Brian wrote: > alsa-base
in stretch there is no alsa-base $ dpkg -l | grep alsa ii alsa-utils 1.1.3-1 amd64 Utilities for configuring and using ALSA ii gstreamer1.0-alsa:amd64 1.10.4-1 amd64 GStreamer plugin for ALSA ii libsox-fmt-alsa:amd64 14.4.1-5+b2 amd64 SoX alsa format I/O library ii libzita-alsa-pcmi0:amd64 0.2.0-4 amd64 C++ wrapper around the ALSA API