Hi, the Synth One open-source project [ https://github.com/AudioKit/AudioKitSynthOne ], unfortunately not available for Linux, runs fine installed to an iOS 12.2 VirtualBox guest [ https://i.imgur.com/4rHkCs4.jpg ]. Audio out works and is available for usage by the Linux host. [weremouse@moonstudio ~]$ lsb_release -a LSB Version: core-9.20160110ubuntu0.2-amd64:core-9.20160110ubuntu0.2- noarch:security-9.20160110ubuntu0.2-amd64:security-9.20160110ubuntu0.2- noarch Distributor ID: Ubuntu Description: Ubuntu 16.04.6 LTS Release: 16.04 Codename: xenial MIDI in for the Linux host works without issues, whatever MIDI hardware input I chose. [weremouse@moonstudio ~]$ amidi -l Dir Device Name IO hw:0,0 HDSPMx579bcc MIDI 1 IO hw:1,0 TerraTec EWX24/96 MIDI IO hw:4,0,0 Scarlett 18i20 USB MIDI 1 However, MIDI in isn't available for the VirtualBox guest. Any ideas? As a workaround I record MIDI tracks with Ardour running on the Linux host, export the MIDI files and import them by Auria Pro or Cubasis running on the iOS guest. IOW MIDI within the VirtualBox iOS guest works without issues. Regards, Ralf _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user