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Sapientiam

Location:

Hangzhou, PRC

Forum Post Count:

331

Join Date:

8/16/09

Last Online:

4 seconds ago

About Me:

Disruptive innovator in digital audio using ARM Cortex M-series and cheapo multibit DACs.

Interests (Hobbies, favorite activities, etc.):

Music, philosophy, engineering, gadgets, teas, curries, gals.

What I do for a living:

Been working most of my time on multibit DAC designs. Rest of time teaching English one-to-one.

Headphone Inventory

Shure E3, E5, Sony MDR-CD3000, Sennheiser HD-420

Headphone Amp Inventory

No separate head-amps, all mine are integrated with multibit DACs. Currently I'm using AD815s but in the past have gone through AD8017 and AD8016.

Source Inventory

SD card players (QA550 and Taobao-sourced one using STM32F407) feeding homemade multibit DACs (TDA1545A, TDA1387) with massive cap arrays on the supplies and LC anti-image filters. I use old DVD players for S/PDIF sources.

Cable Inventory

Not a believer in cables hence none to speak of. Doesn't mean I don't believe in cable sound though - just that it should be taken out of the equation by other means than by rolling cables.

Power-Related Components

Own designed wideband mains filters using air-cored steel inductors.

Other Audio Equipment

M-Audio 24/96, Asus DX & Essence ST, Creative X-Fi extreme music, Fayou active XPE, 08 and ArtMasters, B&W CM1s, Hivi D1010s and D1080 MkIIs, 2 Xindak integrated amps, extensive mods to PSUs and grounding. Heavily modified 3Nod desktop monitors. Paiyon passive bookshelf monitors on stands

Audio-Related Tweaks

Mains balancing transformers (1kVA).

Music Preferences

Classical, acoustic rock, world, new age, jazz.

Interests (non-headphone)

Philosophy, piano, psychology. drinking tea, Asian foods and of course, pizza.

Gear-Fi (Favorite Non-Audio Gear & Gadgets)

Kawai GS-30 grand piano, Schimmel upright.

Sapientiam's Recent Activity

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Thoughts on a bunch of DACs (and why I hate chocolate ice cream)
Sapientiam posted in this thread in Dedicated Source Components 2/23/15 at 9:05pm | 2753 replies | 268068 views
How do I find what DAC is in my Macbook Pro?
Sapientiam posted in this thread in Dedicated Source Components 2/14/15 at 6:00pm | 2 replies | 76 views
Circuit error in Lite DAC-AH: Easy fix
Sapientiam posted in this thread in Dedicated Source Components 2/9/15 at 12:09am | 210 replies | 39791 views
Using Computer PSU for DAC
Sapientiam posted in this thread in Dedicated Source Components 1/20/15 at 4:50pm | 8 replies | 293 views
Hi-fi audio signal chain -- no more sigma-delta
Sapientiam posted in this thread in Sound Science 1/19/15 at 9:33pm | 109 replies | 3206 views
Metrum Acoustics Octave
Sapientiam posted in this thread in Dedicated Source Components 10/25/14 at 6:39am | 697 replies | 80549 views
DAC performance using USB power Vs. dedicated power supply
Sapientiam posted in this thread in Portable Source Gear 6/2/14 at 6:34pm | 2 replies | 160 views
Hifiman is looking for the Amp designer
Sapientiam posted in this thread in Head-Direct Premier Sponsor Forum 5/20/14 at 8:23pm | 46 replies | 4331 views
Portable DACs vs Desktop DACs
Sapientiam posted in this thread in Dedicated Source Components 5/20/14 at 5:37pm | 10 replies | 507 views
Am I Wasting My Time Searching for a DAC?
Sapientiam posted in this thread in Dedicated Source Components 5/14/14 at 4:59pm | 26 replies | 1193 views

 

Sapientiam’s Photos

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Latest upload: Apr 27, 2014
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Latest upload: Apr 25, 2014

Sapientiam’s Embedded Photos

Sapientiam's photos in Ranking of 17 DACs and DAC Configurations
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Latest upload: Jan 18, 2015
Sapientiam's photos in December 2013 Mid-Level DAC Comparison
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Latest upload: Jan 9, 2014

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