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A1 Evo v3x Release Notes (11 July 2024)
Compatibility:
• Requires REW Beta version 43 or above for best results (a bug with persistent
Subwoofer EQ target type that could cause minor variations in sub alignment has
been fixed in that version).
Key Updates:
1. Extended crossover frequency range analysis:
o Large speakers will now be analyzed for up to a 90Hz crossover frequency
during optimization.
2. Subwoofer lowpass filter frequency:
o Bass extraction LPF setting is limited to 80-90Hz if there is just 1 subwoofer
or 3 subwoofers to avoid bass localization.
3. New customization parameters:
o Following customization parameters can be applied directly in the script if
required (lines 228:233):
▪ forceSmall (default value: 'false') - If 'true', front speakers will NOT be
set to 'Large / Full range'.
▪ forceLarge (default value: 'false') - If 'true', front speakers will NOT
be set to 'Small'.
▪ forceCentre (default value: 'false') - If 'true', front speakers will be set
to 'Large'. 'Subwoofer Mode' in the AVR will need to be set to 'LFE',
and subwoofer(s) will be time-aligned to the 'Centre' speaker.
▪ forceMLP (default value: 'true'; If 'true', only the first mic position
measurements will be used in most calculations. If 'false', all of the
measured mic positions average will be used.
▪ noInversion (default value: 'false') - If 'true', avoids subwoofer polarity
inversion. This may limit alignment options and could negatively
impact sound quality but is necessary if your subwoofers do not have
polarity switching capability.
▪ forceWeak (default value: 'false') - For systems with less powerful
receivers and/or identical speakers. If 'true', all bed channels will be
crossed over at 80Hz and all Atmos channels at 120Hz. If you
regularly listen at loud volumes, this option will avoid LFE + Main
mode and relieve your receiver and speakers by directing all bass
signals to the subwoofer(s).
o Please note that Evo will perform better with the default parameters on most
systems.
Hope you enjoy the enhanced audio experience!
Best,
OCA
Compatibility:
• Requires REW Beta version 43 or above for best results (a bug with persistent
Subwoofer EQ target type that could cause minor variations in sub alignment has
been fixed in that version).
Key Updates:
1. Extended crossover frequency range analysis:
o Large speakers will now be analyzed for up to a 90Hz crossover frequency
during optimization.
2. Subwoofer lowpass filter frequency:
o Bass extraction LPF setting is limited to 80-90Hz if there is just 1 subwoofer
or 3 subwoofers to avoid bass localization.
3. New customization parameters:
o Following customization parameters can be applied directly in the script if
required (lines 228:233):
▪ forceSmall (default value: 'false') - If 'true', front speakers will NOT be
set to 'Large / Full range'.
▪ forceLarge (default value: 'false') - If 'true', front speakers will NOT
be set to 'Small'.
▪ forceCentre (default value: 'false') - If 'true', front speakers will be set
to 'Large'. 'Subwoofer Mode' in the AVR will need to be set to 'LFE',
and subwoofer(s) will be time-aligned to the 'Centre' speaker.
▪ forceMLP (default value: 'true'; If 'true', only the first mic position
measurements will be used in most calculations. If 'false', all of the
measured mic positions average will be used.
▪ noInversion (default value: 'false') - If 'true', avoids subwoofer polarity
inversion. This may limit alignment options and could negatively
impact sound quality but is necessary if your subwoofers do not have
polarity switching capability.
▪ forceWeak (default value: 'false') - For systems with less powerful
receivers and/or identical speakers. If 'true', all bed channels will be
crossed over at 80Hz and all Atmos channels at 120Hz. If you
regularly listen at loud volumes, this option will avoid LFE + Main
mode and relieve your receiver and speakers by directing all bass
signals to the subwoofer(s).
o Please note that Evo will perform better with the default parameters on most
systems.
Hope you enjoy the enhanced audio experience!
Best,
OCA
