Names and functions
Front panel
❿
[OUTPUT] (L and R) connectors (RCA pin
jacks)
These connectors output an analog audio signal
after the D/A converter. They are used to connect
to an audio amplier, etc.
They are active when the [OUTPUT SEL] switch on
the front panel is set to the down (“RCA”) position.
<Note>:You can adjust the audio output level
from the [OUTPUT] connectors using the vol-
ume control knob.
⓫
[DIGITAL IN] connector (optical)
This connector inputs PCM digital audio.
It is used to connect to a digital audio source de-
vice such as a CD player.
<Note>:This connector does not accept DSD
audio.
⓬
[DIGITAL OUT] connector (optical)
This connector outputs PCM digital audio received
from the [USB] or [DIGITAL IN] connector in S/PDIF
format. When the unit receives DSD audio, no sig-
nal is output.
It is used to connect to a digital audio device.
⓭
[USB] connector
When you play back USB audio, connect a com-
puter to this connector using the supplied USB
cable .
When you play back audio received from the
[DIGITAL IN] connector, connect a device that can
supply USB bus power (such as a computer, USB
mobile power supply, etc.) to this connector.
<Notes>:
• To get stable power supply, directly connect
the USB cable without using a USB hub.
• To receive digital audio from your computer
via USB, you should make audio output setting
of the computer appropriately. Also note that
to play back DSD audio, an appropriate DSD
audio playback software application is required
on your computer.
⓮
[microSD] slot
When you upgrade the HP-A4 software in the fu-
ture, insert a microSDHC card that contains a soft-
ware upgrade le to this slot.
You can only use a microSDHC card (32GB or less).
<Note>:
• You can download the software upgrade le
together with the Update Notes and Manual
Supplement from the Fostex website (www.
fostex.com).
• The unit cannot playback audio data on a mi-
croSD card.
⓫ ⓬ ⓭❿ ⓮
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