'\" te
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.TH usb_ah 7M "15 May 2009" "SunOS 5.11" "STREAMS Modules"
.SH NAME
usb_ah \- USB audio HID STREAMS module
.SH DESCRIPTION
.sp
.LP
The \fBusb_ah\fR STREAMS module enables the USB input control device which is a
member of the Human Interface Device (HID) class and provides support for
volume change and mute button. The \fBusb_ah\fR module is pushed on top of a
HID class driver instance (see \fBhid\fR(7D)) and below an Audio Control class
driver instance (see \fBusb_ac\fR(7D)). It translates the HID specific events
to the events that are supported by the Solaris audio mixer framework.
.SH FILES
.sp
.ne 2
.mk
.na
\fB\fB/kernel/strmod/usb_ah\fR\fR
.ad
.sp .6
.RS 4n
32-bit ELF kernel STREAMS module. (x86 platform only.)
.RE

.sp
.ne 2
.mk
.na
\fB\fB/kernel/strmod/sparcv9/usb_ah\fR\fR
.ad
.sp .6
.RS 4n
SPARC 64-bit ELF kernel STREAMS module
.RE

.sp
.ne 2
.mk
.na
\fB\fB/kernel/strmod/amd64/usb_ah\fR\fR
.ad
.sp .6
.RS 4n
x8664-bit ELF kernel STREAMS module
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
ArchitecturePCI-based systems
_
Interface StabilityCommitted
.TE

.SH SEE ALSO
.sp
.LP
\fBhid\fR(7D), \fBusba\fR(7D), \fBusb_ac\fR(7D), \fBusb_as\fR(7D),
\fBusb_mid\fR(7D), \fBaudio\fR(7I),
.sp
.LP
\fISTREAMS Programming Guide\fR
.sp
.LP
\fISystem Administration Guide: Basic Administration\fR
.sp
.LP
\fIUniversal Serial Bus Specification 1.0 and 1.1\fR
.sp
.LP
\fIDevice Class Definition for Human Interface Devices (HID) 1.1\fR
.SH DIAGNOSTICS
.sp
.LP
None
.SH NOTES
.sp
.LP
If USB audio drivers are not loaded, buttons are not active.