Tieline Bridge-IT, User Manual

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20 Bridge-IT Manual v4.0
© Tieline Research Pty. Ltd. 2019
table below outlines the reference scales for G5 and G3 codecs, plus Report-IT in dBFS, as well
as the equivalent dBU scale.
Reference
Level Description dBu dBFS
1 Tieline G5 PPM meter low point -16dBu -38dBFS
Nominal 0vu reference level +4dBu -18dBFS
Level at which audio will clip/distort +22dBu 0dBFS
2 Tieline G3 PPM meter low point -11dBu -29dBFS
Nominal 0vu reference level +4dBu -14dBFS
Level at which audio will clip/distort +18dBu 0dBFS
3 Report-IT PPM meter low point -9dBu -23dBFS
Nominal 0vu reference level +4dBu -10dBFS
Level at which audio will clip/distort +14dBu 0dBFS
Configure Tieline G3 Codec Audio Reference Scales
Genie, Merlin, Bridge-IT and ViA codecs have more audio headroom than Tieline G3 audio
codecs, therefore the audio metering reference scale needs to be adjusted when these codecs
connect to a Commander or i-Mix G3 codec. The G3 metering scale is between -29dBFS and
0dBFS and audio levels should average around the nominal 0vu point at -14dBFS. Audio peaks
should not exceed 0dBFS when using analog audio to prevent clipping.
1. Press the SETTINGS button.
2. Navigate to Audio and press .
3. Navigate to Ref Level and press .
4. Select Tieline G3 and press .
Important Note: If your codec (Genie STL, Genie Distribution and Bridge-IT) supports
sending multi-unicast connections and the Auto (default) reference level is selected, the
first codec to which you connect configures the reference level used for all subsequent
multi-unicast connections.
Configure Report-IT Audio Reference Scales
The Report-IT setting is used for compatibility when connecting using Tieline's Report-IT
smartphone application. The Report-IT metering scale is between -23dBFS and 0dBFS and audio
levels should average around the nominal 0vu point at -10dBFS. Audio peaks should not exceed
0dBFS when using analog audio to prevent clipping.
1. Press the SETTINGS button.
2. Navigate to Audio and press .
3. Navigate to Ref Level and press .
4. Select Report-IT and press .
Channel 1 Mic/Line Level Audio Adjustment
The default input level setting in the codec for channel 1 is line level. To adjust this setting for a
mic-level or unbalanced source:
1. Press the SETTINGS button.
2. Navigate to Audio and press .
3. Ensure Input Type is set to Analog
.