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Author Topic: DSP Bass Gain  (Read 7517 times)
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manisandher
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« on: October 20, 2014, 07:34:09 pm »

The original DSP file that Peter provided me for my Orelo (haha... NOT Orelino) speakers had the bass gain set to -27.0dB. From initial listening, this was clearly too high attenuation. With a bit of trial and error (i.e. no actual SPL measurements), I set it to -25.0dB for the best balance.

Right now, with my '75B' NOS1a, the bass might be ever-so-slightly too heavy - voices are just a tad too husky (though otherwise gorgeous). So I might want to play around with the gain a little. But before I do this, I have a couple of questions for you Peter.

1. Is the initial setting of -27.0dB the 'correct' setting for optimal cross-over performance?
2. How does increasing the gain by 2.0dB (as in my -25.0dB setting) affect the cross-over point?

Mani.
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Main System:
Phasure Mach III (Win 14393.0 on RAM-OS / controlled by RDC, / connected directly to music server / XXHighEnd 2.10 / Minimize OS / Engine#4 Adaptive / DB=4096 / Q1=10 / xQ1=15 / Q3,4,5=1 / SFS=0.69 / XTweaks = 34, 10, 0, 0, 0 / Straight Contiguous / Clock Resolution = 15ms / Scheme 3-5 (low/realtime) / 8x Arc Prediction / switch #5 'up/off' / Unattended) mobo USB3 port -> Lush^2 -> Phasure NOS1a B75 G3 -> 8m Blaxius^2 -> First Watt F5-cloned mono amps -> Tune Audio Anima horn speakers
Office System:
Phasure Mach II (with Nick's clock upgrade) -> Lush^2 -> Phasure NOS1a G3 -> BD-Design BD30-SPR mono amps -> Tune Audio Marvel horn speakers
PeterSt
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« Reply #1 on: October 20, 2014, 07:41:37 pm »

Hi Mani,

Both questions are actually the same if you only see that the answer to #1 is "not". This is how it is designed.

Otherwise I am almost sure that the -27 you "received' is 1.5dB too low for the reasons I already could not explain to you by email. Almost sure, which means not 100%. But derived from this, my "original" setting would be -25.5 compared to your -25.0. So reasoning from there you should be 0.5dB too high compared to what I have here.

Peter
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For the Stealth III LPS PC :
W10-14393.0 - April 1, 2020 (2.11)
XXHighEnd Mach III Stealth LPS PC -> Xeon Scalable 14/28 core with Hyperthreading On (set to *14/28* cores in BIOS and set to 10/20 cores via Boot Menu) @~660MHz, 48GB, Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = *14*/-/1/1/1/ Q1Factor = *1* / Dev.Buffer = 4096 / ClockRes = 15ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = *10.19*  (max *10.19*) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / Stop Desktop, Remaining, WASAPI and W10 services / Use Remote Desktop / Keep LAN - Not Persist / WallPaper On / OSD Off (!) / Running Time Off / Minimize OS / XTweaks : Balanced Load = *52* / Nervous Rate = 10 / Cool when Idle = n.a / Provide Stable Power = 0 / Utilize Cores always = 1 / Time Performance Index = Optimal / Time Stability = Stable / *Arc Prediction Filtering (16x)* / Always Clear Proxy before Playback = On -> USB3 from MoBo -> Lush^2*A:B-W-Y-R, B:B-W-R* USB 1m00 -> Phisolator 24/768 Phasure NOS1a/G3 75B (BNC Out) async USB DAC, Driver v1.0.4b (16ms) -> B'ASS Current Amplifier -> *Blaxius^2 A:B-R, B:B-R* Interlink -> Orelo MKII Active Open Baffle Horn Speakers. *ET^2* Ethernet from Mach III to Music Server PC (RDC Control).
Removed Switching Supplies from everywhere (also from the PC).

For a general PC :
W10-10586.0 - May 2016 (2.05+)
*XXHighEnd PC -> I7 3930k with Hyperthreading On (12 cores)* @~500MHz, 16GB, Windows 10 Pro 64 bit build 10586.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/1/1/1 / Q1Factor = 1 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 0.10  (max 60) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = *43* / Nervous Rate = 1 / Cool when Idle = 1 / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> Clairixa USB 15cm -> Intona Isolator -> Clairixa USB 1m80 -> 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
Removed Switching Supplies from everywhere.

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manisandher
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« Reply #2 on: October 20, 2014, 07:43:51 pm »

Thanks Peter. I'll change it incrementally to see how I go.

Mani.
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Main System:
Phasure Mach III (Win 14393.0 on RAM-OS / controlled by RDC, / connected directly to music server / XXHighEnd 2.10 / Minimize OS / Engine#4 Adaptive / DB=4096 / Q1=10 / xQ1=15 / Q3,4,5=1 / SFS=0.69 / XTweaks = 34, 10, 0, 0, 0 / Straight Contiguous / Clock Resolution = 15ms / Scheme 3-5 (low/realtime) / 8x Arc Prediction / switch #5 'up/off' / Unattended) mobo USB3 port -> Lush^2 -> Phasure NOS1a B75 G3 -> 8m Blaxius^2 -> First Watt F5-cloned mono amps -> Tune Audio Anima horn speakers
Office System:
Phasure Mach II (with Nick's clock upgrade) -> Lush^2 -> Phasure NOS1a G3 -> BD-Design BD30-SPR mono amps -> Tune Audio Marvel horn speakers
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