HP XA Audio Controller, Audio Chip, Host Interface, Specifications

2 System Board

Devices on the ISA Bus

Audio Controller

The HP Kayak XA PC Workstation has an audio chip (AD1816) integrated on the system board. This single chip is a Plug and Play multimedia audio subsystem for concurrently processing multiple digital streams of 16-bit stereo audio.

Host Interface	The AD1816 audio chip contains all necessary ISA bus logic on chip. This
	logic includes address decoding for all onboards resources, control and signal
	interpretation, DMA selection and control logic, IRQ selection and control
	logic, and all interface configuration logic.
Audio Chip	It is driven from the ISA bus, and has the following specification:

Specifications

Feature:	Description:
Digitized Sounds	• 16-bit and 8-bit stereo sampling from 4 kHz to 55.2 kHz
	• Programmable sample rates with 1 Hz resolution
	• Hardware Full Duplex Conversion
	• 16-bit software-based real-time audio compression/
		decompression system
Music Synthesizer	• Integrated OPL3 compatible music synthesizer
Mixer	• AC’97 and MPC-3 audio mixer
	• Input mixing sources: microphone, LINE In,
		CD Audio, AUX Audio, and digitized sounds
	• Output mixing of all audio sources to the LINE Out or
		integrated PC Workstation speaker
	• Multiple source recording and Left/Right channels
		swapping or mixing
Line Input	• Input impedance: 15 kohms
	• Input range: 0 to 2 Vpp
Line Output	• Stereo output of 5 mW per channel with headphone
		speakers (impedance >600 ohms)
Audio Front Panel	•	Microphone input jack
	•	Stereo output jack
	• Master volume control potentiometer

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