Sounds Are Distorted Or Muffled; There Is Buzzing Or Hum; The Overall Volume Is Low - Smarttech Smart 6000 Series Master Troubleshooting Manual

M T
ASTER ROUBLESHOOTING
itself. Set any PC or Application volume to approximately 80% with the IFP being
the final control. This will also help with overall acoustical performance.
3.2.5. Check all connections. RCA cables in particular can look fully engaged and still
not be
3.2.6. Ensure the speakers are correctly powered
3.2.7. On the 8070-G4 panels, there is an external/internal speaker switch on the rear
of the panel; otherwise the settings are On Screen Display based.
3.2.8. With the G5 panels if a cable is plugged into the line out of the panel it will turn
off the internal speakers
3.2.9. Note that there is no USB audio support in the 75-G5, and 65V2-G5 series
3.3. Sounds 3.3.

Sounds are distorted or muffled

are distorted or muffled
3.3. 3.3. Sounds Sounds are distorted or muffled are distorted or muffled
3.3.1. The most likely cause of distorted audio can be incorrectly set levels. If your
computer audio is too low and your IFP is too high the audio will sound tinny and
noisy. Conversely if your PC is turned up too high and your IFP too low then it can
sound garbled and muffled. It should be set with your sources at approximately
80% of max volume and your IFP as the control stage. Applies to analog and
digital.

3.4. There is buzzing or hum

3.4. 3.4. 3.4. There is buzzing or hum There is buzzing or hum There is buzzing or hum
3.4.1. Having your IFP plugged into a completely different outlet then your source
device can cause a 'ground loop'. It is recommended to always plug your devices
into the same power bar or use some sort of audio isolation to decouple your
audio path from earth ground. Please note SMART does not condone the use of
'ground loop isolators' or 'ground lifters' for normal use as they can defeat built in
safety measures. The use of such device can cause injury, and if using an
isolation technique, decoupling via transformer is the safest way. Applies to
analog and digital.
3.4.2. Long or poor quality analog cables can pick up external noise. Efforts should
be made to use the shortest runs possible with only high quality shielded cables,
and try to keep runs away from AC power mains. Does not typically apply to
digital audio.
3.5. T T T T he overall volume is low 3.5. 3.5. 3.5. he overall volume is low he overall volume is low he overall volume is low
3.5.1. Make sure all sources are mapped through the PC and into the SMARTBoard
correctly. By right clicking the speaker icon and selecting 'Playback Devices' you
have access to the input audio path setup. Note that HDMI, analog, and USB
connections are typically available and may require additional setup. Also note
the OSD settings on your IFP will give additional mapping options on G4 and
earlier display. G5 will give the option to switch between HDMI or USB only.
3.5.2. Further to ensuring proper mapping, volume settings must also be confirmed.
There is a volume setting on the PC, the IFP, and in some cases the application
itself. Set any PC or Application volume to approximately 80% with the IFP being
the final control. This will also help with overall acoustical performance.
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