
These drivers support digital audio, MIDI, synthesizers, and mixers found on sound cards. OSS provides sound card drivers for most popular sound cards under Linux and FreeBSD. It also includes a fully-featured kernel-level sequencer, a full compatibility layer for OSS/Free applications, an object-oriented C library which covers and enhances the ALSA kernel driver functionality for applications (client/server, plugins, PCM sharing/multiplexing, PCM metering, etc.), an interactive configuration program for the driver, and some simple utilities for basic management. The first is a fully modularized sound driver which supports module autoloading, devfs, isapnp autoconfiguration, and gives complete access to analog audio, digital audio, control, mixer, synthesizer, DSP, MIDI, and timer components of audio hardware. The Advanced Linux Sound Architecture is composed of several parts.

If you are developing, or know of, any other MIDI apps not listed here please drop me a note.

Interest in Linux based MIDI is growing and this list will probably not reflect the true amount of MIDI software available, but should provide a reasonable selection of applications. The update is free for current owners.The Linux MIDI-HOWTO : Software.
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MIDIPlayer X for Mac OS X 10.9 Mavericks or later is available for purchase for $1.99 USD.

MethodRed has released version 2.1 of MIDIPlayer X, a MIDI file player for Mac.
