Hall Research AD-340 - Manual (Page 19)

Universal Audio Delay Processor
17
3.3.6 Factory Default Settings
 Analog Input – Sampling Rate: 48 kHz
 Delay Type: Millisecond – 0 msec
 Temperature: Nominal at 72° Fahrenheit and 23 °Celsius
 DOUT and AOUT mute off
 AUTO-MUTE
on
 Audio Gain –Unity: ADC = 0 dB and DAC = 0 dB
 Front Panel = unlocked
4 Troubleshooting
4.1 FAQ
The analog sound is distorted.
The AD-340 is designed with Nominal Line Level for CD, DVD and BD Player, set at 2
Vrms
(or 5.6
V
peak-to-peak
). Set the Audio Gain to Unity for audio sources at Line Level. However, for added
flexibility, the AD-340 also provides user controllable audio gain for weaker sources like a
microphone. For analog audio sources with lower line output, the ADC and DAC levels can be
adjusted manually. However, make sure that the ADC and/or DAC levels are not set too high, as
this might distort the output signal.
There is no sound when Analog Input is selected.
Check that the DOUT and AOUT are set to un-mute positions (not selected) and/or adjust the
ADC/DAC gain control until you can hear sound.
There is no sound when Digital Input (PCM data) is selected.
Check that the DOUT and AOUT in the GUI are set to un-mute positions (not selected).
There is no sound when Digital Input (Bitstream) is selected.
Check that the DOUT is set to un-mute position (not selected) in the GUI. Note that the analog
output is automatically muted for digital bitstreams. You will need an A/V Receiver with Dolby
Digital Decoder or DTS Decoder to decode the encoded bitstream into multi-channel audio.
I cannot adjust the volume when I use Digital Input to Digital Output.
The volume is only adjustable for analog inputs (ADC gain) and/or analog outputs (DAC gain).
There is no gain control for digital in to digital out. The gain can be adjusted for digital input to
analog output (DAC gain).
I cannot “un-check” the AOUT Mute when playing a Digital Bitstream.
The analog output is automatically muted for encoded bitstreams and it is not possible to un-mute
AOUT while an encoded bitstream is detected.
The SPDIF Non-PCM button is “Red” – is something wrong?
No – the SPDIF Non-PCM indicator simply shows that the current digital input is an encoded
Bitstream like Dolby Digital or DTS and not Linear PCM data.
The SPDIF Unlocked or SPDIF Error button is “Red” – is something wrong?
Yes – make sure that the Digital Cable is properly inserted. The PLL needs to lock onto the
incoming digital signal to be able to playback the audio.