SIMAP

97,494 sample-based musical instruments, taken from 7,087 files across 2,811 artifacts uploaded by 1,253 people to musical-artifacts.com.

An instrument here is a playable preset rather than a recording: give it a MIDI note and it produces audio, at whatever pitch, velocity and duration you ask for. There is no fixed set of examples. The simap package provides the rendering, search and pytorch data loading code.

Listen to examples rendered with SIMAP instruments on the SIMAP demo page.

Licensing and usage restrictions

For AI training, this dataset is strictly non-commercial and research-only. Musical Artifacts have agreed to its release on this condition. See the platform's general AI policy.

Every artifact also carries the licence its uploader declared, whatever you use the dataset for. It is recorded per instrument in the license column of the metadata:

licence	instruments	artifacts
Creative Commons Attribution 3.0	39,775	1,353
Do What The Fuck You Want To Public License v2	30,138	527
Public Domain	12,973	539
Creative Commons Attribution 4.0	7,687	224
Creative Commons Attribution-ShareAlike 4.0	2,368	50
GNU General Public License V3	1,991	20
Free Art License v1.3	928	65
Creative Commons Attribution-NonCommercial-ShareAlike 4.0	731	5
GNU General Public License V1	697	14
Creative Commons Attribution-ShareAlike 3.0	108	2
GNU General Public License V2	80	4
Creative Commons Attribution-NonCommercial 4.0	15	6
Creative Commons Attribution-NonCommercial 3.0	3	2
total	97,494	2,811

What is in it

path	what it is
metadata.parquet, metadata.json	one row per instrument, 97,494 rows
keymap.parquet	one row per sounding layer, 20,206,106 rows
<artifact_id>/...	the instrument files, 115 GB
split.json	train / valid / test, 8:1:1
world_inst_subset.json, verified_label_subset.json, general_midi_subset.json	three selections
sonnet5_text_filtering.json	author label to a cleaned-up form
gm_sound_set.json, gm_perc_map.json	the general midi reference tables