Bricasti Design M7 Mainframe Stereo Reverb Processor Owner’s Manual - Manual (Page 16)

Audio I/O
Analog level adjustments
To obtain the best possible performance from the M7, analog input and output levels should be
set with care. Here are some guidelines on how to best set the analog audio levels in and out of
the M7. Also, follow this procedure to test the analog or digital I/O performance of the M7 as
you will need to bypass any processing to be able to test measure accurately. Be sure to note the
original level settings as you should return them to the default values after your test.
Setting and Testing the Analog Level
1. Press the System key, and use the cursor key to select Dry Gain. Turn the adjust knob
counter clockwise to set the level to 0dB, press Enter to set. Then cursor down to Wet Gain
and set to Off, press Enter to set. This will bypass any processing that will make it difficult to
measure the levels and also set the internal dry audio path to unity gain.
2. Feed a musical source or a 1k test tone at the maximum peak level that you use in your
system into the right and left channels
3. While watching the input display, adjust the input level control on the front panel so that the
peak is just short of the topmost LED on the meter display. This will be -6 dB below
clipping, and illumination of the top bright red LED is 0 dB.
0 db
-6 db
-12 db
-18 db
-24 db
-36 db
-72 db
-48 db
Front panel meter level indicator values
4. Set the output level found in the System menu, and select +8 dB, +16 dB, or +24dB to best
match the input sensitivity of your mixing console return or the next product in the chain.
5. Note: Upon completion of the setup test, return the settings to the factory default positions as
leaving them in high level values can cause the M7 to distort on high level signals. Always
allow headroom for the Reverb Process, as it can add up to 10 dB of gain to the signal!
Analog Reference Level Matching:
Set the system to dry with unity gain as described above. With the cursor keys, step through to
the Analog Out Level. Use the knob to set the output level to the +16 dB position. On the front
panel, set the Input Level selector to the top center stop position, 12 o’clock (+ 16 dbu ). This
will reference the analog I/O to unity.
Digital I/O
When interfacing the M7 using the AES digital I/O there is no level matching required, as level
information is part of the AES digital data stream. If you are testing the digital signal path for
integrity and gain, follow the steps described above for setting the M7 to dry.
Analog and Digital I/O Settings
In a typical installation you may want to connect both the analog and digital connectors and
choose which interface you want to use as the application demands, thus there are two ways to set
the M7’s audio inputs and outputs.
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