I tried to use chroma plugin on debian stretch with the distributed beets version .
~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Debian
Description:	Debian GNU/Linux 9.3 (stretch)
Release:	9.3
Codename:	stretch
But I get the following error:
~$ beet version
** error loading plugin chroma:
Traceback (most recent call last):
  File "/usr/share/beets/beets/plugins.py", line 253, in load_plugins
    namespace = __import__(modname, None, None)
  File "/usr/share/beets/beetsplug/chroma.py", line 27, in <module>
    import acoustid
ImportError: No module named acoustid
beets version 1.3.18
plugins: convert, mbsync, smartplaylist
What do I have to install additionally ?
$ aptitude search acoustid
i   acoustid-fingerprinter                                                                                      - Fingerabdruckprogramm Acoustid
p   acoustid-fingerprinter:i386                                                                                 - Fingerabdruckprogramm Acoustid
p   python-acoustid                                                                                             - Acoustid interface implementation and Chromaprint bindings
p   python3-acoustid                                                                                            - Acoustid interface implementation and Chromaprint bindings (Python 3)
Thanks for any hint !
