ARCAM ST25 OM EN V1
11
S E T T I N G S M E N U
Menu
To access the setting menu, press on the remote control.
To navigate the menu use the navigation buttons on the remote control.
Menu Tree
Menu Option Description
Audio Output
Selects which output to use, Analogue or Digital.
Default is Analogue.
Volume Mode
Selects whether the audio output volume is Variable, Fixed or External.
Default is Variable.
Maximum External
Volume
Defi nes maximum volume value sent to an ARCAM Radia series amplifi er in External Volume mode.
Default is 40.
DAC Filter
Select a digital fi lter for the analogue outputs.
Default is Linear Phase Apodizing.
Eco Timer
When enabled, the ST25 will enter standby within 20 minutes with no user interaction or playback.
Default is On.
Network Standby
Selects whether the network connection is maintained in standby. Increases standby power consumption.
Default is On.
System Reset Press Select/OK to initiate a reset of all settings to default.
USB Update Press Select/OK to initiate a software update from a USB stick present in the USB socket on the rear panel
Product Information Displays SW versions, IP address and Network ID.
DAC Filters
The ST25 has the option to select between a number of digital fi lters that are used in the digital to analogue
conversion process. Digital fi lters are required to minimise unwanted distortion in the output but no fi lter is
perfect, there are always compromises between a few parameters:
1. Frequency response - audio level across audible frequencies. Ideally, this does not vary signifi cantly
between 20 Hz and 20 kHz.
2. Phase - The time delay introduced between reproducing diff erent audible frequencies. Ideally, this would
be as low as possible (linear phase).
3. Ringing - Additional audio artefacts that precede (pre) or follow (post) the audio. Ideally, these should be
as low level and last for as short a time as possible.
The following fi lters are available for selection in the ST25:
Minimum Phase - Fast roll-off preserves output level to 20 kHz with no pre-ringing but extended post ringing.
Linear Phase Apodizing - A compromise between frequency response and ringing. Very slight reduction in
output level of the highest frequencies. Pre and post ringing are equal and low in level.
Linear Phase Slow Roll-off - Measurable reduction in output level of the highest frequencies but pre and post
ringing are equal, very short, and low in level.
Minimum Phase Slow Roll-off - Similar reduction in output level of the highest frequencies to Linear Phase
Slow Roll-off . No pre-ringing and very little post ringing.
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