## MMPM/2 Device Driver Reference

[prev][next][parent][TOC]

### AUDIO_HPI (46h) - Access high-performance interface

Category:
AUDIO_IOCTL_CAT (80h)
Function:
AUDIO_HPI (46h)
Description:
Access high-performance interface

Select an item:

    Description
    Parameter Packet Format
    Data Packet Format
    Returns

This IOCtl is not required for MMPM/2. It is part of the AudioDD specification and is provided for reference.

This IOCtl provides several high-performance interface functions and can be used to increase the size of the device driver's internal input and output buffers for higher bandwidth audio modes.