Chapter 8. MIDI (MPU401-UART) Interface
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# Chapter 8. MIDI (MPU401-UART) Interface

## General

Many soundcards have built-in MIDI (MPU401-UART) interfaces. When the soundcard supports the standard MPU401-UART interface, most likely you can use the ALSA MPU401-UART API. The MPU401-UART API is defined in `<sound/mpu401.h>`.

Some soundchips have a similar but slightly different implementation of mpu401 stuff. For example, emu10k1 has its own mpu401 routines.

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