apache-2.0
windowfunctions0.1.1MIT
winnow1.0.4MIT
zerocopy0.8.63BSD-2-Clause OR Apache-2.0 OR MIT
zerocopy-derive0.8.63BSD-2-Clause OR Apache-2.0 OR MIT
zmij1.0.23MIT

The sheet music

Scores are drawn by OpenSheetMusicDisplay 2.2.0:

Copyright 2019 PhonicScore

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Fonts

Fraunces, IBM Plex Sans and Nanum Pen Script, from Google Fonts, under the SIL Open Font License 1.1.