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XXHighEnd > Ultimate Audio Playback > Phasure NOS1 DAC > Procedure for setting output bias of NOS1
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Author Topic: Procedure for setting output bias of NOS1  (Read 6719 times)
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Leo
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« on: January 16, 2014, 01:50:36 pm »
Hello Peter,

I would like to check the output bias of my NOS1  but I cannot find the manual anymore nor can I find the procedure on the forum.
Could you point the way (again)?

regards,
Leo
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Dedicated silent audio pc HFX classic, Windows 8 pro 64bit  / Intel 3930 CPU 6 cores 12 threads,  ASRock x79 Extreme4-M/ SeaSonic Platinum 400w ATX PSU / 16Gb RAM , music on (SATAIII), MinOS/ Engine#4 Special Mode / Q1/2/3/4/5 = *6*/0/1/1/1 Qf=1 (Dev.Buffer = 4096) / not Invert / Playerprio = Low / ThreadPrio = Real Time / *Scheme = 1-2* @ UnAttended  /Services Off + No Running Time / Octo Arc Prediction Upsampling / *SFS=0,4 max= 120*  XT Tweaks balanced load 43, nervous=100, cool when idle 1, Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = Optimal / Time Stability = On / Double Octo Arc Prediction Upsampling / -> USB with Dexa clock -> 24/768 Phasure NOS1 async USB DAC, Driver v1.0.3 (2ms) ->  direct to AMP: Gainclone mid high, Hypex DPS400 low, horn system (tractrix for mid/high, BD for bass with Oris200)
juanpmar
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« Reply #1 on: January 16, 2014, 02:10:52 pm »
Hi Leo,

Speaking from memory. Turn all off. Turn on the NOS1 (main on/off switch), wait a few seconds and turn on the dac section (switch n. 2 from the outside). If you see a value of around +/-10.00 is ok (could be + or -, e.g. in my case is -10.00 and -8.50).

Probably you have to repeat the procedure four or five times, only turning on and off the switch n.2 and leaving the NOS1 On all this time.

If you can´t get the correct values then you have to start all the procedure from the beginning. Tourning all off etc.

It looks like it is easier if you have the NOS1 connected to the computer with the USB cable but be careful with the amp and turn it off or otherwise you could have big thumbs when you turn the dac off.

Best regards,
Juan

PS. The light switch for the little screens is n.4 from outside
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Audio Pc: Processor i7 970: 3200MHz (reduced to 1668MHz), 6+6 cores/ RAM Corsair DDR3, 24Gb, 1333MHz/ Mb Asus X58 Sabertooth/ OS and XXHE in Peter's RAM-Disk / The CPU fan is the only one in the Audio Pc: NF-S12A (600rpm/6.7db)/ No graphic card/ Power supply: Seasonic SS-400FL2, fanless.

Configuration and Updates in HOW I'VE BUILT MY NEW PC...http://www.phasure.com/index.php?topic=1673.0. This post is very old but maybe someone still find it useful

XXHighEnd: 2.11a. Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN/ KS:Phasure NOS1 Out 4.0/ #4 Engine/ Adaptive Mode/ Q1=10, Q3,4,5=1, xQ1=15/ Dev.Buffer: 4096/ ClockRes: 15ms/ Straight Contiguous/ SFS: 0.69 (max 0,69)/ Not Invert/ Phase Alignment Off/ Allow format change/ Decode HDCD/ Playerprio: Low/ ThreadPrio: Real Time/ Scheme: Core 3-5/ UnAttended/ Not Switch during Playback Off/ Playback Drive none/ UnAttended/ Include Garbage Collect/ Copy to XX Drive by standard/ Always clear Proxy before Playback/ Stop Desktop Services/ Stop Remaining Services/ Stop All Services: Off/ Keep LAN Services: On - Persist: Off/ Use Remote Desktop/ Minimize OS/ XTweaks : Balanced Load 35/ Nervous Rate 10/ Cool when Idle -/ Provide Stable Power 0/ Utilize Cores always 1/ Time Performance Index: Optimal / Time Stability: Stable / Arc Prediction/ Number of cores in use: 12 (máx. 6-12)

Music Server PC (W10) totally silent with OS (W10) in SSD and music inside in SSDs - RDC > Ethernet Gigabyte cable 3m > Audio Pc > 1m USB Lush cable directly from the USB3.0 in the motherboard > PHASURE NOS1a-75B-G3 (Driver v1.0.4) 16ms > Blaxius BNC interconnects > Genelec 1037B 3-Way Active speakers with BNC inputs
Leo
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« Reply #2 on: January 16, 2014, 03:40:44 pm »
Thanks!

Your memory is better than mine:)

Leo
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Dedicated silent audio pc HFX classic, Windows 8 pro 64bit  / Intel 3930 CPU 6 cores 12 threads,  ASRock x79 Extreme4-M/ SeaSonic Platinum 400w ATX PSU / 16Gb RAM , music on (SATAIII), MinOS/ Engine#4 Special Mode / Q1/2/3/4/5 = *6*/0/1/1/1 Qf=1 (Dev.Buffer = 4096) / not Invert / Playerprio = Low / ThreadPrio = Real Time / *Scheme = 1-2* @ UnAttended  /Services Off + No Running Time / Octo Arc Prediction Upsampling / *SFS=0,4 max= 120*  XT Tweaks balanced load 43, nervous=100, cool when idle 1, Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = Optimal / Time Stability = On / Double Octo Arc Prediction Upsampling / -> USB with Dexa clock -> 24/768 Phasure NOS1 async USB DAC, Driver v1.0.3 (2ms) ->  direct to AMP: Gainclone mid high, Hypex DPS400 low, horn system (tractrix for mid/high, BD for bass with Oris200)
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